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Goossen RL, van Vliet R, Bos LDJ, Buiteman-Kruizinga LA, Hollman MW, Myatra SN, Neto AS, Spronk PE, van der Woude MCE, van Meenen DMP, Paulus F, Schultz MJ. High PEEP/low FiO 2 ventilation is associated with lower mortality in COVID-19. J Crit Care 2024; 83:154854. [PMID: 38996499 DOI: 10.1016/j.jcrc.2024.154854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 06/07/2024] [Accepted: 06/23/2024] [Indexed: 07/14/2024]
Abstract
RATIONALE The positive end-expiratory pressure (PEEP) strategy in patients with coronavirus 2019 (COVID-19) acute respiratory distress syndrome (ARDS) remains debated. Most studies originate from the initial waves of the pandemic. Here we aimed to assess the impact of high PEEP/low FiO2 ventilation on outcomes during the second wave in the Netherlands. METHODS Retrospective observational study of invasively ventilated COVID-19 patients during the second wave. Patients were categorized based on whether they received high PEEP or low PEEP ventilation according to the ARDS Network tables. The primary outcome was ICU mortality, and secondary outcomes included hospital and 90-day mortality, duration of ventilation and length of stay, and the occurrence of kidney injury. Propensity matching was performed to correct for factors with a known relationship to ICU mortality. RESULTS This analysis included 790 COVID-ARDS patients. At ICU discharge, 32 (22.5%) out of 142 high PEEP patients and 254 (39.2%) out of 848 low PEEP patients had died (HR 0.66 [0.46-0.96]; P = 0.03). High PEEP was linked to improved secondary outcomes. Matched analysis did not change findings. CONCLUSIONS High PEEP ventilation was associated with improved ICU survival in patients with COVID-ARDS.
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Affiliation(s)
- Robin L Goossen
- Department of Intensive Care, Amsterdam University Medical Centers, Location AMC, Amsterdam, the Netherlands.
| | - Relin van Vliet
- Department of Intensive Care, Amsterdam University Medical Centers, Location AMC, Amsterdam, the Netherlands
| | - Lieuwe D J Bos
- Department of Intensive Care, Amsterdam University Medical Centers, Location AMC, Amsterdam, the Netherlands
| | - Laura A Buiteman-Kruizinga
- Department of Intensive Care, Amsterdam University Medical Centers, Location AMC, Amsterdam, the Netherlands; Department of Intensive Care, Reinier de Graaf Hospital, Delft, the Netherlands
| | - Markus W Hollman
- Department of Anesthesiology, Amsterdam University Medical Centers, Location AMC, Amsterdam, the Netherlands
| | - Sheila N Myatra
- Department of Anesthesiology, Critical Care and Pain, Tata Memorial Hospital, Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Ary Serpa Neto
- Australian and New Zealand Intensive Care Research Centre (ANZIC-RC), School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia; Department of Critical Care, University of Melbourne, Melbourne, Australia; Department of Critical Care Medicine, Australian and New Zealand Intensive Care Research Centre (ANZIC-RC), Monash University, Melbourne, Australia; Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Peter E Spronk
- Department of Intensive Care, Gelre Hospitals, Apeldoorn, the Netherlands
| | | | - David M P van Meenen
- Department of Intensive Care, Amsterdam University Medical Centers, Location AMC, Amsterdam, the Netherlands; Department of Anesthesiology, Amsterdam University Medical Centers, Location AMC, Amsterdam, the Netherlands
| | - Frederique Paulus
- Department of Intensive Care, Amsterdam University Medical Centers, Location AMC, Amsterdam, the Netherlands; Faculty of Health, ACHIEVE, center of applied research, University of Applied Research, Amsterdam, the Netherlands
| | - Marcus J Schultz
- Department of Intensive Care, Amsterdam University Medical Centers, Location AMC, Amsterdam, the Netherlands; Mahidol Oxford Tropical Medicine Research Unit (MORU), Mahidol University, Bangkok, Thailand; Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom; Department of Anesthesia, General Intensive Care and Pain Management, Division of Cardiothoracic and Vascular Anesthesia & Critical Care Medicine, Medical University of Vienna, Vienna, Austria
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2
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Wang Z, Cheng Q, Huang S, Sun J, Xu J, Xie J, Cao H, Guo F. Effect of perioperative sigh ventilation on postoperative hypoxemia and pulmonary complications after on-pump cardiac surgery (E-SIGHT): study protocol for a randomized controlled trial. Trials 2024; 25:585. [PMID: 39232795 PMCID: PMC11373100 DOI: 10.1186/s13063-024-08416-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Accepted: 08/21/2024] [Indexed: 09/06/2024] Open
Abstract
BACKGROUND Postoperative hypoxemia and pulmonary complications remain a frequent event after on-pump cardiac surgery and mostly characterized by pulmonary atelectasis. Surfactant dysfunction or hyposecretion happens prior to atelectasis formation, and sigh represents the strongest stimulus for surfactant secretion. The role of sigh breaths added to conventional lung protective ventilation in reducing postoperative hypoxemia and pulmonary complications among cardiac surgery is unknown. METHODS The perioperative sigh ventilation in cardiac surgery (E-SIGHT) trial is a single-center, two-arm, randomized controlled trial. In total, 192 patients scheduled for elective cardiac surgery with cardiopulmonary bypass (CPB) and aortic cross-clamp will be randomized into one of the two treatment arms. In the experimental group, besides conventional lung protective ventilation, sigh volumes producing plateau pressures of 35 cmH2O (or 40 cmH2O for patients with body mass index > 35 kg/m2) delivered once every 6 min from intubation to extubation. In the control group, conventional lung protective ventilation without preplanned recruitment maneuvers is used. Lung protective ventilation (LPV) consists of low tidal volumes (6-8 mL/kg of predicted body weight) and positive end-expiratory pressure (PEEP) setting according to low PEEP/FiO2 table for acute respiratory distress syndrome (ARDS). The primary endpoint is time-weighted average SpO2/FiO2 ratio during the initial post-extubation hour. Main secondary endpoint is the severity of postoperative pulmonary complications (PPCs) computed by postoperative day 7. DISCUSSION The E-SIGHT trial will be the first randomized controlled trial to evaluate the impact of perioperative sigh ventilation on the postoperative outcomes after on-pump cardiac surgery. The trial will introduce and assess a novel perioperative ventilation approach to mitigate the risk of postoperative hypoxemia and PPCs in patients undergoing cardiac surgery. Also provide the basis for a future larger trial aiming at verifying the impact of sigh ventilation on postoperative pulmonary complications. TRIAL REGISTRATION ClinicalTrials.gov NCT06248320. Registered on January 30, 2024. Last updated February 26, 2024.
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Affiliation(s)
- Zhichang Wang
- Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Qiyu Cheng
- Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Shenglun Huang
- Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Jie Sun
- Department of Anesthesiology, Surgery and Pain Management, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Jingyuan Xu
- Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Jianfeng Xie
- Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, 210009, China
| | - Hailong Cao
- Department of Cardiothoracic Surgery, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, 210009, China.
| | - Fengmei Guo
- Jiangsu Provincial Key Laboratory of Critical Care Medicine, Department of Critical Care Medicine, Zhongda Hospital, School of Medicine, Southeast University, Nanjing, 210009, China.
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3
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Ruiz-Botella M, Manrique S, Gomez J, Bodí M. Advancing ICU patient care with a Real-Time predictive model for mechanical Power to mitigate VILI. Int J Med Inform 2024; 189:105511. [PMID: 38851133 DOI: 10.1016/j.ijmedinf.2024.105511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 05/24/2024] [Accepted: 05/29/2024] [Indexed: 06/10/2024]
Abstract
BACKGROUND Invasive Mechanical Ventilation (IMV) in Intensive Care Units (ICU) significantly increases the risk of Ventilator-Induced Lung Injury (VILI), necessitating careful management of mechanical power (MP). This study aims to develop a real-time predictive model of MP utilizing Artificial Intelligence to mitigate VILI. METHODOLOGY A retrospective observational study was conducted, extracting patient data from Clinical Information Systems from 2018 to 2022. Patients over 18 years old with more than 6 h of IMV were selected. Continuous data on IMV variables, laboratory data, monitoring, procedures, demographic data, type of admission, reason for admission, and APACHE II at admission were extracted. The variables with the highest correlation to MP were used for prediction and IMV data was grouped in 15-minute intervals using the mean. A mixed neural network model was developed to forecast MP 15 min in advance, using IMV data from 6 h before the prediction and current patient status. The model's ability to predict future MP was analyzed and compared to a baseline model predicting the future value of MP as equal to the current value. RESULTS The cohort consisted of 1967 patients after applying inclusion criteria, with a median age of 63 years and 66.9 % male. The deep learning model achieved a mean squared error of 2.79 in the test set, indicating a 20 % improvement over the baseline model. It demonstrated high accuracy (94 %) in predicting whether MP would exceed a critical threshold of 18 J/min, which correlates with increased mortality. The integration of this model into a web platform allows clinicians real-time access to MP predictions, facilitating timely adjustments to ventilation settings. CONCLUSIONS The study successfully developed and integrated in clinical practice a predictive model for MP. This model will assist clinicians allowing for the adjustment of ventilatory parameters before lung damage occurs.
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Affiliation(s)
- M Ruiz-Botella
- Departament of Chemical Engineering, Universitat Rovira I Virgili, Tarragona, Spain; Instituto de Investigación Sanitaria Pere i Virgili, Universidad Rovira i Virgili, Tarragona, Spain.
| | - S Manrique
- Instituto de Investigación Sanitaria Pere i Virgili, Universidad Rovira i Virgili, Tarragona, Spain; Critical Care department, Hospital Universitario Joan XXIII, Tarragona, Spain
| | - J Gomez
- Instituto de Investigación Sanitaria Pere i Virgili, Universidad Rovira i Virgili, Tarragona, Spain; Critical Care department, Hospital Universitario Joan XXIII, Tarragona, Spain
| | - M Bodí
- Instituto de Investigación Sanitaria Pere i Virgili, Universidad Rovira i Virgili, Tarragona, Spain; Critical Care department, Hospital Universitario Joan XXIII, Tarragona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES). Instituto de Salud Carlos III, Spain
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4
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Parhar KKS, Doig C. Caution-Do Not Attempt This at Home. Airway Pressure Release Ventilation Should Not Routinely Be Used in Patients With or at Risk of Acute Respiratory Distress Syndrome Outside of a Clinical Trial. Crit Care Med 2024; 52:1451-1457. [PMID: 36661571 DOI: 10.1097/ccm.0000000000005776] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Ken Kuljit S Parhar
- Department of Critical Care Medicine, University of Calgary and Alberta Health Services, ICU Administration - Ground Floor - McCaig Tower, Foothills Medical Center, Calgary, AB, Canada
- O'Brien Institute for Public Health, University of Calgary, Calgary, AB, Canada
- Libin Cardiovascular Institute, University of Calgary, Calgary, AB, Canada
| | - Christopher Doig
- Department of Critical Care Medicine, University of Calgary and Alberta Health Services, ICU Administration - Ground Floor - McCaig Tower, Foothills Medical Center, Calgary, AB, Canada
- O'Brien Institute for Public Health, University of Calgary, Calgary, AB, Canada
- Department of Community Health Sciences, University of Calgary, Calgary, AB, Canada
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5
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Steckert GV, Borba SA, Marchese GM, Medeiros FS, Garcia TS, Boniatti MM, Wawrzeniak IC. Respiratory mechanics characteristics at the time of barotrauma presentation in patients with critical COVID-19 infection. CRITICAL CARE SCIENCE 2024; 36:e20240248en. [PMID: 39230074 DOI: 10.62675/2965-2774.20240248-en] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Accepted: 04/16/2024] [Indexed: 09/05/2024]
Abstract
OBJECTIVE To evaluate how ventilatory support, the duration of invasive ventilatory support use and lung mechanics are related to barotrauma development in patients who are severely infected with COVID-19 and who are admitted to the intensive care unit and develop pulmonary barotrauma. METHODS Retrospective cohort study of patients who were severely infected with COVID-19 and who developed pulmonary barotrauma secondary to mechanical ventilation. RESULTS This study included 60 patients with lung barotrauma who were divided into two groups: 37 with early barotrauma and 23 with late barotrauma. The early barotrauma group included more individuals who needed noninvasive ventilation (62.2% versus 26.1%, p = 0.01). The tidal volume/kg of predicted body weight on the day of barotrauma was measured, and 24 hours later, it was significantly greater in the late barotrauma group than in the early barotrauma group. During the day, barotrauma was accompanied by plateau pressure and driving pressure accompanied by tidal volume, which significantly increased in the late barotrauma group. According to the SAPS 3, patients in the early barotrauma group had more pulmonary thromboembolism and more severe illness. However, the intensive care unit mortality rates did not significantly differ between the two groups (66.7% for early barotrauma versus 76.9% for late barotrauma). CONCLUSION We investigated the effect of respiratory mechanics on barotrauma in patients with severe COVID-19 and found that 25% of patients were on nonprotective ventilation parameters when they developed barotrauma. However, 50% of patients were on protective ventilation parameters, suggesting that other nonventilatory factors may contribute to barotrauma.
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Affiliation(s)
- Gabriela Vieira Steckert
- Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul -Porto Alegre (RS), Brazil
| | - Sophia Andreola Borba
- Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul -Porto Alegre (RS), Brazil
| | | | | | - Tiago Severo Garcia
- Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul -Porto Alegre (RS), Brazil
| | - Marcio Manozzo Boniatti
- Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul -Porto Alegre (RS), Brazil
| | - Iuri Christmann Wawrzeniak
- Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul -Porto Alegre (RS), Brazil
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6
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van der Ven FSLIM, Blok SG, Azevedo LC, Bellani G, Botta M, Estenssoro E, Fan E, Ferreira JC, Laffey JG, Martin-Loeches I, Motos A, Pham T, Peñuelas O, Pesenti A, Pisani L, Neto AS, Schultz MJ, Torres A, Tsonas AM, Paulus F, van Meenen DMP. Epidemiology, ventilation management and outcomes of COVID-19 ARDS patients versus patients with ARDS due to pneumonia in the Pre-COVID era. Respir Res 2024; 25:312. [PMID: 39153979 PMCID: PMC11330602 DOI: 10.1186/s12931-024-02910-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Accepted: 07/07/2024] [Indexed: 08/19/2024] Open
Abstract
BACKGROUND Ventilation management may differ between COVID-19 ARDS (COVID-ARDS) patients and patients with pre-COVID ARDS (CLASSIC-ARDS); it is uncertain whether associations of ventilation management with outcomes for CLASSIC-ARDS also exist in COVID-ARDS. METHODS Individual patient data analysis of COVID-ARDS and CLASSIC-ARDS patients in six observational studies of ventilation, four in the COVID-19 pandemic and two pre-pandemic. Descriptive statistics were used to compare epidemiology and ventilation characteristics. The primary endpoint were key ventilation parameters; other outcomes included mortality and ventilator-free days and alive (VFD-60) at day 60. RESULTS This analysis included 6702 COVID-ARDS patients and 1415 CLASSIC-ARDS patients. COVID-ARDS patients received lower median VT (6.6 [6.0 to 7.4] vs 7.3 [6.4 to 8.5] ml/kg PBW; p < 0.001) and higher median PEEP (12.0 [10.0 to 14.0] vs 8.0 [6.0 to 10.0] cm H2O; p < 0.001), at lower median ΔP (13.0 [10.0 to 15.0] vs 16.0 [IQR 12.0 to 20.0] cm H2O; p < 0.001) and higher median Crs (33.5 [26.6 to 42.1] vs 28.1 [21.6 to 38.4] mL/cm H2O; p < 0.001). Following multivariable adjustment, higher ΔP had an independent association with higher 60-day mortality and less VFD-60 in both groups. Higher PEEP had an association with less VFD-60, but only in COVID-ARDS patients. CONCLUSIONS Our findings show important differences in key ventilation parameters and associations thereof with outcomes between COVID-ARDS and CLASSIC-ARDS. TRIAL REGISTRATION Clinicaltrials.gov (identifier NCT05650957), December 14, 2022.
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Affiliation(s)
- Fleur-Stefanie L I M van der Ven
- Department of Intensive Care, Amsterdam University Medical Centers, Location 'AMC', Meibergdreef 9, 1105, AZ, Amsterdam, The Netherlands.
- Department of Intensive Care, Rode Kruis Ziekenhuis, Beverwijk, The Netherlands.
| | - Siebe G Blok
- Department of Intensive Care, Amsterdam University Medical Centers, Location 'AMC', Meibergdreef 9, 1105, AZ, Amsterdam, The Netherlands
| | - Luciano C Azevedo
- Department of Emergency Medicine, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
- Department of Intensive Care, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Giacomo Bellani
- Centre for Medical Sciences (CISMed), University of Trento, Trento, Italy
- Department of Anesthesia and Intensive Care, Santa Chiara Hospital, APSS Trento, Trento, Italy
| | - Michela Botta
- Department of Intensive Care, Amsterdam University Medical Centers, Location 'AMC', Meibergdreef 9, 1105, AZ, Amsterdam, The Netherlands
| | - Elisa Estenssoro
- Department of Intensive Care, Hospital Interzonal de Agudos General San Martin La Plata, Buenos Aires, Argentina
| | - Eddy Fan
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
| | - Juliana Carvalho Ferreira
- Department of Pulmonology, Instituto Do Coracao (InCor), Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, São Paulo, Brazil
- Department of Intensive Care, AC Camargo Cancer Center, São Paulo, Brazil
- Brazilian Research in Intensive Care Network (BRICNet), São Paulo, Brazil
| | - John G Laffey
- Department of Anaesthesiology and Intensive Care, Galway University Hospital, Saolta Hospital Group, Galway, Ireland
- School of Medicine, University of Galway, Galway, Ireland
| | - Ignacio Martin-Loeches
- Department of Intensive Care, Multidisciplinary Intensive Care Research Organization (MICRO), St James' Hospital, Dublin, Ireland
- Department of Intensive Care, Hospital Clínic de Barcelona, Barcelona, Spain
| | - Ana Motos
- Departement of Pulmonology, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Hospital Clínic de Barcelona, Barcelona, Spain
- Centro de Investigación Biomédica en Red en Enfermedades Respiratorias (CIBERES), Institute of Health Carlos III, Madrid, Spain
- University of Barcelona, Barcelona, Spain
| | - Tai Pham
- Equipe d'Epidémiologie Respiratoire Integrative, Université Paris-Saclay, Paris, France
- Service de Médecine Intensive-Réanimation, DMU CORREVE, FHU SEPSIS, Groupe de Recherche Clinique CARMAS, Hôpital de Bicêtre, Paris, France
| | - Oscar Peñuelas
- Centro de Investigación Biomédica en Red en Enfermedades Respiratorias (CIBERES), Institute of Health Carlos III, Madrid, Spain
- Department of Intensive Care, Hospital Universitario de Getafe, Getafe, Spain
| | - Antonio Pesenti
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Luigi Pisani
- Department of Intensive Care, Amsterdam University Medical Centers, Location 'AMC', Meibergdreef 9, 1105, AZ, Amsterdam, The Netherlands
- Department of Anesthesia and Intensive Care, Miulli Regional Hospital, Acquaviva Delle Fonti, Italy
- Mahidol-Oxford Tropical Medicine Research Unit (MORU), Mahidol University, Bangkok, Thailand
| | - Ary Serpa Neto
- Department of Intensive Care, Hospital Israelita Albert Einstein, São Paulo, Brazil
- Australian and New Zealand Intensive Care Research Centre (ANZIC-RC), Monash University, Melbourne, Australia
| | - Marcus J Schultz
- Department of Intensive Care, Amsterdam University Medical Centers, Location 'AMC', Meibergdreef 9, 1105, AZ, Amsterdam, The Netherlands
- Mahidol-Oxford Tropical Medicine Research Unit (MORU), Mahidol University, Bangkok, Thailand
- Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Department of Anesthesia, General Intensive Care and Pain Management, Division of Cardiothoracic and Vascular Anesthesia & Critical Care Medicine, Medical University of Vienna, Vienna, Austria
- Laboratory of Experimental Intensive Care & Anaesthesiology (L·E·I·C·A), Amsterdam UMC, Location AMC, Amsterdam, The Netherlands
| | - Antoni Torres
- Departement of Pulmonology, Institut d'Investigacions Biomèdiques August Pi I Sunyer (IDIBAPS), Hospital Clínic de Barcelona, Barcelona, Spain
- Centro de Investigación Biomédica en Red en Enfermedades Respiratorias (CIBERES), Institute of Health Carlos III, Madrid, Spain
- University of Barcelona, Barcelona, Spain
- Catalan Institution for Research and Advanced Studies (ICREA), Barcelona, Spain
| | - Anissa M Tsonas
- Department of Intensive Care, Amsterdam University Medical Centers, Location 'AMC', Meibergdreef 9, 1105, AZ, Amsterdam, The Netherlands
| | - Frederique Paulus
- Department of Intensive Care, Amsterdam University Medical Centers, Location 'AMC', Meibergdreef 9, 1105, AZ, Amsterdam, The Netherlands
- Center of Expertise Urban Vitality, Faculty of Health, Amsterdam University of Applied Sciences, Amsterdam, The Netherlands
| | - David M P van Meenen
- Department of Intensive Care, Amsterdam University Medical Centers, Location 'AMC', Meibergdreef 9, 1105, AZ, Amsterdam, The Netherlands
- Department of Anaesthesiology, Amsterdam UMC, Location AMC, Amsterdam, The Netherlands
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Lagier D, Zeng C, Kaczka DW, Zhu M, Grogg K, Gerard SE, Reinhardt JM, Ribeiro GCM, Rashid A, Winkler T, Vidal Melo MF. Mechanical ventilation guided by driving pressure optimizes local pulmonary biomechanics in an ovine model. Sci Transl Med 2024; 16:eado1097. [PMID: 39141699 DOI: 10.1126/scitranslmed.ado1097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 05/13/2024] [Accepted: 07/24/2024] [Indexed: 08/16/2024]
Abstract
Mechanical ventilation exposes the lung to injurious stresses and strains that can negatively affect clinical outcomes in acute respiratory distress syndrome or cause pulmonary complications after general anesthesia. Excess global lung strain, estimated as increased respiratory system driving pressure, is associated with mortality related to mechanical ventilation. The role of small-dimension biomechanical factors underlying this association and their spatial heterogeneity within the lung are currently unknown. Using four-dimensional computed tomography with a voxel resolution of 2.4 cubic millimeters and a multiresolution convolutional neural network for whole-lung image segmentation, we dynamically measured voxel-wise lung inflation and tidal parenchymal strains. Healthy or injured ovine lungs were evaluated as the mechanical ventilation positive end-expiratory pressure (PEEP) was titrated from 20 to 2 centimeters of water. The PEEP of minimal driving pressure (PEEPDP) optimized local lung biomechanics. We observed a greater rate of change in nonaerated lung mass with respect to PEEP below PEEPDP compared with PEEP values above this threshold. PEEPDP similarly characterized a breaking point in the relationships between PEEP and SD of local tidal parenchymal strain, the 95th percentile of local strains, and the magnitude of tidal overdistension. These findings advance the understanding of lung collapse, tidal overdistension, and strain heterogeneity as local triggers of ventilator-induced lung injury in large-animal lungs similar to those of humans and could inform the clinical management of mechanical ventilation to improve local lung biomechanics.
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Affiliation(s)
- David Lagier
- Experimental Interventional Imaging Laboratory (LIIE), European Center for Research in Medical Imaging (CERIMED), Aix Marseille University, Marseille 13005, France
- Department of Anesthesia and Critical Care, University Hospital La Timone, APHM, Marseille 13005, France
| | - Congli Zeng
- Department of Anesthesiology, Vagelos College of Physicians and Surgeons, Columbia University, New York City, NY 10032, USA
| | - David W Kaczka
- Departments of Anesthesia and Radiology, University of Iowa, Iowa City, IA 52242, USA
- Roy J. Carver Department of Biomedical Engineering, University of Iowa, Iowa City, IA 52242, USA
| | - Min Zhu
- Guizhou University South Campus, Guiyang City 550025, China
| | - Kira Grogg
- Yale PET Center, Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT 06520, USA
| | - Sarah E Gerard
- Roy J. Carver Department of Biomedical Engineering, University of Iowa, Iowa City, IA 52242, USA
| | - Joseph M Reinhardt
- Roy J. Carver Department of Biomedical Engineering, University of Iowa, Iowa City, IA 52242, USA
| | - Gabriel C Motta Ribeiro
- Biomedical Engineering Program, Alberto Luiz Coimbra Institute for Graduate Studies and Research in Engineering, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-594, Brazil
| | - Azman Rashid
- Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Tilo Winkler
- Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Marcos F Vidal Melo
- Department of Anesthesiology, Vagelos College of Physicians and Surgeons, Columbia University, New York City, NY 10032, USA
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8
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Diniz-Silva F, Pinheiro BV, Reyes LF, Cavalcanti AB, Figueredo B, Rios F, Machado FR, Preda G, Bugedo G, Maia IS, da Silveira LTY, Herrera L, Jibaja M, Ibarra-Estrada M, Cestari M, Nin N, Roldan R, dos Santos TM, Veiga VC, Bruhn A, Ferreira JC. Adherence to low tidal volume in the transition to spontaneous ventilation in patients with acute respiratory failure in intensive care units in Latin America (SPIRAL): a study protocol. CRITICAL CARE SCIENCE 2024; 36:e20240044en. [PMID: 39140527 PMCID: PMC11321717 DOI: 10.62675/2965-2774.20240044-en] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 04/07/2024] [Indexed: 08/15/2024]
Abstract
OBJECTIVE Patients with acute respiratory failure often require mechanical ventilation to reduce the work of breathing and improve gas exchange; however, this may exacerbate lung injury. Protective ventilation strategies, characterized by low tidal volumes (≤ 8mL/kg of predicted body weight) and limited plateau pressure below 30cmH2O, have shown improved outcomes in patients with acute respiratory distress syndrome. However, in the transition to spontaneous ventilation, it can be challenging to maintain tidal volume within protective levels, and it is unclear whether low tidal volumes during spontaneous ventilation impact patient outcomes. We developed a study protocol to estimate the prevalence of low tidal volume ventilation in the first 24 hours of spontaneous ventilation in patients with hypoxemic acute respiratory failure and its association with ventilator-free days and survival. METHODS We designed a multicenter, multinational, cohort study with a 28-day follow-up that will include patients with acute respiratory failure, defined as a partial oxygen pressure/fraction of inspired oxygen ratio < 300mmHg, in transition to spontaneous ventilation in intensive care units in Latin America. RESULTS We plan to include 422 patients in ten countries. The primary outcomes are the prevalence of low tidal volume in the first 24 hours of spontaneous ventilation and ventilator-free days on day 28. The secondary outcomes are intensive care unit and hospital mortality, incidence of asynchrony and return to controlled ventilation and sedation. CONCLUSION In this study, we will assess the prevalence of low tidal volume during spontaneous ventilation and its association with clinical outcomes, which can inform clinical practice and future clinical trials.
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Affiliation(s)
- Fabia Diniz-Silva
- Universidade de São PauloFaculdade de MedicinaHospital das ClínicasSão PauloSPBrazilDivision of Pulmonology, Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo - São Paulo (SP), Brazil.
| | - Bruno Valle Pinheiro
- Universidade Federal de Juiz de ForaHospital UniversitárioJuiz de ForaMGBrazilHospital Universitário, Universidade Federal de Juiz de Fora - Juiz de Fora (MG), Brazil.
| | - Luis Felipe Reyes
- Universidad de La SabanaFacultad de MedicinaUnisabana Center for Translational ScienceChiaColombiaUnisabana Center for Translational Science, Facultad de Medicina, Universidad de La Sabana - Chia, Colombia.
| | - Alexandre Biasi Cavalcanti
- HCor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, HCor-Hospital do Coração - São Paulo (SP), Brazil.
| | - Belinda Figueredo
- Universidad Nacional de AsuncionFacultad de Ciencias MedicasHospital de ClinicasAsuncionParaguayHospital de Clinicas, Facultad de Ciencias Medicas, Universidad Nacional de Asuncion - Asuncion, Paraguay.
| | - Fernando Rios
- Hospital San Juan de DiosRamos MejiaArgentinaHospital San Juan de Dios - Ramos Mejia, Buenos Aires, Argentina.
| | - Flávia Ribeiro Machado
- Universidade Federal de São PauloDepartment of Anesthesiology, Pain and Intensive MedicineSão PauloSPBrazilDepartment of Anesthesiology, Pain and Intensive Medicine, Universidade Federal de São Paulo - São Paulo (SP), Brazil.
| | - Gabriel Preda
- Sanatorio San RoqueAsuncionParaguaySanatorio San Roque - Asuncion, Paraguay.
| | - Guillermo Bugedo
- Universidad Catolica de ChileFacultad de MedicinaDepartment of Intensive MedicineSantiagoChileDepartment of Intensive Medicine, Facultad de Medicina, Pontificia Universidad Catolica de Chile - Santiago, Chile.
| | - Israel Silva Maia
- Hospital Nereu RamosFlorianópolisSCBrazilHospital Nereu Ramos, Florianópolis (SC), Brazil
| | - Leda Tomiko Yamada da Silveira
- Universidade de São PauloHospital UniversitárioSão PauloSPBrazilHospital Universitário, Universidade de São Paulo - São Paulo (SP), Brazil.
| | - Luis Herrera
- Hospital IESS de IbarraIbarraEcuadorHospital IESS de Ibarra - Ibarra, Ecuador.
| | - Manuel Jibaja
- Universidad San FranciscoEscuela MedicinaQuitoEcuadorEscuela Medicina, Universidad San Francisco - Quito, Ecuador.
| | - Miguel Ibarra-Estrada
- Hospital Civil Fray Antonio AlcaldeGuadalajaraJaliscoMexicoHospital Civil Fray Antonio Alcalde - Guadalajara, Jalisco, Mexico.
| | - Mino Cestari
- Hospital Alemão Oswaldo CruzSão PauloSPBrazilHospital Alemão Oswaldo Cruz - São Paulo (SP), Brazil.
| | - Nicolás Nin
- Hospital EspanholMontevideoUruguayHospital Espanhol - Montevideo, Uruguay.
| | - Rollin Roldan
- Hospital RebagliatiLimaPeruHospital Rebagliati - Lima, Peru.
| | - Tiago Mendonça dos Santos
- HCor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, HCor-Hospital do Coração - São Paulo (SP), Brazil.
| | - Viviane Cordeiro Veiga
- A Beneficência Portuguesa de São PauloSão PauloSPBrazilBP - A Beneficência Portuguesa de São Paulo - São Paulo (SP), Brazil.
| | - Alejandro Bruhn
- Universidad Catolica de ChileFacultad de MedicinaDepartment of Intensive MedicineSantiagoChileDepartment of Intensive Medicine, Facultad de Medicina, Pontificia Universidad Catolica de Chile - Santiago, Chile.
| | - Juliana Carvalho Ferreira
- Universidade de São PauloFaculdade de MedicinaHospital das ClínicasSão PauloSPBrazilDivision of Pulmonology, Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo - São Paulo (SP), Brazil.
| | - on behalf of SPIRAL Investigators, the Brazilian Research in Intensive Care Network (BRICNet), Latin America Intensive Care Network (LIVEN)
- Universidade de São PauloFaculdade de MedicinaHospital das ClínicasSão PauloSPBrazilDivision of Pulmonology, Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo - São Paulo (SP), Brazil.
- Universidade Federal de Juiz de ForaHospital UniversitárioJuiz de ForaMGBrazilHospital Universitário, Universidade Federal de Juiz de Fora - Juiz de Fora (MG), Brazil.
- Universidad de La SabanaFacultad de MedicinaUnisabana Center for Translational ScienceChiaColombiaUnisabana Center for Translational Science, Facultad de Medicina, Universidad de La Sabana - Chia, Colombia.
- HCor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, HCor-Hospital do Coração - São Paulo (SP), Brazil.
- Universidad Nacional de AsuncionFacultad de Ciencias MedicasHospital de ClinicasAsuncionParaguayHospital de Clinicas, Facultad de Ciencias Medicas, Universidad Nacional de Asuncion - Asuncion, Paraguay.
- Hospital San Juan de DiosRamos MejiaArgentinaHospital San Juan de Dios - Ramos Mejia, Buenos Aires, Argentina.
- Universidade Federal de São PauloDepartment of Anesthesiology, Pain and Intensive MedicineSão PauloSPBrazilDepartment of Anesthesiology, Pain and Intensive Medicine, Universidade Federal de São Paulo - São Paulo (SP), Brazil.
- Sanatorio San RoqueAsuncionParaguaySanatorio San Roque - Asuncion, Paraguay.
- Universidad Catolica de ChileFacultad de MedicinaDepartment of Intensive MedicineSantiagoChileDepartment of Intensive Medicine, Facultad de Medicina, Pontificia Universidad Catolica de Chile - Santiago, Chile.
- Hospital Nereu RamosFlorianópolisSCBrazilHospital Nereu Ramos, Florianópolis (SC), Brazil
- Universidade de São PauloHospital UniversitárioSão PauloSPBrazilHospital Universitário, Universidade de São Paulo - São Paulo (SP), Brazil.
- Hospital IESS de IbarraIbarraEcuadorHospital IESS de Ibarra - Ibarra, Ecuador.
- Universidad San FranciscoEscuela MedicinaQuitoEcuadorEscuela Medicina, Universidad San Francisco - Quito, Ecuador.
- Hospital Civil Fray Antonio AlcaldeGuadalajaraJaliscoMexicoHospital Civil Fray Antonio Alcalde - Guadalajara, Jalisco, Mexico.
- Hospital Alemão Oswaldo CruzSão PauloSPBrazilHospital Alemão Oswaldo Cruz - São Paulo (SP), Brazil.
- Hospital EspanholMontevideoUruguayHospital Espanhol - Montevideo, Uruguay.
- Hospital RebagliatiLimaPeruHospital Rebagliati - Lima, Peru.
- A Beneficência Portuguesa de São PauloSão PauloSPBrazilBP - A Beneficência Portuguesa de São Paulo - São Paulo (SP), Brazil.
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9
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Spatenkova V, Mlcek M, Mejstrik A, Cisar L, Kuriscak E. Standard versus individualised positive end-expiratory pressure (PEEP) compared by electrical impedance tomography in neurocritical care: a pilot prospective single centre study. Intensive Care Med Exp 2024; 12:67. [PMID: 39103646 DOI: 10.1186/s40635-024-00654-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 07/24/2024] [Indexed: 08/07/2024] Open
Abstract
BACKGROUND Individualised bedside adjustment of mechanical ventilation is a standard strategy in acute coma neurocritical care patients. This involves customising positive end-expiratory pressure (PEEP), which could improve ventilation homogeneity and arterial oxygenation. This study aimed to determine whether PEEP titrated by electrical impedance tomography (EIT) results in different lung ventilation homogeneity when compared to standard PEEP of 5 cmH2O in mechanically ventilated patients with healthy lungs. METHODS In this prospective single-centre study, we evaluated 55 acute adult neurocritical care patients starting controlled ventilation with PEEPs close to 5 cmH2O. Next, the optimal PEEP was identified by EIT-guided decremental PEEP titration, probing PEEP levels between 9 and 2 cmH2O and finding the minimal amount of collapse and overdistension. EIT-derived parameters of ventilation homogeneity were evaluated before and after the PEEP titration and after the adjustment of PEEP to its optimal value. Non-EIT-based parameters, such as peripheral capillary Hb saturation (SpO2) and end-tidal pressure of CO2, were recorded hourly and analysed before PEEP titration and after PEEP adjustment. RESULTS The mean PEEP value before titration was 4.75 ± 0.94 cmH2O (ranging from 3 to max 8 cmH2O), 4.29 ± 1.24 cmH2O after titration and before PEEP adjustment, and 4.26 ± 1.5 cmH2O after PEEP adjustment. No statistically significant differences in ventilation homogeneity were observed due to the adjustment of PEEP found by PEEP titration. We also found non-significant changes in non-EIT-based parameters following the PEEP titration and subsequent PEEP adjustment, except for the mean arterial pressure, which dropped statistically significantly (with a mean difference of 3.2 mmHg, 95% CI 0.45 to 6.0 cmH2O, p < 0.001). CONCLUSION Adjusting PEEP to values derived from PEEP titration guided by EIT does not provide any significant changes in ventilation homogeneity as assessed by EIT to ventilated patients with healthy lungs, provided the change in PEEP does not exceed three cmH2O. Thus, a reduction in PEEP determined through PEEP titration that is not greater than 3 cmH2O from an initial value of 5 cmH2O is unlikely to affect ventilation homogeneity significantly, which could benefit mechanically ventilated neurocritical care patients.
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Affiliation(s)
- Vera Spatenkova
- Neurocenter, Neurointensive Care Unit, Regional Hospital Liberec, Husova 357/10, 460 01, Liberec, Czech Republic.
- Institute of Physiology, First Faculty of Medicine, Charles University in Prague, Albertov 5, 128 00, Prague, Czech Republic.
- Department of Anaesthesia and Intensive Care, Third Faculty of Medicine, Charles University, Srobarova 50, 100 34, Prague, Czech Republic.
- Faculty of Health Studies, Technical University of Liberec, Studentská 1402/2, 461 17, Liberec 1, Czech Republic.
| | - Mikulas Mlcek
- Institute of Physiology, First Faculty of Medicine, Charles University in Prague, Albertov 5, 128 00, Prague, Czech Republic
| | - Alan Mejstrik
- Institute of Physiology, First Faculty of Medicine, Charles University in Prague, Albertov 5, 128 00, Prague, Czech Republic
- 2nd Department of Medicine-Department of Cardiovascular Medicine, Charles University in Prague, U nemocnice 2, 128 08, Prague, Czech Republic
| | - Lukas Cisar
- Technical Department, Regional Hospital Liberec, Husova 357/10, 460 01, Liberec, Czech Republic
| | - Eduard Kuriscak
- Institute of Physiology, First Faculty of Medicine, Charles University in Prague, Albertov 5, 128 00, Prague, Czech Republic
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10
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Santa Cruz R, Matesa A, Gómez A, Nadur J, Pagano F, Prieto D, Bolaños O, Solis B, Yusta S, González-Velásquez E, Estenssoro E, Cavalcanti A. Mortality Due to Acute Respiratory Distress Syndrome in Latin America. Crit Care Med 2024; 52:1275-1284. [PMID: 38635486 DOI: 10.1097/ccm.0000000000006312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
OBJECTIVES Mortality due to acute respiratory distress syndrome (ARDS) is a major global health problem. Knowledge of epidemiological data on ARDS is crucial to design management, treatment strategies, and optimize resources. There is ample data regarding mortality of ARDS from high-income countries; in this review, we evaluated mortality due to ARDS in Latin America. DATA SOURCES We searched in PubMed, Cochrane Central Register of Controlled Trials, Web of Science, and Latin American and Caribbean Health Science Literature databases from 1967 to March 2023. STUDY SELECTION We searched prospective or retrospective observational studies and randomized controlled trials conducted in Latin American countries reporting ARDS mortality. DATA EXTRACTION Three pairs of independent reviewers checked all studies for eligibility based on their titles and abstracts. We performed meta-analysis of proportions using a random-effects model. We performed sensitivity analyses including studies with low risk of bias and with diagnosis using the Berlin definition. Subgroup analysis comparing different study designs, time of publication (up to 2000 and from 2001 to present), and studies in which the diagnosis of ARDS was made using Pa o2 /F io2 less than or equal to 200 and regional variations. Subsequently, we performed meta-regression analyses. Finally, we graded the certainty of the evidence (Grading of Recommendations Assessment, Development, and Evaluation). DATA SYNTHESIS Of 3315 articles identified, 32 were included (3627 patients). Mortality was 52% in the pooled group (low certainty of evidence). In the sensitivity analysis (according to the Berlin definition), mortality was 46% (moderate certainty of evidence). In the subgroup analysis mortality was 53% (randomized controlled trials), 51% (observational studies), 66% (studies published up to 2000), 50% (studies after 2000), 44% (studies with Pa o2 /F io2 ≤ 200), 56% (studies from Argentina/Brazil), and 40% (others countries). No variables were associated with mortality in the meta-regression. CONCLUSIONS ARDS mortality in Latin America remains high, as in other regions. These results should constitute the basis for action planning to improve the prognosis of patients with ARDS (PROSPERO [CRD42022354035]).
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Affiliation(s)
- Roberto Santa Cruz
- Hospital General Ramos Mejía, Ciudad Autónoma de Buenos Aires, Argentina
- Universidad de Magallanes, Escuela de Medicina, Punta Arenas, Chile
- Instituto Universitario Ciencias de la Salud, Fundación Barceló, Argentina
| | - Amelia Matesa
- Clínica Basilea, Ciudad Autónoma de Buenos Aires, Argentina
| | - Antonella Gómez
- Hospital de Clínicas, Montevideo, Uruguay
- UDELAR, Universidad de la República, Montevideo, Uruguay
| | - Juan Nadur
- Hospital General Ramos Mejía, Ciudad Autónoma de Buenos Aires, Argentina
- Clínica CIAREC (Clínica de Internación Aguda en Rehabilitación y Cirugía), Buenos Aires, Argentina
| | - Fernando Pagano
- Hospital General Ramos Mejía, Ciudad Autónoma de Buenos Aires, Argentina
| | - Daniel Prieto
- Hospital General Ramos Mejía, Ciudad Autónoma de Buenos Aires, Argentina
| | | | - Beatriz Solis
- Universidad de Magallanes, Escuela de Medicina, Punta Arenas, Chile
| | - Sara Yusta
- Universidad de Magallanes, Escuela de Medicina, Punta Arenas, Chile
| | | | - Elisa Estenssoro
- Dirección de Investigación, Escuela de Gobierno, Ministerio de Salud de la Provincia de Buenos Aires, Argentina
- Facultad de Ciencias Médicas, Universidad Nacional de La Plata, Buenos Aires, Argentina
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11
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Abbott M, Pereira SM, Sanders N, Girard M, Sankar A, Sklar MC. Weaning from mechanical ventilation in the operating room: a systematic review. Br J Anaesth 2024; 133:424-436. [PMID: 38816331 PMCID: PMC11282496 DOI: 10.1016/j.bja.2024.03.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 02/27/2024] [Accepted: 03/22/2024] [Indexed: 06/01/2024] Open
Abstract
BACKGROUND Postoperative pulmonary complications (PPCs) are associated with postoperative mortality and prolonged hospital stay. Although intraoperative mechanical ventilation (MV) is a risk factor for PPCs, strategies addressing weaning from MV are understudied. In this systematic review, we evaluated weaning strategies and their effects on postoperative pulmonary outcomes. METHODS Our protocol was registered on PROSPERO (CRD42022379145). Eligible studies included randomised controlled trials and observational studies of adults weaned from MV in the operating room. Primary outcomes included atelectasis and oxygenation; secondary outcomes included lung volume changes and PPCs. Risk of bias was assessed using the Cochrane Risk of Bias (RoB2) tool, and quality of evidence with the GRADE framework. RESULTS Screening identified 14 randomised controlled trials including 1719 patients; seven studies were limited to the weaning phase and seven included interventions not restricted to the weaning phase. Strategies combining pressure support ventilation (PSV) with positive end-expiratory pressure (PEEP) and low fraction of inspired oxygen (FiO2) improved atelectasis, oxygenation, and lung volumes. Low FiO2 improved atelectasis and oxygenation but might not improve lung volumes. A fixed-PEEP strategy led to no improvement in oxygenation or atelectasis; however, individualised PEEP with low FiO2 improved oxygenation and might be associated with reduced PPCs. Half of included studies are of moderate or high risk of bias; the overall quality of evidence is low. CONCLUSIONS There is limited research evaluating weaning from intraoperative MV. Based on low-quality evidence, PSV, individualised PEEP, and low FiO2 may be associated with reduced postoperative pulmonary outcomes. SYSTEMATIC REVIEW PROTOCOL PROSPERO (CRD42022379145).
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Affiliation(s)
- Megan Abbott
- Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada; Keenan Research Centre for Biomedical Science, St Michael's Hospital, Toronto, ON, Canada
| | - Sergio M Pereira
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, ON, Canada
| | - Noah Sanders
- Keenan Research Centre for Biomedical Science, St Michael's Hospital, Toronto, ON, Canada
| | - Martin Girard
- Department of Anesthesiology, Centre Hospitalier de l'Université de Montréal, Montreal, QC, Canada; Division of Critical Care, Department of Medicine, Centre Hospitalier de l'Université de Montréal, Montreal, QC, Canada; Department of Anesthesiology, Centre Hospitalier de l'Université de Montréal Research Center, Montreal, QC, Canada
| | - Ashwin Sankar
- Keenan Research Centre for Biomedical Science, St Michael's Hospital, Toronto, ON, Canada; Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, ON, Canada
| | - Michael C Sklar
- Keenan Research Centre for Biomedical Science, St Michael's Hospital, Toronto, ON, Canada; Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, ON, Canada; Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada.
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12
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Sarkar S, Yalla B, Khanna P, Baishya M. Is EIT-guided positive end-expiratory pressure titration for optimizing PEEP in ARDS the white elephant in the room? A systematic review with meta-analysis and trial sequential analysis. J Clin Monit Comput 2024; 38:873-883. [PMID: 38619718 DOI: 10.1007/s10877-024-01158-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Accepted: 03/23/2024] [Indexed: 04/16/2024]
Abstract
Electrical Impedance Tomography (EIT) is a novel real-time lung imaging technology for personalized ventilation adjustments, indicating promising results in animals and humans. The present study aimed to assess its clinical utility for improved ventilation and oxygenation compared to traditional protocols. Comprehensive electronic database screening was done until 30th November, 2023. Randomized controlled trials, controlled clinical trials, comparative cohort studies, and assessments of EIT-guided PEEP titration and conventional methods in adult ARDS patients regarding outcome, ventilatory parameters, and P/F ratio were included. Our search retrieved five controlled cohort studies and two RCTs with 515 patients and overall reduced risk of mortality [RR = 0.68; 95% CI: 0.49 to 0.95; I2 = 0%], better dynamic compliance [MD = 3.46; 95% CI: 1.59 to 5.34; I2 = 0%] with no significant difference in PaO2/FiO2 ratio [MD = 6.5; 95%CI -13.86 to 26.76; I2 = 74%]. The required information size except PaO2/FiO2 was achieved for a power of 95% based on the 50% reduction in risk of mortality, 10% improved compliance as the cumulative Z-score of the said outcomes crossed the alpha spending boundary and did not dip below the inner wedge of futility. EIT-guided individualized PEEP titration is a novel modality; further well-designed studies are needed to substantiate its utility.
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Affiliation(s)
- Soumya Sarkar
- Department of Anaesthesiology, AIIMS, Kalyani, India
| | - Bharat Yalla
- Department of Anaesthesia, Pain Medicine & Critical Care, AIIMS, Ansari Nagar, New Delhi, 110029, India
| | - Puneet Khanna
- Department of Anaesthesia, Pain Medicine & Critical Care, AIIMS, Ansari Nagar, New Delhi, 110029, India.
| | - Madhurjya Baishya
- Department of Anaesthesia, Pain Medicine & Critical Care, AIIMS, Ansari Nagar, New Delhi, 110029, India
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13
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Wang CJ, Wang IT, Chen CH, Tang YH, Lin HW, Lin CY, Wu CL. Recruitment-Potential-Oriented Mechanical Ventilation Protocol and Narrative Review for Patients with Acute Respiratory Distress Syndrome. J Pers Med 2024; 14:779. [PMID: 39201971 PMCID: PMC11355260 DOI: 10.3390/jpm14080779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Revised: 07/04/2024] [Accepted: 07/18/2024] [Indexed: 09/03/2024] Open
Abstract
Even though much progress has been made to improve clinical outcomes, acute respiratory distress syndrome (ARDS) remains a significant cause of acute respiratory failure. Protective mechanical ventilation is the backbone of supportive care for these patients; however, there are still many unresolved issues in its setting. The primary goal of mechanical ventilation is to improve oxygenation and ventilation. The use of positive pressure, especially positive end-expiratory pressure (PEEP), is mandatory in this approach. However, PEEP is a double-edged sword. How to safely set positive end-inspiratory pressure has long been elusive to clinicians. We hereby propose a pressure-volume curve measurement-based method to assess whether injured lungs are recruitable in order to set an appropriate PEEP. For the most severe form of ARDS, extracorporeal membrane oxygenation (ECMO) is considered as the salvage therapy. However, the high level of medical resources required and associated complications make its use in patients with severe ARDS controversial. Our proposed protocol also attempts to propose how to improve patient outcomes by balancing the possible overuse of resources with minimizing patient harm due to dangerous ventilator settings. A recruitment-potential-oriented evaluation-based protocol can effectively stabilize hypoxemic conditions quickly and screen out truly serious patients.
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Affiliation(s)
- Chieh-Jen Wang
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, MacKay Memorial Hospital, Taipei 104217, Taiwan; (C.-Y.L.); (C.-L.W.)
- Department of Medicine, MacKay Medical College, New Taipei City 25245, Taiwan; (I.-T.W.); (Y.-H.T.)
| | - I-Ting Wang
- Department of Medicine, MacKay Medical College, New Taipei City 25245, Taiwan; (I.-T.W.); (Y.-H.T.)
- Department of Critical Care Medicine, MacKay Memorial Hospital, Taipei 104217, Taiwan
| | - Chao-Hsien Chen
- Department of Medicine, MacKay Medical College, New Taipei City 25245, Taiwan; (I.-T.W.); (Y.-H.T.)
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Taitung MacKay Memorial Hospital, Taitung 950408, Taiwan
| | - Yen-Hsiang Tang
- Department of Medicine, MacKay Medical College, New Taipei City 25245, Taiwan; (I.-T.W.); (Y.-H.T.)
- Department of Critical Care Medicine, MacKay Memorial Hospital, Tamsui 251020, Taiwan
| | - Hsin-Wei Lin
- Department of Chest Medicine, Taoyuan General Hospital, Ministry of Health and Welfare, Taoyuan 33004, Taiwan;
| | - Chang-Yi Lin
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, MacKay Memorial Hospital, Taipei 104217, Taiwan; (C.-Y.L.); (C.-L.W.)
- Department of Medicine, MacKay Medical College, New Taipei City 25245, Taiwan; (I.-T.W.); (Y.-H.T.)
| | - Chien-Liang Wu
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, MacKay Memorial Hospital, Taipei 104217, Taiwan; (C.-Y.L.); (C.-L.W.)
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14
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Vanwulpen M, Bouillon A, Cornelis R, Dessers B, Hachimi-Idrissi S. Detecting Intrathoracic Airway Closure during Prehospital Cardiopulmonary Resuscitation Using Quasi-Static Pressure-Volume Curves: A Pilot Study. J Clin Med 2024; 13:4274. [PMID: 39064313 PMCID: PMC11278204 DOI: 10.3390/jcm13144274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2024] [Revised: 07/09/2024] [Accepted: 07/19/2024] [Indexed: 07/28/2024] Open
Abstract
Background: Intrathoracic airway closure frequently occurs during cardiac arrest, possibly impairing ventilation. Previously, capnogram analysis was used to detect this pathophysiological process. In other populations, quasi-static pressure-volume curves obtained during constant low-flow inflations are routinely used to detect intrathoracic airway closure. This study reports the first use of quasi-static pressure-volume curves to detect intrathoracic airway closure during prehospital cardiopulmonary resuscitation. Methods: Connecting a pressure and flow sensor to the endotracheal tube enabled the performance of low-flow inflations during cardiopulmonary resuscitation using a manual resuscitator. Users connected the device following intubation and performed a low-flow inflation during the next rhythm analysis when chest compressions were interrupted. Determining the lower inflection point on the resulting pressure-volume curves allowed for the detection and quantification of intrathoracic airway closure. Results: The research device was used during the prehospital treatment of ten cardiac arrest patients. A lower inflection point indicating intrathoracic airway closure was detected in all patients. During cardiac arrest, the median pressure at which the lower inflection point occurred was 5.56 cmH20 (IQR 4.80, 8.23 cmH20). This value varied considerably between cases and was lower in patients who achieved return of spontaneous circulation. Conclusions: In this pilot study, quasi-static pressure-volume curves were obtained during prehospital cardiopulmonary resuscitation. Intrathoracic airway closure was detected in all patients. Further research is needed to determine whether the use of ventilation strategies to counter intrathoracic airway closure could lead to improved outcomes and if the degree of airway closure could serve as a prognostic factor.
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Affiliation(s)
- Maxim Vanwulpen
- Emergency Department, Ghent University Hospital, Corneel Heymanslaan 10, 9000 Ghent, Belgium (S.H.-I.)
- Faculty of Medicine and Health Sciences, Ghent University, Sint-Pietersnieuwstraat 25, 9000 Ghent, Belgium
| | - Arthur Bouillon
- Faculty of Medicine and Health Sciences, Ghent University, Sint-Pietersnieuwstraat 25, 9000 Ghent, Belgium
| | - Ruben Cornelis
- Faculty of Medicine and Health Sciences, Ghent University, Sint-Pietersnieuwstraat 25, 9000 Ghent, Belgium
| | - Bert Dessers
- Emergency Department, Ghent University Hospital, Corneel Heymanslaan 10, 9000 Ghent, Belgium (S.H.-I.)
- Faculty of Medicine and Health Sciences, Ghent University, Sint-Pietersnieuwstraat 25, 9000 Ghent, Belgium
| | - Saïd Hachimi-Idrissi
- Emergency Department, Ghent University Hospital, Corneel Heymanslaan 10, 9000 Ghent, Belgium (S.H.-I.)
- Faculty of Medicine and Health Sciences, Ghent University, Sint-Pietersnieuwstraat 25, 9000 Ghent, Belgium
- Faculty of Medicine and Pharmacy, Free University Brussels, 1090 Brussels, Belgium
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15
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Murgolo F, Grieco DL, Spadaro S, Bartolomeo N, di Mussi R, Pisani L, Fiorentino M, Crovace AM, Lacitignola L, Staffieri F, Grasso S. Recruitment-to-inflation ratio reflects the impact of peep on dynamic lung strain in a highly recruitable model of ARDS. Ann Intensive Care 2024; 14:106. [PMID: 38963617 PMCID: PMC11224186 DOI: 10.1186/s13613-024-01343-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Accepted: 06/21/2024] [Indexed: 07/05/2024] Open
Abstract
BACKGROUND The recruitment-to-inflation ratio (R/I) has been recently proposed to bedside assess response to PEEP. The impact of PEEP on ventilator-induced lung injury depends on the extent of dynamic strain reduction. We hypothesized that R/I may reflect the potential for lung recruitment (i.e. recruitability) and, consequently, estimate the impact of PEEP on dynamic lung strain, both assessed through computed tomography scan. METHODS Fourteen lung-damaged pigs (lipopolysaccharide infusion) underwent ventilation at low (5 cmH2O) and high PEEP (i.e., PEEP generating a plateau pressure of 28-30 cmH2O). R/I was measured through a one-breath derecruitment maneuver from high to low PEEP. PEEP-induced changes in dynamic lung strain, difference in nonaerated lung tissue weight (tissue recruitment) and amount of gas entering previously nonaerated lung units (gas recruitment) were assessed through computed tomography scan. Tissue and gas recruitment were normalized to the weight and gas volume of previously ventilated lung areas at low PEEP (normalized-tissue recruitment and normalized-gas recruitment, respectively). RESULTS Between high (median [interquartile range] 20 cmH2O [18-21]) and low PEEP, median R/I was 1.08 [0.88-1.82], indicating high lung recruitability. Compared to low PEEP, tissue and gas recruitment at high PEEP were 246 g [182-288] and 385 ml [318-668], respectively. R/I was linearly related to normalized-gas recruitment (r = 0.90; [95% CI 0.71 to 0.97) and normalized-tissue recruitment (r = 0.69; [95% CI 0.25 to 0.89]). Dynamic lung strain was 0.37 [0.29-0.44] at high PEEP and 0.59 [0.46-0.80] at low PEEP (p < 0.001). R/I was significantly related to PEEP-induced reduction in dynamic (r = - 0.93; [95% CI - 0.78 to - 0.98]) and global lung strain (r = - 0.57; [95% CI - 0.05 to - 0.84]). No correlation was found between R/I and and PEEP-induced changes in static lung strain (r = 0.34; [95% CI - 0.23 to 0.74]). CONCLUSIONS In a highly recruitable ARDS model, R/I reflects the potential for lung recruitment and well estimates the extent of PEEP-induced reduction in dynamic lung strain.
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Affiliation(s)
- Francesco Murgolo
- Department of Precision-Regenerative Medicine and Jonic Area (DiMePRe-J), Section of Anesthesiology and Intensive Care Medicine, University of Bari "Aldo Moro", Bari, Italy.
- Dipartimento di Medicina di Precisione e Rigenerativa e Area Jonica (DiMePRe-J), Sezione di Anestesiologia e Rianimazione, Ospedale Policlinico, Università Degli Studi "Aldo Moro", Piazza Giulio Cesare 11, Bari, Italy.
| | - Domenico L Grieco
- Department of Anesthesia, Intensive Care and Emergency, Fondazione Policlinico A. Gemelli IRCCS, Rome, Italy
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy
| | - Savino Spadaro
- Department of Translational Medicine, Section of Anesthesiology and Intensive Care Medicine, University of Ferrara, Ferrara, Italy
| | - Nicola Bartolomeo
- Interdisciplinary Department of Medicine, University of Bari "Aldo Moro", Bari, Italy
| | - Rossella di Mussi
- Department of Precision-Regenerative Medicine and Jonic Area (DiMePRe-J), Section of Anesthesiology and Intensive Care Medicine, University of Bari "Aldo Moro", Bari, Italy
| | - Luigi Pisani
- Department of Precision-Regenerative Medicine and Jonic Area (DiMePRe-J), Section of Anesthesiology and Intensive Care Medicine, University of Bari "Aldo Moro", Bari, Italy
| | - Marco Fiorentino
- Nephrology, Dialysis and Transplantation Unit, Department of Precision and Regenerative Medicine and Ionian Area (DiMePRe-J), University of Bari, Bari, Italy
| | | | - Luca Lacitignola
- Department of Precision-Regenerative Medicine and Jonic Area (DiMePRe-J), Section of Veterinary Medicine, University of Bari "Aldo Moro", Bari, Italy
| | - Francesco Staffieri
- Department of Precision-Regenerative Medicine and Jonic Area (DiMePRe-J), Section of Veterinary Medicine, University of Bari "Aldo Moro", Bari, Italy
| | - Salvatore Grasso
- Department of Precision-Regenerative Medicine and Jonic Area (DiMePRe-J), Section of Anesthesiology and Intensive Care Medicine, University of Bari "Aldo Moro", Bari, Italy
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Xingzheng L, Weiguang G, Quanqiu Y, Huifen Z, Zijun Z, Qiming Z, Suhua Y, Fu Z, Zhigang J. The impact of positive end-expiratory pressure on right ventricular function in patients with moderate-to-severe ARDS: a prospective paired-design study. Front Med (Lausanne) 2024; 11:1424090. [PMID: 39015782 PMCID: PMC11250698 DOI: 10.3389/fmed.2024.1424090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2024] [Accepted: 06/14/2024] [Indexed: 07/18/2024] Open
Abstract
Objective To determine the effects of varying positive end-expiratory pressures (PEEPs) on right ventricular function, hemodynamics, oxygenation, and the incidence of acute cor pulmonale (ACP) in patients with moderate-to-severe acute respiratory distress syndrome (ARDS). Methods This prospective paired-design study involved patients with moderate-to-severe ARDS in the ICU. Participants received lung-protective ventilation and hemodynamic monitoring. During the study, mechanical ventilation was administered with PEEPs of 5 cmH2O, 10 cmH2O, and 15 cmH2O, while maintaining an end-inspiratory plateau pressure ≤ 30 cmH2O. Various assessments, including transthoracic echocardiography, cardiac output measurement, and blood gas analysis, were conducted at baseline and after 1 h of ventilation at each PEEP. Subsequently, variations in ventilation oxygenation, echocardiographic parameters, and hemodynamic indicators under different PEEPs were analyzed to explore the potential effects of PEEP on right ventricular function and hemodynamics, as well as the incidence of ACP. Results A total of 317 ARDS patients were screened. Among them, 104 met the diagnostic criteria for moderate-to-severe ARDS, and 52 completed the study. The baseline PEEP of these 52 participants, acquired before commencement, was 11.5 ± 1.7 cmH2O, and the incidence of ACP was 25.0% (13/52). Intensive care unit mortality, overall hospital mortality, and 28-day mortality rates were 19.2% (10/52), 21.2% (11/52), and 32.7% (17/52), respectively. During the study, ACP incidences at PEEPs of 5 cmH2O, 10 cmH2O, and 15 cmH2O were 17.3% (9/52), 21.2% (11/52), and 38.5% (20/52), respectively. Meanwhile, the PaO2/FiO2 ratio improved with increasing PEEP, reaching 162.0 (140.9, 174.0), 171.0 (144.0, 182.0), and 176.5 (151.0, 196) mmHg at PEEPs of 5 cmH2O, 10 cmH2O, and 15 cmH2O, respectively. In addition, higher PEEPs were associated with a slight increase in PaCO2, showing statistically significant differences compared to moderate and low PEEPs. Compared to a PEEP of 5 cmH2O or 10 cmH2O, right ventricular function exhibited substantial changes at 15 cmH2O PEEP, manifested as increased pulmonary artery systolic pressure, enlarged right ventricular end-diastolic area, and decreased tricuspid annular plane systolic excursion, all with significant differences. Conversely, variations in left ventricular end-diastolic area and ejection fraction were not statistically significant. In terms of hemodynamics, increasing PEEP resulted in a decline in cardiac index (CI), with statistically significant differences between different PEEPs. Specifically, compared to the value at a PEEP of 5 cmH2O, the CI at a PEEP of 15 cmH2O decreased by 14.3% (2.63 [2.20, 2.95] vs. 3.07 [2.69, 3.67], p < 0.001). The decline in the stroke volume index with PEEP was more obvious (22.1 [18.4, 27.1] vs. 27.0 [24.2, 33.0], p < 0.001), reaching 18.1%. Additionally, both end-diastolic volume index and extravascular lung water index decreased significantly with increasing PEEP, while the pulmonary vascular permeability index remained unaffected. Conclusion Different PEEPs can affect the incidence of ACP in patients with moderate-to-severe ARDS. High PEEP improves oxygenation and reduces extravascular lung water without significantly affecting the pulmonary vascular permeability index and left ventricular systolic function. Nevertheless, it can cause right ventricular dilation, as well as substantial declines in right ventricular systolic function and CI, thereby causing ACP.
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Affiliation(s)
- Luo Xingzheng
- Department of Critical Care Medicine, Xiaolan People’s Hospital of Zhongshan, Zhongshan, Guangdong, China
| | - Gu Weiguang
- Department of Critical Care Medicine, Xiaolan People’s Hospital of Zhongshan, Zhongshan, Guangdong, China
| | - Ye Quanqiu
- Department of Critical Care Medicine, Xiaolan People’s Hospital of Zhongshan, Zhongshan, Guangdong, China
| | - Zhou Huifen
- Department of Critical Care Medicine, Xiaolan People’s Hospital of Zhongshan, Zhongshan, Guangdong, China
| | - Zheng Zijun
- Department of Critical Care Medicine, Xiaolan People’s Hospital of Zhongshan, Zhongshan, Guangdong, China
| | - Zou Qiming
- Department of Critical Care Medicine, Xiaolan People’s Hospital of Zhongshan, Zhongshan, Guangdong, China
| | - Yuan Suhua
- Department of Medical Records, Xiaolan People’s Hospital of Zhongshan, Zhongshan, Guangdong, China
| | - Zhang Fu
- Department of Ultrasound, Xiaolan People’s Hospital of Zhongshan, Zhongshan, Guangdong, China
| | - Jian Zhigang
- Department of Critical Care Medicine, Xiaolan People’s Hospital of Zhongshan, Zhongshan, Guangdong, China
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Rosà T, Bongiovanni F, Michi T, Mastropietro C, Menga LS, DE Pascale G, Antonelli M, Grieco DL. Recruitment-to-inflation ratio for bedside PEEP selection in acute respiratory distress syndrome. Minerva Anestesiol 2024; 90:694-706. [PMID: 39021144 DOI: 10.23736/s0375-9393.24.17982-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2024]
Abstract
In acute respiratory distress syndrome, the role of positive end-expiratory pressure (PEEP) to prevent ventilator-induced lung injury is controversial. Randomized trials comparing higher versus lower PEEP strategies failed to demonstrate a clinical benefit. This may depend on the inter-individually variable potential for lung recruitment (i.e. recruitability), which would warrant PEEP individualization to balance alveolar recruitment and the unavoidable baby lung overinflation produced by high pressure. Many techniques have been used to assess recruitability, including lung imaging, multiple pressure-volume curves and lung volume measurement. The Recruitment-to-Inflation ratio (R/I) has been recently proposed to bedside assess recruitability without additional equipment. R/I assessment is a simplified technique based on the multiple pressure-volume curve concept: it is measured by monitoring respiratory mechanics and exhaled tidal volume during a 10-cmH2O one-breath derecruitment maneuver after a short high-PEEP test. R/I scales recruited volume to respiratory system compliance, and normalizes recruitment to a proxy of actual lung size. With modest R/I (<0.3-0.4), setting low PEEP (5-8 cmH2O) may be advisable; with R/I>0.6-0.7, high PEEP (≥15 cmH2O) can be considered, provided that airway and/or transpulmonary plateau pressure do not exceed safety limits. In case of intermediate R/I (≈0.5), a more granular assessment of recruitability may be needed. This could be accomplished with advanced monitoring tools, like sequential lung volume measurement with granular R/I assessment or electrical impedance tomography monitoring during a decremental PEEP trial. In this review, we discuss R/I rationale, applications and limits, providing insights on its clinical use for PEEP selection in moderate-to-severe acute respiratory distress syndrome.
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Affiliation(s)
- Tommaso Rosà
- Department of Emergency, Intensive Care Medicine and Anesthesia, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy
- Institute of Anesthesiology and Resuscitation, Catholic University of the Sacred Heart, Rome, Italy
| | - Filippo Bongiovanni
- Department of Emergency, Intensive Care Medicine and Anesthesia, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy
- Institute of Anesthesiology and Resuscitation, Catholic University of the Sacred Heart, Rome, Italy
| | - Teresa Michi
- Department of Emergency, Intensive Care Medicine and Anesthesia, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy
- Institute of Anesthesiology and Resuscitation, Catholic University of the Sacred Heart, Rome, Italy
| | - Claudia Mastropietro
- Department of Emergency, Intensive Care Medicine and Anesthesia, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy
- Institute of Anesthesiology and Resuscitation, Catholic University of the Sacred Heart, Rome, Italy
| | - Luca S Menga
- Department of Emergency, Intensive Care Medicine and Anesthesia, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy
- Institute of Anesthesiology and Resuscitation, Catholic University of the Sacred Heart, Rome, Italy
| | - Gennaro DE Pascale
- Department of Emergency, Intensive Care Medicine and Anesthesia, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy
- Institute of Anesthesiology and Resuscitation, Catholic University of the Sacred Heart, Rome, Italy
| | - Massimo Antonelli
- Department of Emergency, Intensive Care Medicine and Anesthesia, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy
- Institute of Anesthesiology and Resuscitation, Catholic University of the Sacred Heart, Rome, Italy
| | - Domenico L Grieco
- Department of Emergency, Intensive Care Medicine and Anesthesia, IRCCS A. Gemelli University Polyclinic Foundation, Rome, Italy -
- Institute of Anesthesiology and Resuscitation, Catholic University of the Sacred Heart, Rome, Italy
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Senyei GD, Sagar AES, Tran B, Shah A, Miller R, Patel N, Van Nostrand K, Casal RF, Cheng GZ. Incremental Application of Positive End-Expiratory Pressure for the Evaluation of Atelectasis During RP-EBUS and Bronchoscopy (I-APPEAR). J Bronchology Interv Pulmonol 2024; 31:e0969. [PMID: 38953737 DOI: 10.1097/lbr.0000000000000969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Accepted: 04/09/2024] [Indexed: 07/04/2024]
Abstract
BACKGROUND CT-to-body divergence-described as the difference between preprocedural CT scans and intraprocedural lung architecture-is a significant barrier to improving diagnostic yield during navigational bronchoscopy. A major proposed contributor to CT-to-body divergence is the development of atelectasis, which can confound visualization of peripheral lung lesions via radial probe endobronchial ultrasound (RP-EBUS). High positive end-expiratory pressure (PEEP) ventilatory strategies have been used to decrease atelectasis, allowing the lesion to re-APPEAR on intraprocedure imaging. However, standardized PEEP levels may not be appropriate for all patients due to hemodynamic and ventilatory impacts. METHODS We performed a multicenter, prospective observational study in which patients were imaged with RP-EBUS under general anesthesia to determine if subsegmental atelectasis would resolve as incremental increases in PEEP were applied. Resolution of atelectasis was based on the transition from a non-aerated pattern to an aerated appearance on RP-EBUS. RP-EBUS images were reviewed by 3 experienced operators to determine correlation. RESULTS Forty-three patients underwent RP-EBUS examination following navigational bronchoscopy. Thirty-seven patients underwent incremental PEEP application and subsequent RP-EBUS imaging. Atelectasis was determined to have resolved in 33 patients (88.2%) following increased PEEP. The intraclass correlation coefficient between reviewers was 0.76. A recruitment maneuver was performed in 7 (16.3%) patients after atelectasis persisted at maximal PEEP. Atelectasis was not identified in the examined subsegments in 6 (10.8%) patients despite zero PEEP. CONCLUSION RP-EBUS is an effective tool to monitor what pressure atelectasis within a lung segment has resolved with increasing levels of PEEP.
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Affiliation(s)
- Grant D Senyei
- Division of Pulmonary, Critical Care, and Sleep Medicine, University of California San Diego, La Jolla, CA
- Respiratory Institute, Cleveland Clinic Foundation, Cleveland, OH
| | - Ala Eddin S Sagar
- Department of Medicine, King Faisal Specialist Hospital and Research Centre, Madinah, Saudi Arabia
| | - Brian Tran
- Department of Pulmonary Medicine, Naval Hospital Camp Pendleton, San Diego, CA
| | - Archan Shah
- Banner MD Anderson Cancer Center, Gilbert, AZ
| | - Russell Miller
- Division of Pulmonary, Critical Care, and Sleep Medicine, University of California San Diego, La Jolla, CA
- Department of Pulmonary Medicine, Naval Medical Center San Diego, San Diego, CA
| | - Niral Patel
- Division of Pulmonary, Critical Care, and Sleep Medicine, University of California San Diego, La Jolla, CA
| | - Keriann Van Nostrand
- Division of Pulmonary, Critical Care, and Sleep Medicine, University of California San Diego, La Jolla, CA
| | - Roberto F Casal
- Department of Pulmonary Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX
| | - George Z Cheng
- Division of Pulmonary, Critical Care, and Sleep Medicine, University of California San Diego, La Jolla, CA
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Murali M, Ni M, Karbing DS, Rees SE, Komorowski M, Marshall D, Ramnarayan P, Patel BV. Clinical practice, decision-making, and use of clinical decision support systems in invasive mechanical ventilation: a narrative review. Br J Anaesth 2024; 133:164-177. [PMID: 38637268 PMCID: PMC11213991 DOI: 10.1016/j.bja.2024.03.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 02/29/2024] [Accepted: 03/07/2024] [Indexed: 04/20/2024] Open
Abstract
Invasive mechanical ventilation is a key supportive therapy for patients on intensive care. There is increasing emphasis on personalised ventilation strategies. Clinical decision support systems (CDSS) have been developed to support this. We conducted a narrative review to assess evidence that could inform device implementation. A search was conducted in MEDLINE (Ovid) and EMBASE. Twenty-nine studies met the inclusion criteria. Role allocation is well described, with interprofessional collaboration dependent on culture, nurse:patient ratio, the use of protocols, and perception of responsibility. There were no descriptions of process measures, quality metrics, or clinical workflow. Nurse-led weaning is well-described, with factors grouped by patient, nurse, and system. Physician-led weaning is heterogenous, guided by subjective and objective information, and 'gestalt'. No studies explored decision-making with CDSS. Several explored facilitators and barriers to implementation, grouped by clinician (facilitators: confidence using CDSS, retaining decision-making ownership; barriers: undermining clinician's role, ambiguity moving off protocol), intervention (facilitators: user-friendly interface, ease of workflow integration, minimal training requirement; barriers: increased documentation time), and organisation (facilitators: system-level mandate; barriers: poor communication, inconsistent training, lack of technical support). One study described factors that support CDSS implementation. There are gaps in our understanding of ventilation practice. A coordinated approach grounded in implementation science is required to support CDSS implementation. Future research should describe factors that guide clinical decision-making throughout mechanical ventilation, with and without CDSS, map clinical workflow, and devise implementation toolkits. Novel research design analogous to a learning organisation, that considers the commercial aspects of device design, is required.
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Affiliation(s)
- Mayur Murali
- Division of Anaesthetics, Pain Medicine & Intensive Care, Department of Surgery & Cancer, Faculty of Medicine, Imperial College London, London, UK.
| | - Melody Ni
- NIHR London In Vitro Diagnostics Cooperative, London, UK
| | - Dan S Karbing
- Respiratory and Critical Care Group, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Stephen E Rees
- Respiratory and Critical Care Group, Department of Health Science and Technology, Aalborg University, Aalborg, Denmark
| | - Matthieu Komorowski
- Division of Anaesthetics, Pain Medicine & Intensive Care, Department of Surgery & Cancer, Faculty of Medicine, Imperial College London, London, UK
| | - Dominic Marshall
- Division of Anaesthetics, Pain Medicine & Intensive Care, Department of Surgery & Cancer, Faculty of Medicine, Imperial College London, London, UK
| | - Padmanabhan Ramnarayan
- Division of Anaesthetics, Pain Medicine & Intensive Care, Department of Surgery & Cancer, Faculty of Medicine, Imperial College London, London, UK; Imperial Centre for Paediatrics and Child Health, London, UK
| | - Brijesh V Patel
- Division of Anaesthetics, Pain Medicine & Intensive Care, Department of Surgery & Cancer, Faculty of Medicine, Imperial College London, London, UK; Department of Anaesthesia & Critical Care, Royal Brompton Hospital, London, UK
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Hosseini R, Chen Z, Goligher E, Fan E, Ferguson ND, Harhay MO, Sahetya S, Urner M, Yarnell CJ, Heath A. Designing a Bayesian adaptive clinical trial to evaluate novel mechanical ventilation strategies in acute respiratory failure using integrated nested Laplace approximations. Contemp Clin Trials 2024; 142:107560. [PMID: 38735571 DOI: 10.1016/j.cct.2024.107560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Revised: 04/20/2024] [Accepted: 05/01/2024] [Indexed: 05/14/2024]
Abstract
BACKGROUND Adaptive trials usually require simulations to determine values for design parameters, demonstrate error rates, and establish the sample size. We designed a Bayesian adaptive trial comparing ventilation strategies for patients with acute hypoxemic respiratory failure using simulations. The complexity of the analysis would usually require computationally expensive Markov Chain Monte Carlo methods but this barrier to simulation was overcome using the Integrated Nested Laplace Approximations (INLA) algorithm to provide fast, approximate Bayesian inference. METHODS We simulated two-arm Bayesian adaptive trials with equal randomization that stratified participants into two disease severity states. The analysis used a proportional odds model, fit using INLA. Trials were stopped based on pre-specified posterior probability thresholds for superiority or futility, separately for each state. We calculated the type I error and power across 64 scenarios that varied the probability thresholds and the initial minimum sample size before commencing adaptive analyses. Two designs that maintained a type I error below 5%, a power above 80%, and a feasible mean sample size were evaluated further to determine the optimal design. RESULTS Power generally increased as the initial sample size and the futility threshold increased. The chosen design had an initial recruitment of 500 and a superiority threshold of 0.9925, and futility threshold of 0.95. It maintained high power and was likely to reach a conclusion before exceeding a feasible sample size. CONCLUSIONS We designed a Bayesian adaptive trial to evaluate novel strategies for ventilation using the INLA algorithm to efficiently evaluate a wide range of designs through simulation.
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Affiliation(s)
- Reyhaneh Hosseini
- Child Health Evaluative Sciences, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, ON, Canada
| | - Ziming Chen
- Child Health Evaluative Sciences, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, ON, Canada
| | - Ewan Goligher
- Department of Medicine, Division of Respirology, University Health Network, Toronto, ON, Canada
| | - Eddy Fan
- Department of Medicine, Division of Respirology, University Health Network, Toronto, ON, Canada; Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada; Insititute of Health Policy, Management, and Evaluation, University of Toronto, Toronto, Canada
| | - Niall D Ferguson
- Department of Medicine, Division of Respirology, University Health Network, Toronto, ON, Canada; Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada; Insititute of Health Policy, Management, and Evaluation, University of Toronto, Toronto, Canada
| | - Michael O Harhay
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Sarina Sahetya
- Division of Pulmonary and Critical Care Medicine, Johns Hopkins Hospital, Baltimore, MD, USA
| | - Martin Urner
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Canada; Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
| | - Christopher J Yarnell
- Department of Medicine, Division of Respirology, University Health Network, Toronto, ON, Canada; Insititute of Health Policy, Management, and Evaluation, University of Toronto, Toronto, Canada
| | - Anna Heath
- Child Health Evaluative Sciences, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, ON, Canada; Division of Biostatistics, Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada; Department of Statistical Science, University College London, London, UK.
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Viarasilpa T, Wattananiyom W, Tongyoo S, Naorungroj T, Thomrongpairoj P, Permpikul C. Factors associated with mortality in acute respiratory failure patients without acute respiratory distress syndrome. J Thorac Dis 2024; 16:3574-3582. [PMID: 38983141 PMCID: PMC11228720 DOI: 10.21037/jtd-24-58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Accepted: 04/26/2024] [Indexed: 07/11/2024]
Abstract
Background Excess tidal volume and driving pressure were associated with increased mortality in patients with acute respiratory distress syndrome (ARDS). Still, the appropriate mechanical ventilation strategy for patients who do not have ARDS needs to be understood. This study aimed to identify risk factors for mortality in acute respiratory failure patients without ARDS. Methods We included all mechanically ventilated patients who did not meet the criteria for ARDS and were admitted to the medical intensive care unit (ICU) from October 2017 to September 2018. Patients who had tracheostomy before admission, were intubated for more than 24 hours before transfer to ICU, or underwent extracorporeal membrane oxygenation within 24 hours of ICU admission were excluded. Clinical and physiologic data were recorded and compared between survived and non-survived patients. Results Of 289 patients with acute respiratory failure, 134 patients without ARDS were included; 69 (51%) died within 28 days. Demographics, principal diagnosis, and lung injury score on the first day of admission were not significantly different between survived and non-survived patients. In multivariate analysis, higher peak inspiratory pressure (PIP) during the first 3 days of admission [odds ratio (OR) 1.11, 95% confidence interval (CI): 1.01-1.22, P=0.04], higher sequential organ failure assessment score (OR 1.15, 95% CI: 1.04-1.28, P=0.008) and underlying cerebrovascular diseases (OR 7.09, 95% CI: 1.78-28.28, P=0.006) were independently associated with mortality in these patients, whereas dynamic lung compliance (Cdyn) and respiratory rate were not associated with mortality in the multivariate model. Conclusions Mortality was high in mechanically ventilated patients without ARDS. Higher PIP is a potentially modifiable risk factor for mortality in these patients, independent of the baseline Cdyn. Underlying cerebrovascular diseases and increased disease severity are also independent factors associated with 28-day mortality.
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Affiliation(s)
- Tanuwong Viarasilpa
- Division of Critical Care, Department of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Watsamon Wattananiyom
- Division of Critical Care, Department of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Surat Tongyoo
- Division of Critical Care, Department of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Thummaporn Naorungroj
- Division of Critical Care, Department of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Preecha Thomrongpairoj
- Division of Critical Care, Department of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Chairat Permpikul
- Division of Critical Care, Department of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
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22
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Spinelli E, Mauri T. Alveolar Collapse as a Threat to Mechanically Ventilated Lungs. Am J Respir Crit Care Med 2024; 209:1418-1420. [PMID: 38546274 PMCID: PMC11208958 DOI: 10.1164/rccm.202402-0326ed] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2024] Open
Affiliation(s)
- Elena Spinelli
- Department of Anesthesia, Critical Care and Emergency IRCCS Foundation "Ca' Granda", "Maggiore Policlinico" Hospital Milan, Italy
| | - Tommaso Mauri
- Department of Anesthesia, Critical Care and Emergency IRCCS Foundation "Ca' Granda", "Maggiore Policlinico" Hospital Milan, Italy
- Department of Pathophysiology and Transplantation University of Milan Milan, Italy
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Teixeira C, Rosa RG. Unmasking the hidden aftermath: postintensive care unit sequelae, discharge preparedness, and long-term follow-up. CRITICAL CARE SCIENCE 2024; 36:e20240265en. [PMID: 38896724 PMCID: PMC11152445 DOI: 10.62675/2965-2774.20240265-en] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 01/03/2024] [Indexed: 06/21/2024]
Abstract
A significant portion of individuals who have experienced critical illness encounter new or exacerbated impairments in their physical, cognitive, or mental health, commonly referred to as postintensive care syndrome. Moreover, those who survive critical illness often face an increased risk of adverse consequences, including infections, major cardiovascular events, readmissions, and elevated mortality rates, during the months following hospitalization. These findings emphasize the critical necessity for effective prevention and management of long-term health deterioration in the critical care environment. Although conclusive evidence from well-designed randomized clinical trials is somewhat limited, potential interventions include strategies such as limiting sedation, early mobilization, maintaining family presence during the intensive care unit stay, implementing multicomponent transition programs (from intensive care unit to ward and from hospital to home), and offering specialized posthospital discharge follow-up. This review seeks to provide a concise summary of recent medical literature concerning long-term outcomes following critical illness and highlight potential approaches for preventing and addressing health decline in critical care survivors.
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Affiliation(s)
- Cassiano Teixeira
- Department of Internal MedicineUniversidade Federal de Ciências da Saúde de Porto AlegrePorto AlegreRSBrazilDepartment of Internal Medicine, Universidade Federal de Ciências da Saúde de Porto Alegre - Porto Alegre (RS), Brazil.
| | - Regis Goulart Rosa
- Department of Internal MedicineHospital Moinhos de VentoPorto AlegreRSBrazilDepartment of Internal Medicine, Hospital Moinhos de Vento - Porto Alegre (RS), Brazil.
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24
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Costa ELV, Alcala GC, Tucci MR, Goligher E, Morais CC, Dianti J, Nakamura MAP, Oliveira LB, Pereira SM, Toufen C, Barbas CSV, Carvalho CRR, Amato MBP. Impact of extended lung protection during mechanical ventilation on lung recovery in patients with COVID-19 ARDS: a phase II randomized controlled trial. Ann Intensive Care 2024; 14:85. [PMID: 38849605 PMCID: PMC11161454 DOI: 10.1186/s13613-024-01297-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Accepted: 04/15/2024] [Indexed: 06/09/2024] Open
Abstract
BACKGROUND Protective ventilation seems crucial during early Acute Respiratory Distress Syndrome (ARDS), but the optimal duration of lung protection remains undefined. High driving pressures (ΔP) and excessive patient ventilatory drive may hinder lung recovery, resulting in self-inflicted lung injury. The hidden nature of the ΔP generated by patient effort complicates the situation further. Our study aimed to assess the feasibility of an extended lung protection strategy that includes a stepwise protocol to control the patient ventilatory drive, assessing its impact on lung recovery. METHODS We conducted a single-center randomized study on patients with moderate/severe COVID-19-ARDS with low respiratory system compliance (CRS < 0.6 (mL/Kg)/cmH2O). The intervention group received a ventilation strategy guided by Electrical Impedance Tomography aimed at minimizing ΔP and patient ventilatory drive. The control group received the ARDSNet low-PEEP strategy. The primary outcome was the modified lung injury score (mLIS), a composite measure that integrated daily measurements of CRS, along with oxygen requirements, oxygenation, and X-rays up to day 28. The mLIS score was also hierarchically adjusted for survival and extubation rates. RESULTS The study ended prematurely after three consecutive months without patient enrollment, attributed to the pandemic subsiding. The intention-to-treat analysis included 76 patients, with 37 randomized to the intervention group. The average mLIS score up to 28 days was not different between groups (P = 0.95, primary outcome). However, the intervention group showed a faster improvement in the mLIS (1.4 vs. 7.2 days to reach 63% of maximum improvement; P < 0.001), driven by oxygenation and sustained improvement of X-ray (P = 0.001). The intervention group demonstrated a sustained increase in CRS up to day 28 (P = 0.009) and also experienced a shorter time from randomization to room-air breathing (P = 0.02). Survival at 28 days and time until liberation from the ventilator were not different between groups. CONCLUSIONS The implementation of an individualized PEEP strategy alongside extended lung protection appears viable. Promising secondary outcomes suggested a faster lung recovery, endorsing further examination of this strategy in a larger trial. Clinical trial registration This trial was registered with ClinicalTrials.gov (number NCT04497454) on August 04, 2020.
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Affiliation(s)
- Eduardo L V Costa
- Laboratório de Pneumologia LIM-09, Faculdade de Medicina, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, 455 Dr Arnaldo Ave, Room 2144, São Paulo, SP, Brazil
- Research and Education Institute, Hospital Sírio-Libanes, Sao Paulo, Brazil
- Divisao de Pneumologia, Faculdade de Medicina, Instituto do Coracao, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, São Paulo, SP, Brasil
| | - Glasiele C Alcala
- Laboratório de Pneumologia LIM-09, Faculdade de Medicina, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, 455 Dr Arnaldo Ave, Room 2144, São Paulo, SP, Brazil
- Divisao de Pneumologia, Faculdade de Medicina, Instituto do Coracao, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, São Paulo, SP, Brasil
| | - Mauro R Tucci
- Divisao de Pneumologia, Faculdade de Medicina, Instituto do Coracao, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, São Paulo, SP, Brasil
| | - Ewan Goligher
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Keenan Research Centre, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada
- Toronto General Hospital Research Institute, Toronto, Canada
| | - Caio C Morais
- Laboratório de Pneumologia LIM-09, Faculdade de Medicina, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, 455 Dr Arnaldo Ave, Room 2144, São Paulo, SP, Brazil
- Departamento de Fisioterapia, Universidade Federal de Pernambuco, Recife, PE, Brazil
| | - Jose Dianti
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Keenan Research Centre, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada
- Toronto General Hospital Research Institute, Toronto, Canada
| | - Miyuki A P Nakamura
- Laboratório de Pneumologia LIM-09, Faculdade de Medicina, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, 455 Dr Arnaldo Ave, Room 2144, São Paulo, SP, Brazil
| | - Larissa B Oliveira
- Divisao de Pneumologia, Faculdade de Medicina, Instituto do Coracao, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, São Paulo, SP, Brasil
| | - Sérgio M Pereira
- Laboratório de Pneumologia LIM-09, Faculdade de Medicina, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, 455 Dr Arnaldo Ave, Room 2144, São Paulo, SP, Brazil
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Keenan Research Centre, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada
| | - Carlos Toufen
- Divisao de Pneumologia, Faculdade de Medicina, Instituto do Coracao, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, São Paulo, SP, Brasil
| | - Carmen S V Barbas
- Divisao de Pneumologia, Faculdade de Medicina, Instituto do Coracao, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, São Paulo, SP, Brasil
- Adult ICU Albert Einstein Hospital, São Paulo, Brazil
| | - Carlos R R Carvalho
- Laboratório de Pneumologia LIM-09, Faculdade de Medicina, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, 455 Dr Arnaldo Ave, Room 2144, São Paulo, SP, Brazil
- Divisao de Pneumologia, Faculdade de Medicina, Instituto do Coracao, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, São Paulo, SP, Brasil
| | - Marcelo B P Amato
- Laboratório de Pneumologia LIM-09, Faculdade de Medicina, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, 455 Dr Arnaldo Ave, Room 2144, São Paulo, SP, Brazil.
- Divisao de Pneumologia, Faculdade de Medicina, Instituto do Coracao, Hospital das Clinicas HCFMUSP, Universidade de Sao Paulo, São Paulo, SP, Brasil.
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Montini L, Antonelli M. Precision Medicine Approach in ARDS: A New Challenge. Chest 2024:S0012-3692(24)00680-9. [PMID: 38838954 DOI: 10.1016/j.chest.2024.05.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Accepted: 05/20/2024] [Indexed: 06/07/2024] Open
Affiliation(s)
- Luca Montini
- Department of Anesthesiology Intensive Care and Emergency Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy.
| | - Massimo Antonelli
- Department of Anesthesiology Intensive Care and Emergency Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy
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26
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Placenti A, Fratebianchi F. Mean airway pressure as a parameter of lung-protective and heart-protective ventilation. REVISTA ESPANOLA DE ANESTESIOLOGIA Y REANIMACION 2024; 71:466-478. [PMID: 38615712 DOI: 10.1016/j.redare.2024.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 01/30/2024] [Indexed: 04/16/2024]
Abstract
Mean airway pressure (MAP) is the mean pressure generated in the airway during a single breath (inspiration + expiration), and is displayed on most anaesthesia and intensive care ventilators. This parameter, however, is not usually monitored during mechanical ventilation because it is poorly understood and usually only used in research. One of the main determinants of MAP is PEEP. This is because in respiratory cycles with an I:E ratio of 1:2, expiration is twice as long as inspiration. Although MAP can be used as a surrogate for mean alveolar pressure, these parameters differ considerably in some situations. Recently, MAP has been shown to be a useful prognostic factor for respiratory morbidity and mortality in mechanically ventilated patients of various ages. Low MAP has been associated with a lower incidence of 90-day mortality, shorter ICU stay, and shorter mechanical ventilation time. MAP also affects haemodynamics: there is evidence of a causal relationship between high MAP and low perfusion index, both of which are associated with poor prognosis in mechanically ventilated patients. Elevated MAP values have also been associated with high central venous pressure and lactate, which are indicative of ventilator-associated right ventricular failure and tissue hypoperfusion, respectively. MAP, therefore, is an important parameter to measure in clinical practice. The aim of this review has been to identify the determinants of MAP, the pros and cons of using MAP instead of traditional protective ventilation parameters, and the evidence that supports the use of MAP in clinical practice.
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Affiliation(s)
- A Placenti
- División de Anestesia, Analgesia y Reanimación, Hospital de Clínicas "José de San Martín", Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina.
| | - F Fratebianchi
- División de Anestesia, Analgesia y Reanimación, Hospital de Clínicas "José de San Martín", Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
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27
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Iwata H, Yoshida T, Hoshino T, Aiyama Y, Maezawa T, Hashimoto H, Koyama Y, Yamada T, Fujino Y. Electrical Impedance Tomography-based Ventilation Patterns in Patients after Major Surgery. Am J Respir Crit Care Med 2024; 209:1328-1337. [PMID: 38346178 DOI: 10.1164/rccm.202309-1658oc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 02/12/2024] [Indexed: 06/01/2024] Open
Abstract
Rationale: General anesthesia and mechanical ventilation have negative impacts on the respiratory system, causing heterogeneous distribution of lung aeration, but little is known about the ventilation patterns of postoperative patients and their association with clinical outcomes. Objectives: To clarify the phenotypes of ventilation patterns along a gravitational direction after surgery by using electrical impedance tomography (EIT) and to evaluate their association with postoperative pulmonary complications (PPCs) and other relevant clinical outcomes. Methods: Adult postoperative patients at high risk for PPCs, receiving mechanical ventilation on ICU admission (N = 128), were prospectively enrolled between November 18, 2021 and July 18, 2022. PPCs were prospectively scored until hospital discharge, and their association with phenotypes of ventilation patterns was studied. The secondary outcomes were the times to wean from mechanical ventilation and oxygen use and the length of ICU stay. Measurements and Main Results: Three phenotypes of ventilation patterns were revealed by EIT: phenotype 1 (32% [n = 41], a predominance of ventral ventilation), phenotype 2 (41% [n = 52], homogeneous ventilation), and phenotype 3 (27% [n = 35], a predominance of dorsal ventilation). The median PPC score was higher in phenotype 1 and phenotype 3 than in phenotype 2. The median time to wean from mechanical ventilation was longer in phenotype 1 versus phenotype 2. The median duration of ICU stay was longer in phenotype 1 versus phenotype 2. The median time to wean from oxygen use was longer in phenotype 1 and phenotype 3 than in phenotype 2. Conclusions: Inhomogeneous ventilation patterns revealed by EIT on ICU admission were associated with PPCs, delayed weaning from mechanical ventilation and oxygen use, and a longer ICU stay.
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Affiliation(s)
- Hirofumi Iwata
- Department of Anesthesiology and Intensive Care Medicine, Osaka University Graduate School of Medicine, Suita, Japan; and
| | - Takeshi Yoshida
- Department of Anesthesiology and Intensive Care Medicine, Osaka University Graduate School of Medicine, Suita, Japan; and
| | - Taiki Hoshino
- Department of Anesthesiology and Intensive Care Medicine, Osaka University Graduate School of Medicine, Suita, Japan; and
| | - Yuki Aiyama
- Department of Anesthesiology and Intensive Care Medicine, Osaka University Graduate School of Medicine, Suita, Japan; and
| | - Takashi Maezawa
- Department of Anesthesiology and Intensive Care Medicine, Osaka University Graduate School of Medicine, Suita, Japan; and
| | - Haruka Hashimoto
- Department of Anesthesiology and Intensive Care Medicine, Osaka University Graduate School of Medicine, Suita, Japan; and
| | - Yukiko Koyama
- Department of Anesthesiology and Intensive Care Medicine, Osaka University Graduate School of Medicine, Suita, Japan; and
| | - Tomomi Yamada
- The Department of Medical Innovation Data Coordinating Center, Osaka University Hospital, Suita, Japan
| | - Yuji Fujino
- Department of Anesthesiology and Intensive Care Medicine, Osaka University Graduate School of Medicine, Suita, Japan; and
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28
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Serafini SC, van Meenen DMP, Pisani L, Neto AS, Ball L, de Abreu MG, Algera AG, Azevedo L, Bellani G, Dondorp AM, Fan E, Laffey JG, Pham T, Tschernko EM, Schultz MJ, van der Woude MCE. Different ventilation intensities among various categories of patients ventilated for reasons other than ARDS--A pooled analysis of 4 observational studies. J Crit Care 2024; 81:154531. [PMID: 38341938 DOI: 10.1016/j.jcrc.2024.154531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 01/23/2024] [Accepted: 01/30/2024] [Indexed: 02/13/2024]
Abstract
PURPOSE We investigated driving pressure (ΔP) and mechanical power (MP) and associations with clinical outcomes in critically ill patients ventilated for reasons other than ARDS. MATERIALS AND METHODS Individual patient data analysis of a pooled database that included patients from four observational studies of ventilation. ΔP and MP were compared among invasively ventilated non-ARDS patients with sepsis, with pneumonia, and not having sepsis or pneumonia. The primary endpoint was ΔP; secondary endpoints included MP, ICU mortality and length of stay, and duration of ventilation. RESULTS This analysis included 372 (11%) sepsis patients, 944 (28%) pneumonia patients, and 2040 (61%) patients ventilated for any other reason. On day 1, median ΔP was higher in sepsis (14 [11-18] cmH2O) and pneumonia patients (14 [11-18]cmH2O), as compared to patients not having sepsis or pneumonia (13 [10-16] cmH2O) (P < 0.001). Median MP was also higher in sepsis and pneumonia patients. ΔP, as opposed to MP, was associated with ICU mortality in sepsis and pneumonia patients. CONCLUSIONS The intensity of ventilation differed between patients with sepsis or pneumonia and patients receiving ventilation for any other reason; ΔP was associated with higher mortality in sepsis and pneumonia patients. REGISTRATION This post hoc analysis was not registered; the individual studies that were merged into the used database were registered at clinicaltrials.gov: NCT01268410 (ERICC), NCT02010073 (LUNG SAFE), NCT01868321 (PRoVENT), and NCT03188770 (PRoVENT-iMiC).
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Affiliation(s)
- Simon Corrado Serafini
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genova, Italy; Department of Intensive Care, Amsterdam UMC, location 'AMC', Amsterdam, the Netherlands.
| | - David M P van Meenen
- Department of Intensive Care, Amsterdam UMC, location 'AMC', Amsterdam, the Netherlands; Department of Anesthesiology, Amsterdam UMC, location 'AMC', Amsterdam, the Netherlands
| | - Luigi Pisani
- Department of Intensive Care, Amsterdam UMC, location 'AMC', Amsterdam, the Netherlands; Section of Operational Research, Doctors with Africa, Padova, Italy; Department of Anesthesiology and Intensive Care Medicine, Miulli Regional Hospital, Acquaviva delle Fonti, Italy; Mahidol-Oxford Research Unit (MORU), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Ary Serpa Neto
- Australian and New Zealand Intensive Care Research Centre (ANZIC-RC), School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia; Department of Critical Care, Melbourne Medical School, University of Melbourne, Austin Hospital, Melbourne, Australia; Department of Critical Care Medicine, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
| | - Lorenzo Ball
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genova, Italy; Anesthesia and Intensive Care, Ospedale Policlinico San Martino, IRCCS per l'Oncologia e le Neuroscienze, Genova, Italy
| | - Marcelo Gama de Abreu
- Department of Intensive Care and Resuscitation, Anesthesiology Institute, Cleveland Clinic, Cleveland, OH, USA; Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Anna Geke Algera
- Department of Intensive Care, Amsterdam UMC, location 'AMC', Amsterdam, the Netherlands
| | - Luciano Azevedo
- Department of Critical Care Medicine, Hospital Israelita Albert Einstein, Sao Paulo, Brazil; Department of Emergency Medicine, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Giacomo Bellani
- Centro Interdipartimentale di Scienze Mediche (CISMed), Università di Trento, Italy; UOC anesthesia and Intensive Care 1, Ospedale Santa Chiara, APSS, Trento, Italy
| | - Arjen M Dondorp
- Mahidol-Oxford Research Unit (MORU), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand; Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Eddy Fan
- Interdepartmental Division of Critical Care Medicine, Institute of Health Policy, Management and Evaluation, University of Toronto, Ontario, Canada
| | - John G Laffey
- Anaesthesia and Intensive Care Medicine, School of Medicine, National University of Ireland, and Galway University Hospitals Ireland, Galway, Ireland
| | - Tai Pham
- Equipe d'Epidémiologie Respiratoire integrative, Université Paris-Saclay, Paris, France; Department of Intensive Care, Hôpital de Bicêtre, Paris, France
| | - Edda M Tschernko
- Clinical Department of Cardiothoracic Vascular Surgery Anesthesia and Intensive Care Medicine, Medical University Wien, Vienna, Austria
| | - Marcus J Schultz
- Department of Intensive Care, Amsterdam UMC, location 'AMC', Amsterdam, the Netherlands; Mahidol-Oxford Research Unit (MORU), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand; Nuffield Department of Medicine, University of Oxford, Oxford, UK; Clinical Department of Cardiothoracic Vascular Surgery Anesthesia and Intensive Care Medicine, Medical University Wien, Vienna, Austria
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Meng L, Rasmussen M, Abcejo AS, Meng DM, Tong C, Liu H. Causes of Perioperative Cardiac Arrest: Mnemonic, Classification, Monitoring, and Actions. Anesth Analg 2024; 138:1215-1232. [PMID: 37788395 DOI: 10.1213/ane.0000000000006664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Perioperative cardiac arrest (POCA) is a catastrophic complication that requires immediate recognition and correction of the underlying cause to improve patient outcomes. While the hypoxia, hypovolemia, hydrogen ions (acidosis), hypo-/hyperkalemia, and hypothermia (Hs) and toxins, tamponade (cardiac), tension pneumothorax, thrombosis (pulmonary), and thrombosis (coronary) (Ts) mnemonic is a valuable tool for rapid differential diagnosis, it does not cover all possible causes leading to POCA. To address this limitation, we propose using the preload-contractility-afterload-rate and rhythm (PCARR) construct to categorize POCA, which is comprehensive, systemic, and physiologically logical. We provide evidence for each component in the PCARR construct and emphasize that it complements the Hs and Ts mnemonic rather than replacing it. Furthermore, we discuss the significance of utilizing monitored variables such as electrocardiography, pulse oxygen saturation, end-tidal carbon dioxide, and blood pressure to identify clues to the underlying cause of POCA. To aid in investigating POCA causes, we suggest the Anesthetic care, Surgery, Echocardiography, Relevant Check and History (A-SERCH) list of actions. We recommend combining the Hs and Ts mnemonic, the PCARR construct, monitoring, and the A-SERCH list of actions in a rational manner to investigate POCA causes. These proposals require real-world testing to assess their feasibility.
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Affiliation(s)
- Lingzhong Meng
- From the Department of Anesthesia, Indiana University School of Medicine, Indianapolis, Indiana
| | - Mads Rasmussen
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic College of Medicine, Rochester, Minnesota
| | - Arnoley S Abcejo
- Department of Anesthesiology, Section of Neuroanesthesia, Aarhus University Hospital, Aarhus, Denmark
| | - Deyi M Meng
- Choate Rosemary Hall School, Wallingford, Connecticut
| | - Chuanyao Tong
- Department of Anesthesiology, Wake Forest University, Winston-Salem, North Carolina
| | - Hong Liu
- Department of Anesthesiology and Pain Medicine, University of California Davis, Sacramento, California
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30
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Bello G, Giammatteo V, Bisanti A, Delle Cese L, Rosà T, Menga LS, Montini L, Michi T, Spinazzola G, De Pascale G, Pennisi MA, Ribeiro De Santis Santiago R, Berra L, Antonelli M, Grieco DL. High vs Low PEEP in Patients With ARDS Exhibiting Intense Inspiratory Effort During Assisted Ventilation: A Randomized Crossover Trial. Chest 2024; 165:1392-1405. [PMID: 38295949 DOI: 10.1016/j.chest.2024.01.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 01/21/2024] [Accepted: 01/23/2024] [Indexed: 02/26/2024] Open
Abstract
BACKGROUND Positive end-expiratory pressure (PEEP) can potentially modulate inspiratory effort (ΔPes), which is the major determinant of self-inflicted lung injury. RESEARCH QUESTION Does high PEEP reduce ΔPes in patients with moderate-to-severe ARDS on assisted ventilation? STUDY DESIGN AND METHODS Sixteen patients with Pao2/Fio2 ≤ 200 mm Hg and ΔPes ≥ 10 cm H2O underwent a randomized sequence of four ventilator settings: PEEP = 5 cm H2O or PEEP = 15 cm H2O + synchronous (pressure support ventilation [PSV]) or asynchronous (pressure-controlled intermittent mandatory ventilation [PC-IMV]) inspiratory assistance. ΔPes and respiratory system, lung, and chest wall mechanics were assessed with esophageal manometry and occlusions. PEEP-induced alveolar recruitment and overinflation, lung dynamic strain, and tidal volume distribution were assessed with electrical impedance tomography. RESULTS ΔPes was not systematically different at high vs low PEEP (pressure support ventilation: median, 20 cm H2O; interquartile range (IQR), 15-24 cm H2O vs median, 15 cm H2O; IQR, 13-23 cm H2O; P = .24; pressure-controlled intermittent mandatory ventilation: median, 20; IQR, 18-23 vs median, 19; IQR, 17-25; P = .67, respectively). Similarly, respiratory system and transpulmonary driving pressures, tidal volume, lung/chest wall mechanics, and pendelluft extent were not different between study phases. High PEEP resulted in lower or higher ΔPes, respiratory system driving pressure, and transpulmonary driving pressure according to whether this increased or decreased respiratory system compliance (r = -0.85, P < .001; r = -0.75, P < .001; r = -0.80, P < .001, respectively). PEEP-induced changes in respiratory system compliance were driven by its lung component and were dependent on the extent of PEEP-induced alveolar overinflation (r = -0.66, P = .006). High PEEP caused variable recruitment and systematic redistribution of tidal volume toward dorsal lung regions, thereby reducing dynamic strain in ventral areas (pressure support ventilation: median, 0.49; IQR, 0.37-0.83 vs median, 0.96; IQR, 0.62-1.56; P = .003; pressure-controlled intermittent mandatory ventilation: median, 0.65; IQR, 0.42-1.31 vs median, 1.14; IQR, 0.79-1.52; P = .002). All results were consistent during synchronous and asynchronous inspiratory assistance. INTERPRETATION The impact of high PEEP on ΔPes and lung stress is interindividually variable according to different effects on the respiratory system and lung compliance resulting from alveolar overinflation. High PEEP may help mitigate the risk of self-inflicted lung injury solely if it increases lung/respiratory system compliance. TRIAL REGISTRATION ClinicalTrials.gov; No.: NCT04241874; URL: www. CLINICALTRIALS gov.
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Affiliation(s)
- Giuseppe Bello
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS; Rome, Italy; Istituto di Anestesiologia e Rianimazione, Università Cattolica del Sacro Cuore Rome, Italy
| | - Valentina Giammatteo
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS; Rome, Italy; Istituto di Anestesiologia e Rianimazione, Università Cattolica del Sacro Cuore Rome, Italy; Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Harvard University, Boston, MA
| | - Alessandra Bisanti
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS; Rome, Italy; Istituto di Anestesiologia e Rianimazione, Università Cattolica del Sacro Cuore Rome, Italy
| | - Luca Delle Cese
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS; Rome, Italy; Istituto di Anestesiologia e Rianimazione, Università Cattolica del Sacro Cuore Rome, Italy
| | - Tommaso Rosà
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS; Rome, Italy; Istituto di Anestesiologia e Rianimazione, Università Cattolica del Sacro Cuore Rome, Italy
| | - Luca S Menga
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS; Rome, Italy; Istituto di Anestesiologia e Rianimazione, Università Cattolica del Sacro Cuore Rome, Italy
| | - Luca Montini
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS; Rome, Italy; Istituto di Anestesiologia e Rianimazione, Università Cattolica del Sacro Cuore Rome, Italy
| | - Teresa Michi
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS; Rome, Italy; Istituto di Anestesiologia e Rianimazione, Università Cattolica del Sacro Cuore Rome, Italy
| | - Giorgia Spinazzola
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS; Rome, Italy; Istituto di Anestesiologia e Rianimazione, Università Cattolica del Sacro Cuore Rome, Italy
| | - Gennaro De Pascale
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS; Rome, Italy; Istituto di Anestesiologia e Rianimazione, Università Cattolica del Sacro Cuore Rome, Italy
| | - Mariano Alberto Pennisi
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS; Rome, Italy; Istituto di Anestesiologia e Rianimazione, Università Cattolica del Sacro Cuore Rome, Italy
| | - Roberta Ribeiro De Santis Santiago
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Harvard University, Boston, MA
| | - Lorenzo Berra
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Harvard University, Boston, MA
| | - Massimo Antonelli
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS; Rome, Italy; Istituto di Anestesiologia e Rianimazione, Università Cattolica del Sacro Cuore Rome, Italy
| | - Domenico Luca Grieco
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS; Rome, Italy; Istituto di Anestesiologia e Rianimazione, Università Cattolica del Sacro Cuore Rome, Italy.
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31
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Gattinoni L. Definitions, guidelines and opinions: the white, the black and the grey. Intensive Care Med 2024; 50:934-936. [PMID: 38709290 PMCID: PMC11164778 DOI: 10.1007/s00134-024-07410-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Accepted: 03/23/2024] [Indexed: 05/07/2024]
Affiliation(s)
- Luciano Gattinoni
- Department of Anesthesiology, University Medical Centre Göttingen, Robert Koch Straβe 40, 37075, Göttingen, Germany.
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Jackson R, Kim A, Moroz N, Damiani LF, Grieco DL, Piraino T, Friedrich JO, Mercat A, Telias I, Brochard LJ. Reverse triggering ? a novel or previously missed phenomenon? Ann Intensive Care 2024; 14:78. [PMID: 38776032 PMCID: PMC11111438 DOI: 10.1186/s13613-024-01303-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Accepted: 04/27/2024] [Indexed: 05/25/2024] Open
Abstract
BACKGROUND Reverse triggering (RT) was described in 2013 as a form of patient-ventilator asynchrony, where patient's respiratory effort follows mechanical insufflation. Diagnosis requires esophageal pressure (Pes) or diaphragmatic electrical activity (EAdi), but RT can also be diagnosed using standard ventilator waveforms. HYPOTHESIS We wondered (1) how frequently RT would be present but undetected in the figures from literature, especially before 2013; (2) whether it would be more prevalent in the era of small tidal volumes after 2000. METHODS We searched PubMed, EMBASE, and the Cochrane Central Register of Controlled Trials, from 1950 to 2017, with key words related to asynchrony to identify papers with figures including ventilator waveforms expected to display RT if present. Experts labelled waveforms. 'Definite' RT was identified when Pes or EAdi were in the tracing, and 'possible' RT when only flow and pressure waveforms were present. Expert assessment was compared to the author's descriptions of waveforms. RESULTS We found 65 appropriate papers published from 1977 to now, containing 181 ventilator waveforms. 21 cases of 'possible' RT and 25 cases of 'definite' RT were identified by the experts. 18.8% of waveforms prior to 2013 had evidence of RT. Most cases were published after 2000 (1 before vs. 45 after, p = 0.03). 54% of RT cases were attributed to different phenomena. A few cases of identified RT were already described prior to 2013 using different terminology (earliest in 1997). While RT cases attributed to different phenomena decreased after 2013, 60% of 'possible' RT remained missed. CONCLUSION RT has been present in the literature as early as 1997, but most cases were found after the introduction of low tidal volume ventilation in 2000. Following 2013, the number of undetected cases decreased, but RT are still commonly missed. Reverse Triggering, A Missed Phenomenon in the Literature. Critical Care Canada Forum 2019 Abstracts. Can J Anesth/J Can Anesth 67 (Suppl 1), 1-162 (2020). https://doi-org.myaccess.library.utoronto.ca/ https://doi.org/10.1007/s12630-019-01552-z .
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Affiliation(s)
- Robert Jackson
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute and St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
| | - Audery Kim
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute and St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
| | - Nikolay Moroz
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute and St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Department of Respiratory Therapy, McGill University Health Centre, Montreal, QC, Canada
| | - L Felipe Damiani
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute and St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
- Departamento Ciencias de la Salud, Carrera de Kinesiología, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Domenico Luca Grieco
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute and St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Anesthesia, Italy
- Emergency and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Thomas Piraino
- Department of Anesthesia, Division of Critical Care, McMaster University, Hamilton, ON, Canada
| | - Jan O Friedrich
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute and St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
| | - Alain Mercat
- Medical ICU and Vent'Lab, University Hospital of Angers, University of Angers, 4 Rue Larrey, Angers Cedex 9, 49933, France
| | - Irene Telias
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute and St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
| | - Laurent J Brochard
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute and St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada.
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada.
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33
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Schwartz EA, Chow B, Bronshteyn YS, Young CC. Ventilator Stress Index: An Intensive Care Unit Tool That Anesthesiologists Should Know. J Cardiothorac Vasc Anesth 2024:S1053-0770(24)00348-3. [PMID: 38918098 DOI: 10.1053/j.jvca.2024.05.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Accepted: 05/16/2024] [Indexed: 06/27/2024]
Affiliation(s)
- Evan A Schwartz
- Division of Pulmonary, Allergy, and Critical Care, Duke University Medical Center, Durham, NC; Department of Internal Medicine, Duke University Medical Center, Durham, NC.
| | - Bryan Chow
- Department of Internal Medicine, Duke University Medical Center, Durham, NC; Division of Adult Cardiothoracic Anesthesiology, Duke University Medical Center, Durham, NC; Department of Anesthesiology, Duke University Medical Center, Durham, NC
| | - Yuriy S Bronshteyn
- Department of Internal Medicine, Duke University Medical Center, Durham, NC; Department of Anesthesiology, Duke University Medical Center, Durham, NC; Duke University School of Medicine, Durham, NC; Durham VA Health Care System, Durham, NC
| | - Christopher C Young
- Department of Internal Medicine, Duke University Medical Center, Durham, NC; Department of Anesthesiology, Duke University Medical Center, Durham, NC; Division of Adult Critical Care Anesthesia, Duke University Medical Center, Durham, NC
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34
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Maia IS, Medrado FA, Tramujas L, Tomazini BM, Oliveira JS, Sady ERR, Barbante LG, Nicola ML, Gurgel RM, Damiani LP, Negrelli KL, Miranda TA, Santucci E, Valeis N, Laranjeira LN, Westphal GA, Fernandes RP, Zandonai CL, Pincelli MP, Figueiredo RC, Bustamante CLS, Norbin LF, Boschi E, Lessa R, Romano MP, Miura MC, de Alencar MS, Dantas VCDS, Barreto PA, Hernandes ME, Grion CMC, Laranjeira AS, Mezzaroba AL, Bahl M, Starke AC, Biondi RS, Dal-Pizzol F, Caser EB, Thompson MM, Padial AA, Veiga VC, Leite RT, Araújo G, Guimarães M, Martins PDA, Lacerda FH, Hoffmann CR, Melro L, Pacheco E, Ospina-Táscon GA, Ferreira JC, Freires FJC, Machado FR, Cavalcanti AB, Zampieri FG. Prospective, randomized, controlled trial assessing the effects of a driving pressure-limiting strategy for patients with acute respiratory distress syndrome due to community-acquired pneumonia (STAMINA trial): protocol and statistical analysis plan. CRITICAL CARE SCIENCE 2024; 36:e20240210en. [PMID: 38775567 PMCID: PMC11098077 DOI: 10.62675/2965-2774.20240210-en] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Accepted: 01/12/2024] [Indexed: 05/25/2024]
Abstract
BACKGROUND Driving pressure has been suggested to be the main driver of ventilator-induced lung injury and mortality in observational studies of acute respiratory distress syndrome. Whether a driving pressure-limiting strategy can improve clinical outcomes is unclear. OBJECTIVE To describe the protocol and statistical analysis plan that will be used to test whether a driving pressure-limiting strategy including positive end-expiratory pressure titration according to the best respiratory compliance and reduction in tidal volume is superior to a standard strategy involving the use of the ARDSNet low-positive end-expiratory pressure table in terms of increasing the number of ventilator-free days in patients with acute respiratory distress syndrome due to community-acquired pneumonia. METHODS The ventilator STrAtegy for coMmunIty acquired pNeumoniA (STAMINA) study is a randomized, multicenter, open-label trial that compares a driving pressure-limiting strategy to the ARDSnet low-positive end-expiratory pressure table in patients with moderate-to-severe acute respiratory distress syndrome due to community-acquired pneumonia admitted to intensive care units. We expect to recruit 500 patients from 20 Brazilian and 2 Colombian intensive care units. They will be randomized to a driving pressure-limiting strategy group or to a standard strategy using the ARDSNet low-positive end-expiratory pressure table. In the driving pressure-limiting strategy group, positive end-expiratory pressure will be titrated according to the best respiratory system compliance. OUTCOMES The primary outcome is the number of ventilator-free days within 28 days. The secondary outcomes are in-hospital and intensive care unit mortality and the need for rescue therapies such as extracorporeal life support, recruitment maneuvers and inhaled nitric oxide. CONCLUSION STAMINA is designed to provide evidence on whether a driving pressure-limiting strategy is superior to the ARDSNet low-positive end-expiratory pressure table strategy for increasing the number of ventilator-free days within 28 days in patients with moderate-to-severe acute respiratory distress syndrome. Here, we describe the rationale, design and status of the trial.
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Affiliation(s)
- STAMINA Study Group Investigators
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
- Universidade de São PauloDepartment of Anesthesiology, Pain, and Intensive CareSão PauloSPBrazilDepartment of Anesthesiology, Pain, and Intensive Care, Universidade de São Paulo - São Paulo (SP), Brazil.
- Brazilian Research in Intensive Care NetworkSão PauloSPBrazilBrazilian Research in Intensive Care Network (BRICNet) - São Paulo (SP), Brazil.
- Centro Hospitalar Unimed JoinvilleJoinvilleSCBrazilCentro Hospitalar Unimed Joinville - Joinville (SC), Brazil.
- Hospital Nereu RamosFlorianópolisSCBrazilHospital Nereu Ramos - Florianópolis (SC), Brazil.
- Hospital e Maternidade São JoséColatinaESBrazilHospital e Maternidade São José - Colatina (ES), Brazil.
- Linhares Medical CenterLinharesESBrazilLinhares Medical Center - Linhares (ES), Brazil.
- Hospital Geral de Caxias do SulCaxias do SulRSBrazilHospital Geral de Caxias do Sul - Caxias do Sul (RS), Brazil.
- Hcor-Hospital do CoraçãoSão PauloSPBrazilHcor-Hospital do Coração - São Paulo (SP), Brazil.
- Hospital São Vicente de PauloBarbalhaCEBrazilHospital São Vicente de Paulo - Barbalha (CE), Brazil.
- Hospital Marcílio DiasRio de JaneiroRJBrazilHospital Marcílio Dias - Rio de Janeiro (RJ), Brazil.
- Santa Casa de VotuporangaVotuporangaSPBrazilSanta Casa de Votuporanga - Votuporanga (SP), Brazil.
- Universidade Estadual de LondrinaHospital UniversitárioLondrinaPRBrazilHospital Universitário, Universidade Estadual de Londrina - Londrina (PR), Brazil.
- Hospital Araucária de LondrinaLondrinaPRBrazilHospital Araucária de Londrina - Londrina (PR), Brazil.
- Universidade Federal de Santa CatarinaHospital UniversitárioFlorianópolisSCBrazilHospital Universitário, Universidade Federal de Santa Catarina - Florianópolis (SC), Brazil.
- Hospital BrasíliaBrasíliaDFBrazilHospital Brasília - Brasília (DF), Brazil.
- Hospital São JoséCriciúmaSCBrazilHospital São José - Criciúma (SC), Brazil.
- Hospital Unimed VitóriaVitóriaSCBrazilHospital Unimed Vitória - Vitória (SC), Brazil.
- Hospital Evangélico de Cachoeiro de ItapemirimCachoeiro de ItapemirimESBrazilHospital Evangélico de Cachoeiro de Itapemirim - Cachoeiro de Itapemirim (ES), Brazil.
- Instituto Baía SulFlorianópolisSCBrazilInstituto Baía Sul - Florianópolis (SC), Brazil.
- BP - A Beneficência Portuguesa de São PauloSão PauloSPBrazilBP - A Beneficência Portuguesa de São Paulo - São Paulo (SP), Brazil.
- Imperial Hospital de CaridadeFlorianópolisSCBrazilImperial Hospital de Caridade - Florianópolis (SC), Brazil.
- Santa Casa de Misericórdia de BarretosBarretosSPBrazilSanta Casa de Misericórdia de Barretos - Barretos (SP), Brazil.
- Hospital Estadual Dr. Jayme Santos NevesSerraESBrazilHospital Estadual Dr. Jayme Santos Neves - Serra (ES), Brazil.
- Hospital OtoclínicaFortalezaCEBrazilHospital Otoclínica - Fortaleza (CE), Brazil.
- Hospital Regional Hans Dieter SchmidtJoinvilleSCBrazilHospital Regional Hans Dieter Schmidt - Joinville (SC), Brazil.
- Hospital SamaritanoSão PauloSPBrazilHospital Samaritano, São Paulo (SP), Brazil.
- Hospital SepacoSão PauloSPBrazilHospital Sepaco - São Paulo (SP), Brazil.
- Universidad ICESIFundación Valle del LiliColombiaCOFundación Valle del Lili - Universidad ICESI - Colombia, CO.
- Universidade de São PauloHospital das ClínicasDepartment of PneumologySão PauloSPBrazilDepartment of Pneumology, Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo - São Paulo (SP), Brazil.
- Universidade Federal de São PauloDepartment of Anesthesiology, Pain, and Intensive CareSão PauloSPBrazilDepartment of Anesthesiology, Pain, and Intensive Care, Universidade Federal de São Paulo - São Paulo (SP), Brazil.
- University of Alberta and Alberta Health Services - EdmontonFaculty of Medicine and DentistryDepartment of Critical Care MedicineAlbertaCanadaDepartment of Critical Care Medicine, Faculty of Medicine and Dentistry, University of Alberta and Alberta Health Services - Edmonton, Alberta, Canada.
| | - Israel Silva Maia
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
- Universidade de São PauloDepartment of Anesthesiology, Pain, and Intensive CareSão PauloSPBrazilDepartment of Anesthesiology, Pain, and Intensive Care, Universidade de São Paulo - São Paulo (SP), Brazil.
- Brazilian Research in Intensive Care NetworkSão PauloSPBrazilBrazilian Research in Intensive Care Network (BRICNet) - São Paulo (SP), Brazil.
| | - Fernando Azevedo Medrado
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
| | - Lucas Tramujas
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
| | - Bruno Martins Tomazini
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
- Brazilian Research in Intensive Care NetworkSão PauloSPBrazilBrazilian Research in Intensive Care Network (BRICNet) - São Paulo (SP), Brazil.
| | - Júlia Souza Oliveira
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
| | - Erica Regina Ribeiro Sady
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
| | - Letícia Galvão Barbante
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
| | - Marina Lazzari Nicola
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
| | - Rodrigo Magalhães Gurgel
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
| | - Lucas Petri Damiani
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
| | - Karina Leal Negrelli
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
| | - Tamiris Abait Miranda
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
| | - Eliana Santucci
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
| | - Nanci Valeis
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
| | - Ligia Nasi Laranjeira
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
| | - Glauco Adrieno Westphal
- Centro Hospitalar Unimed JoinvilleJoinvilleSCBrazilCentro Hospitalar Unimed Joinville - Joinville (SC), Brazil.
| | - Ruthy Perotto Fernandes
- Centro Hospitalar Unimed JoinvilleJoinvilleSCBrazilCentro Hospitalar Unimed Joinville - Joinville (SC), Brazil.
| | - Cássio Luis Zandonai
- Hospital Nereu RamosFlorianópolisSCBrazilHospital Nereu Ramos - Florianópolis (SC), Brazil.
| | | | - Rodrigo Cruvinel Figueiredo
- Hospital e Maternidade São JoséColatinaESBrazilHospital e Maternidade São José - Colatina (ES), Brazil.
- Linhares Medical CenterLinharesESBrazilLinhares Medical Center - Linhares (ES), Brazil.
| | | | - Luiz Fernando Norbin
- Linhares Medical CenterLinharesESBrazilLinhares Medical Center - Linhares (ES), Brazil.
| | - Emerson Boschi
- Hospital Geral de Caxias do SulCaxias do SulRSBrazilHospital Geral de Caxias do Sul - Caxias do Sul (RS), Brazil.
| | - Rafael Lessa
- Hospital Geral de Caxias do SulCaxias do SulRSBrazilHospital Geral de Caxias do Sul - Caxias do Sul (RS), Brazil.
| | - Marcelo Pereira Romano
- Hcor-Hospital do CoraçãoSão PauloSPBrazilHcor-Hospital do Coração - São Paulo (SP), Brazil.
| | - Mieko Cláudia Miura
- Hcor-Hospital do CoraçãoSão PauloSPBrazilHcor-Hospital do Coração - São Paulo (SP), Brazil.
| | - Meton Soares de Alencar
- Hospital São Vicente de PauloBarbalhaCEBrazilHospital São Vicente de Paulo - Barbalha (CE), Brazil.
| | | | - Priscilla Alves Barreto
- Hospital Marcílio DiasRio de JaneiroRJBrazilHospital Marcílio Dias - Rio de Janeiro (RJ), Brazil.
| | - Mauro Esteves Hernandes
- Santa Casa de VotuporangaVotuporangaSPBrazilSanta Casa de Votuporanga - Votuporanga (SP), Brazil.
| | - Cintia Magalhães Carvalho Grion
- Universidade Estadual de LondrinaHospital UniversitárioLondrinaPRBrazilHospital Universitário, Universidade Estadual de Londrina - Londrina (PR), Brazil.
- Hospital Araucária de LondrinaLondrinaPRBrazilHospital Araucária de Londrina - Londrina (PR), Brazil.
| | - Alexandre Sanches Laranjeira
- Universidade Estadual de LondrinaHospital UniversitárioLondrinaPRBrazilHospital Universitário, Universidade Estadual de Londrina - Londrina (PR), Brazil.
| | - Ana Luiza Mezzaroba
- Hospital Araucária de LondrinaLondrinaPRBrazilHospital Araucária de Londrina - Londrina (PR), Brazil.
| | - Marina Bahl
- Universidade Federal de Santa CatarinaHospital UniversitárioFlorianópolisSCBrazilHospital Universitário, Universidade Federal de Santa Catarina - Florianópolis (SC), Brazil.
| | - Ana Carolina Starke
- Universidade Federal de Santa CatarinaHospital UniversitárioFlorianópolisSCBrazilHospital Universitário, Universidade Federal de Santa Catarina - Florianópolis (SC), Brazil.
| | - Rodrigo Santos Biondi
- Brazilian Research in Intensive Care NetworkSão PauloSPBrazilBrazilian Research in Intensive Care Network (BRICNet) - São Paulo (SP), Brazil.
- Hospital BrasíliaBrasíliaDFBrazilHospital Brasília - Brasília (DF), Brazil.
| | - Felipe Dal-Pizzol
- Hospital São JoséCriciúmaSCBrazilHospital São José - Criciúma (SC), Brazil.
| | | | - Marlus Muri Thompson
- Hospital Evangélico de Cachoeiro de ItapemirimCachoeiro de ItapemirimESBrazilHospital Evangélico de Cachoeiro de Itapemirim - Cachoeiro de Itapemirim (ES), Brazil.
| | | | - Viviane Cordeiro Veiga
- Brazilian Research in Intensive Care NetworkSão PauloSPBrazilBrazilian Research in Intensive Care Network (BRICNet) - São Paulo (SP), Brazil.
- BP - A Beneficência Portuguesa de São PauloSão PauloSPBrazilBP - A Beneficência Portuguesa de São Paulo - São Paulo (SP), Brazil.
| | - Rodrigo Thot Leite
- BP - A Beneficência Portuguesa de São PauloSão PauloSPBrazilBP - A Beneficência Portuguesa de São Paulo - São Paulo (SP), Brazil.
| | - Gustavo Araújo
- Imperial Hospital de CaridadeFlorianópolisSCBrazilImperial Hospital de Caridade - Florianópolis (SC), Brazil.
| | - Mário Guimarães
- Santa Casa de Misericórdia de BarretosBarretosSPBrazilSanta Casa de Misericórdia de Barretos - Barretos (SP), Brazil.
| | - Priscilla de Aquino Martins
- Hospital Estadual Dr. Jayme Santos NevesSerraESBrazilHospital Estadual Dr. Jayme Santos Neves - Serra (ES), Brazil.
| | | | - Conrado Roberto Hoffmann
- Hospital Regional Hans Dieter SchmidtJoinvilleSCBrazilHospital Regional Hans Dieter Schmidt - Joinville (SC), Brazil.
| | - Livia Melro
- Hospital SamaritanoSão PauloSPBrazilHospital Samaritano, São Paulo (SP), Brazil.
| | - Eduardo Pacheco
- Hospital SepacoSão PauloSPBrazilHospital Sepaco - São Paulo (SP), Brazil.
| | | | - Juliana Carvalho Ferreira
- Brazilian Research in Intensive Care NetworkSão PauloSPBrazilBrazilian Research in Intensive Care Network (BRICNet) - São Paulo (SP), Brazil.
- Universidade de São PauloHospital das ClínicasDepartment of PneumologySão PauloSPBrazilDepartment of Pneumology, Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo - São Paulo (SP), Brazil.
| | - Fabricio Jocundo Calado Freires
- Universidade Federal de São PauloDepartment of Anesthesiology, Pain, and Intensive CareSão PauloSPBrazilDepartment of Anesthesiology, Pain, and Intensive Care, Universidade Federal de São Paulo - São Paulo (SP), Brazil.
| | - Flávia Ribeiro Machado
- Brazilian Research in Intensive Care NetworkSão PauloSPBrazilBrazilian Research in Intensive Care Network (BRICNet) - São Paulo (SP), Brazil.
- Universidade Federal de São PauloDepartment of Anesthesiology, Pain, and Intensive CareSão PauloSPBrazilDepartment of Anesthesiology, Pain, and Intensive Care, Universidade Federal de São Paulo - São Paulo (SP), Brazil.
| | - Alexandre Biasi Cavalcanti
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
- Universidade de São PauloDepartment of Anesthesiology, Pain, and Intensive CareSão PauloSPBrazilDepartment of Anesthesiology, Pain, and Intensive Care, Universidade de São Paulo - São Paulo (SP), Brazil.
- Brazilian Research in Intensive Care NetworkSão PauloSPBrazilBrazilian Research in Intensive Care Network (BRICNet) - São Paulo (SP), Brazil.
| | - Fernando Godinho Zampieri
- Hcor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, Hcor-Hospital do Coração - São Paulo (SP), Brazil.
- Brazilian Research in Intensive Care NetworkSão PauloSPBrazilBrazilian Research in Intensive Care Network (BRICNet) - São Paulo (SP), Brazil.
- University of Alberta and Alberta Health Services - EdmontonFaculty of Medicine and DentistryDepartment of Critical Care MedicineAlbertaCanadaDepartment of Critical Care Medicine, Faculty of Medicine and Dentistry, University of Alberta and Alberta Health Services - Edmonton, Alberta, Canada.
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35
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Siuba MT, Bulgarelli L, Duggal A, Cavalcanti AB, Zampieri FG, Rey DA, Lucena WDR, Maia IS, Paisani DM, Laranjeira LN, Neto AS, Deliberato RO. Differential Effect of Positive End-Expiratory Pressure Strategies in Patients With ARDS: A Bayesian Analysis of Clinical Subphenotypes. Chest 2024:S0012-3692(24)00630-5. [PMID: 38768777 DOI: 10.1016/j.chest.2024.04.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 03/22/2024] [Accepted: 04/06/2024] [Indexed: 05/22/2024] Open
Abstract
BACKGROUND ARDS is a heterogeneous condition with two subphenotypes identified by different methodologies. Our group similarly identified two ARDS subphenotypes using nine routinely available clinical variables. However, whether these are associated with differential response to treatment has yet to be explored. RESEARCH QUESTION Are there differential responses to positive end-expiratory pressure (PEEP) strategies on 28-day mortality according to subphenotypes in adult patients with ARDS? STUDY DESIGN AND METHODS We evaluated data from two prior ARDS trials (Higher vs Lower Positive End-Expiratory Pressures in Patients With the ARDS [ALVEOLI] and the Alveolar Recruitment in ARDS Trial [ART]) that compared different PEEP strategies. We classified patients into one of two subphenotypes as described previously. We assessed the differential effect of PEEP with a Bayesian hierarchical logistic model for the primary outcome of 28-day mortality. RESULTS We analyzed data from 1,559 patients with ARDS. Compared with lower PEEP, a higher PEEP strategy resulted in higher 28-day mortality in patients with subphenotype A disease in the ALVEOLI study (OR, 1.61; 95% credible interval [CrI], 0.90-2.94) and ART (OR, 1.73; 95% CrI, 1.01-2.98), with a probability of harm resulting from higher PEEP in this subphenotype of 94.3% and 97.7% in the ALVEOLI and ART studies, respectively. Higher PEEP was not associated with mortality in patients with subphenotype B disease in each trial (OR, 0.95 [95% CrI, 0.51-1.73] and 1.00 [95% CrI, 0.63-1.55], respectively), with probability of benefit of 56.4% and 50.7% in the ALVEOLI and ART studies, respectively. These effects were not modified by Pao2 to Fio2 ratio, driving pressure, or the severity of illness for the cohorts. INTERPRETATION We found evidence of differential response to PEEP strategies across two ARDS subphenotypes, suggesting possible harm with a higher PEEP strategy in one subphenotype. These observations may assist with predictive enrichment in future clinical trials.
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Affiliation(s)
- Matthew T Siuba
- Department of Critical Care Medicine, Respiratory Institute, Cleveland Clinic, Cleveland, OH.
| | - Lucas Bulgarelli
- Division of Biomedical Informatics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH
| | - Abhijit Duggal
- Department of Critical Care Medicine, Respiratory Institute, Cleveland Clinic, Cleveland, OH
| | | | | | | | | | | | | | | | - Ary Serpa Neto
- Department of Critical Care Medicine, Hospital Israelita Albert Einstein, São Paulo, Brazil; Australian and New Zealand Intensive Care Research Centre, School of Public Health and Preventive Medicine, Monash University, Melbourne, VIC, Australia; Department of Critical Care, Melbourne Medical School, University of Melbourne, Austin Hospital, Melbourne, VIC, Australia; Department of Intensive Care, Austin Hospital, Melbourne, VIC, Australia
| | - Rodrigo Octávio Deliberato
- Division of Biomedical Informatics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH; Department of Biostatistics, Health Informatics and Data Science (BHIDS), University of Cincinnati College of Medicine, Cincinnati, OH
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36
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Bruhn A, Kattan E, Cavalcanti AB. Challenges and limitations of using ventilator-free days as an outcome in critical care trials. CRITICAL CARE SCIENCE 2024; 36:e20240088en. [PMID: 38747817 PMCID: PMC11098069 DOI: 10.62675/2965-2774.20240088-en] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Accepted: 03/14/2024] [Indexed: 05/18/2024]
Affiliation(s)
- Alejandro Bruhn
- Pontificia Universidad Católica de ChileFacultad de MedicinaDepartment of Intensive MedicineSantiagoChileDepartment of Intensive Medicine, Facultad de Medicina, Pontificia Universidad Católica de Chile - Santiago, Chile.
| | - Eduardo Kattan
- Pontificia Universidad Católica de ChileFacultad de MedicinaDepartment of Intensive MedicineSantiagoChileDepartment of Intensive Medicine, Facultad de Medicina, Pontificia Universidad Católica de Chile - Santiago, Chile.
| | - Alexandre Biasi Cavalcanti
- HCor-Hospital do CoraçãoResearch InstituteSão PauloSPBrazilResearch Institute, HCor-Hospital do Coração - São Paulo (SP), Brazil.
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Wang Z, Zhou Y, Zhu M, Wang F, Zhou Y, Yu H, Luo F. Prone positioning does not improve outcomes of intubated patients with pneumocystis pneumonia and moderate-severe acute respiratory distress syndrome: a single-center, retrospective, observational, cohort study. Eur J Med Res 2024; 29:267. [PMID: 38698478 PMCID: PMC11067229 DOI: 10.1186/s40001-024-01868-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 04/24/2024] [Indexed: 05/05/2024] Open
Abstract
BACKGROUND Pneumocystis pneumonia is an uncommon precipitant of acute respiratory distress syndrome and is associated with high mortality. Prone positioning ventilation has been proven to reduce mortality in patients with moderate-severe acute respiratory distress syndrome. We investigated the effect of prone positioning on oxygenation and mortality in intubated patients with pneumocystis pneumonia comorbid with moderate-severe acute respiratory distress syndrome. METHODS In this single-center, retrospective, observational, cohort study, eligible patients were enrolled at West China Hospital of Sichuan University from January 1, 2017, to December 31, 2021. Data on demographics, clinical features, ventilation parameters, arterial blood gas, and outcomes were collected. Patients were assigned to the prone cohort or supine cohort according to whether they received prone positioning ventilation. The main outcome was 28-day mortality. FINDINGS A total of 79 patients were included in the study. Sixty-three patients were enrolled in the prone cohort, and 16 patients were enrolled in the supine cohort. The 28-day mortality was 61.9% in the prone cohort and 68.8% in the supine cohort (P = 0.26), and 90-day mortality was 66.7% in the prone cohort and 68.8% in the supine cohort (P = 0.55). Patients in the supine cohort had fewer invasive mechanical ventilation days and more ventilator-free days. The incidence of complications was higher in the prone cohort than in the supine cohort. CONCLUSIONS In patients with pneumocystis pneumonia and moderate-severe acute respiratory distress syndrome, prone positioning did not decrease 28-day or 90-day mortality. Trial registration ClinicalTrials.gov number, ChiCTR2200063889. Registered on 20 September 2022, https://www.chictr.org.cn/showproj.html?proj=174886 .
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Affiliation(s)
- Zhen Wang
- Department of Respiratory Care, Sichuan University West China Hospital, Chengdu, Sichuan, China
- State Key Laboratory of Respiratory Health and Multimorbidity, West China hospital, Sichuan University, Chengdu, China
| | - Yuyan Zhou
- Department of Respiratory Care, Sichuan University West China Hospital, Chengdu, Sichuan, China
| | - Min Zhu
- State Key Laboratory of Respiratory Health and Multimorbidity, West China hospital, Sichuan University, Chengdu, China
- Department of Pulmonary and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, China, 610041
- Laboratory of Pulmonary Immunology and Inflammation, Department of Respiratory and Critical Care Medicine, Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - Faping Wang
- State Key Laboratory of Respiratory Health and Multimorbidity, West China hospital, Sichuan University, Chengdu, China
- Department of Pulmonary and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, China, 610041
- Laboratory of Pulmonary Immunology and Inflammation, Department of Respiratory and Critical Care Medicine, Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China
| | - Yubei Zhou
- State Key Laboratory of Respiratory Health and Multimorbidity, West China hospital, Sichuan University, Chengdu, China
- Department of Pulmonary and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, China, 610041
| | - He Yu
- Department of Respiratory Care, Sichuan University West China Hospital, Chengdu, Sichuan, China
- State Key Laboratory of Respiratory Health and Multimorbidity, West China hospital, Sichuan University, Chengdu, China
| | - Fengming Luo
- State Key Laboratory of Respiratory Health and Multimorbidity, West China hospital, Sichuan University, Chengdu, China.
- Department of Pulmonary and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, China, 610041.
- Laboratory of Pulmonary Immunology and Inflammation, Department of Respiratory and Critical Care Medicine, Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China.
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38
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Tsonas AM, van Meenen DM, Botta M, Shrestha GS, Roca O, Paulus F, Neto AS, Schultz MJ. Hyperoxemia in invasively ventilated COVID-19 patients-Insights from the PRoVENT-COVID study. Pulmonology 2024; 30:272-281. [PMID: 36274046 PMCID: PMC10155497 DOI: 10.1016/j.pulmoe.2022.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 08/29/2022] [Accepted: 09/01/2022] [Indexed: 12/16/2022] Open
Abstract
OBJECTIVE We determined the prevalences of hyperoxemia and excessive oxygen use, and the epidemiology, ventilation characteristics and outcomes associated with hyperoxemia in invasively ventilated patients with coronavirus disease 2019 (COVID-19). METHODS Post hoc analysis of a national, multicentre, observational study in 22 ICUs. Patients were classified in the first two days of invasive ventilation as 'hyperoxemic' or 'normoxemic'. The co-primary endpoints were prevalence of hyperoxemia (PaO2 > 90 mmHg) and prevalence of excessive oxygen use (FiO2 ≥ 60% while PaO2 > 90 mmHg or SpO2 > 92%). Secondary endpoints included ventilator settings and ventilation parameters, duration of ventilation, length of stay (LOS) in ICU and hospital, and mortality in ICU, hospital, and at day 28 and 90. We used propensity matching to control for observed confounding factors that may influence endpoints. RESULTS Of 851 COVID-19 patients, 225 (26.4%) were classified as hyperoxemic. Excessive oxygen use occurred in 385 (45.2%) patients. Acute respiratory distress syndrome (ARDS) severity was lowest in hyperoxemic patients. Hyperoxemic patients were ventilated with higher positive end-expiratory pressure (PEEP), while rescue therapies for hypoxemia were applied more often in normoxemic patients. Neither in the unmatched nor in the matched analysis were there differences between hyperoxemic and normoxemic patients with regard to any of the clinical outcomes. CONCLUSION In this cohort of invasively ventilated COVID-19 patients, hyperoxemia occurred often and so did excessive oxygen use. The main differences between hyperoxemic and normoxemic patients were ARDS severity and use of PEEP. Clinical outcomes were not different between hyperoxemic and normoxemic patients.
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Affiliation(s)
- A M Tsonas
- Department of Intensive Care, Amsterdam UMC, location 'AMC', Amsterdam, The Netherlands.
| | - D M van Meenen
- Department of Intensive Care, Amsterdam UMC, location 'AMC', Amsterdam, The Netherlands
| | - M Botta
- Department of Intensive Care, Amsterdam UMC, location 'AMC', Amsterdam, The Netherlands
| | - G S Shrestha
- Department of Critical Care Medicine, Tribhuvan University Teaching Hospital, Maharajgunj, Kathmandu, Nepal
| | - O Roca
- Department of Intensive Care, Vall d'Hebron Univerity Hospital, Barcelona, Spain; Ciber Enfermedades Respiratorias (CibeRes), Instituto de Salud Carlos III, Madrid, Spain
| | - F Paulus
- Department of Intensive Care, Amsterdam UMC, location 'AMC', Amsterdam, The Netherlands; ACHIEVE, Centre of Applied Research, Amsterdam University of Applied Sciences, Faculty of Health, Amsterdam, The Netherlands
| | - A S Neto
- Department of Intensive Care, Amsterdam UMC, location 'AMC', Amsterdam, The Netherlands; Australian and New Zealand Intensive Care Research Centre (ANZIC-RC), Monash University, Melbourne, Australia; Data Analytics Research and Evaluation (DARE) Centre, Austin Hospital, Melbourne, Australia; Department of Critical Care Medicine, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
| | - M J Schultz
- Department of Intensive Care, Amsterdam UMC, location 'AMC', Amsterdam, The Netherlands; Department of Critical Care Medicine, Mahidol University, Bangkok, Thailand; Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
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Florio G, Zanella A, Slobod D, Guzzardella A, Protti I, Carlesso E, Canakoglu A, Fumagalli J, Scaravilli V, Colombo SM, Caccioppola A, Brioni M, Pesenti AM, Grasselli G. Impact of Positive End-Expiratory Pressure and FiO 2 on Lung Mechanics and Intrapulmonary Shunt in Mechanically Ventilated Patients with ARDS Due to COVID-19 Pneumonia. J Intensive Care Med 2024; 39:420-428. [PMID: 37926984 DOI: 10.1177/08850666231210485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2023]
Abstract
Purpose: This study aimed to investigate the effects of inspired oxygen fraction (FiO2) and positive end-expiratory pressure (PEEP) on gas exchange in mechanically ventilated patients with COVID-19. Methods: Two FiO2 (100%, 40%) were tested at 3 decreasing levels of PEEP (15, 10, and 5 cmH2O). At each FiO2 and PEEP, gas exchange, respiratory mechanics, hemodynamics, and the distribution of ventilation and perfusion were assessed with electrical impedance tomography. The impact of FiO2 on the intrapulmonary shunt (delta shunt) was analyzed as the difference between the calculated shunt at FiO2 100% (shunt) and venous admixture at FiO2 40% (venous admixture). Results: Fourteen patients were studied. Decreasing PEEP from 15 to 10 cmH2O did not change shunt (24 [21-28] vs 27 [24-29]%) or venous admixture (18 [15-26] vs 23 [18-34]%) while partial pressure of arterial oxygen (FiO2 100%) was higher at PEEP 15 (262 [198-338] vs 256 [147-315] mmHg; P < .05). Instead when PEEP was decreased from 10 to 5 cmH2O, shunt increased to 36 [30-39]% (P < .05) and venous admixture increased to 33 [30-43]% (P < .05) and partial pressure of arterial oxygen (100%) decreased to 109 [76-177] mmHg (P < .05). At PEEP 15, administration of 100% FiO2 resulted in a shunt greater than venous admixture at 40% FiO2, ((24 [21-28] vs 18 [15-26]%, P = .005), delta shunt 5.5% (2.3-8.8)). Compared to PEEP 10, PEEP of 5 and 15 cmH2O resulted in decreased global and pixel-level compliance. Cardiac output at FiO2 100% resulted higher at PEEP 5 (5.4 [4.4-6.5]) compared to PEEP 10 (4.8 [4.1-5.5], P < .05) and PEEP 15 cmH2O (4.7 [4.5-5.4], P < .05). Conclusion: In this study, PEEP of 15 cmH2O, despite resulting in the highest oxygenation, was associated with overdistension. PEEP of 5 cmH2O was associated with increased shunt and alveolar collapse. Administration of 100% FiO2 was associated with an increase in intrapulmonary shunt in the setting of high PEEP. Trial registration: NCT05132933.
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Affiliation(s)
- Gaetano Florio
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
- Department of Anesthesia, Critical Care and Emergency, Fondazione Istituto di Ricovero e cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Alberto Zanella
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
- Department of Anesthesia, Critical Care and Emergency, Fondazione Istituto di Ricovero e cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Douglas Slobod
- Department of Critical Care Medicine, McGill University, Montreal, Quebec, Canada
| | - Amedeo Guzzardella
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Ilaria Protti
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Eleonora Carlesso
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Arif Canakoglu
- Department of Anesthesia, Critical Care and Emergency, Fondazione Istituto di Ricovero e cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Jacopo Fumagalli
- Department of Anesthesia, Critical Care and Emergency, Fondazione Istituto di Ricovero e cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Vittorio Scaravilli
- Department of Anesthesia, Critical Care and Emergency, Fondazione Istituto di Ricovero e cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Sebastiano M Colombo
- Department of Anesthesia, Critical Care and Emergency, Fondazione Istituto di Ricovero e cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Alessio Caccioppola
- Department of Anesthesia, Critical Care and Emergency, Fondazione Istituto di Ricovero e cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Matteo Brioni
- Department of Anesthesia, Critical Care and Emergency, Fondazione Istituto di Ricovero e cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Antonio M Pesenti
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
- Department of Anesthesia, Critical Care and Emergency, Fondazione Istituto di Ricovero e cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Giacomo Grasselli
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
- Department of Anesthesia, Critical Care and Emergency, Fondazione Istituto di Ricovero e cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
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40
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Bluth T, Güldner A, Spieth PM. [Ventilation concepts under extracorporeal membrane oxygenation (ECMO) in acute respiratory distress syndrome (ARDS)]. DIE ANAESTHESIOLOGIE 2024; 73:352-362. [PMID: 38625538 DOI: 10.1007/s00101-024-01407-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
Extracorporeal membrane oxygenation (ECMO) is often the last resort for escalation of treatment in patients with severe acute respiratory distress syndrome (ARDS). The success of treatment is mainly determined by patient-specific factors, such as age, comorbidities, duration and invasiveness of the pre-existing ventilation treatment as well as the expertise of the treating ECMO center. In particular, the adjustment of mechanical ventilation during ongoing ECMO treatment remains controversial. Although a reduction of invasiveness of mechanical ventilation seems to be reasonable due to physiological considerations, no improvement in outcome has been demonstrated so far for the use of ultraprotective ventilation regimens.
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Affiliation(s)
- Thomas Bluth
- Klinik für Anästhesiologie und Intensivtherapie, Universitätsklinikum Dresden, Fetscherstraße 74, 01307, Dresden, Deutschland
| | - Andreas Güldner
- Klinik für Anästhesiologie und Intensivtherapie, Universitätsklinikum Dresden, Fetscherstraße 74, 01307, Dresden, Deutschland
| | - Peter M Spieth
- Klinik für Anästhesiologie und Intensivtherapie, Universitätsklinikum Dresden, Fetscherstraße 74, 01307, Dresden, Deutschland.
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Sottile PD, Smith B, Stroh JN, Albers DJ, Moss M. Flow-Limited and Reverse-Triggered Ventilator Dyssynchrony Are Associated With Increased Tidal and Dynamic Transpulmonary Pressure. Crit Care Med 2024; 52:743-751. [PMID: 38214566 PMCID: PMC11018465 DOI: 10.1097/ccm.0000000000006180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
OBJECTIVES Ventilator dyssynchrony may be associated with increased delivered tidal volumes (V t s) and dynamic transpulmonary pressure (ΔP L,dyn ), surrogate markers of lung stress and strain, despite low V t ventilation. However, it is unknown which types of ventilator dyssynchrony are most likely to increase these metrics or if specific ventilation or sedation strategies can mitigate this potential. DESIGN A prospective cohort analysis to delineate the association between ten types of breaths and delivered V t , ΔP L,dyn , and transpulmonary mechanical energy. SETTING Patients admitted to the medical ICU. PATIENTS Over 580,000 breaths from 35 patients with acute respiratory distress syndrome (ARDS) or ARDS risk factors. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS Patients received continuous esophageal manometry. Ventilator dyssynchrony was identified using a machine learning algorithm. Mixed-effect models predicted V t , ΔP L,dyn , and transpulmonary mechanical energy for each type of ventilator dyssynchrony while controlling for repeated measures. Finally, we described how V t , positive end-expiratory pressure (PEEP), and sedation (Richmond Agitation-Sedation Scale) strategies modify ventilator dyssynchrony's association with these surrogate markers of lung stress and strain. Double-triggered breaths were associated with the most significant increase in V t , ΔP L,dyn , and transpulmonary mechanical energy. However, flow-limited, early reverse-triggered, and early ventilator-terminated breaths were also associated with significant increases in V t , ΔP L,dyn , and energy. The potential of a ventilator dyssynchrony type to increase V t , ΔP L,dyn , or energy clustered similarly. Increasing set V t may be associated with a disproportionate increase in high-volume and high-energy ventilation from double-triggered breaths, but PEEP and sedation do not clinically modify the interaction between ventilator dyssynchrony and surrogate markers of lung stress and strain. CONCLUSIONS Double-triggered, flow-limited, early reverse-triggered, and early ventilator-terminated breaths are associated with increases in V t , ΔP L,dyn , and energy. As flow-limited breaths are more than twice as common as double-triggered breaths, further work is needed to determine the interaction of ventilator dyssynchrony frequency to cause clinically meaningful changes in patient outcomes.
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Affiliation(s)
- Peter D Sottile
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado | Anschutz Medical Campus, Aurora, CO, 80045
| | - Bradford Smith
- Department of Bioengineering, University of Colorado | Anschutz Medical Campus, Aurora, CO, 80045
- Division of Pediatric Pulmonary and Sleep Medicine, University of Colorado | Anschutz Medical Campus, Aurora, CO, 80045
| | - Jake N Stroh
- Department of Bioengineering, University of Colorado | Anschutz Medical Campus, Aurora, CO, 80045
| | - David J Albers
- Department of Bioengineering, University of Colorado | Anschutz Medical Campus, Aurora, CO, 80045
- Department of Biomedical Informatics, University of Colorado | Anschutz Medical Campus, Aurora, CO, 80045
| | - Marc Moss
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado | Anschutz Medical Campus, Aurora, CO, 80045
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42
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Becker AP, Mang S, Rixecker T, Lepper PM. [COVID-19 in the intensive care unit]. Pneumologie 2024; 78:330-345. [PMID: 38759701 DOI: 10.1055/a-1854-2693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/19/2024]
Abstract
The acute respiratory failure as well as ARDS (acute respiratory distress syndrome) have challenged clinicians since the initial description over 50 years ago. Various causes can lead to ARDS and therapeutic approaches for ARDS/ARF are limited to the support or replacement of organ functions and the prevention of therapy-induced consequences. In recent years, triggered by the SARS-CoV-2 pathogen, numerous cases of acute lung failure (C-ARDS) have emerged. The pathophysiological processes of classical ARDS and C-ARDS are essentially similar. In their final stages of inflammation, both lead to a disruption of the blood-air barrier. Treatment strategies for C-ARDS, like classical ARDS, focus on supporting or replacing organ functions and preventing consequential damage. This article summarizes the treatment strategies in the intensive care unit.
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Agrawal DK, Smith BJ, Sottile PD, Hripcsak G, Albers DJ. Quantifiable identification of flow-limited ventilator dyssynchrony with the deformed lung ventilator model. Comput Biol Med 2024; 173:108349. [PMID: 38547660 DOI: 10.1016/j.compbiomed.2024.108349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 03/13/2024] [Accepted: 03/17/2024] [Indexed: 04/17/2024]
Abstract
BACKGROUND Ventilator dyssynchrony (VD) can worsen lung injury and is challenging to detect and quantify due to the complex variability in the dyssynchronous breaths. While machine learning (ML) approaches are useful for automating VD detection from the ventilator waveform data, scalable severity quantification and its association with pathogenesis and ventilator mechanics remain challenging. OBJECTIVE We develop a systematic framework to quantify pathophysiological features observed in ventilator waveform signals such that they can be used to create feature-based severity stratification of VD breaths. METHODS A mathematical model was developed to represent the pressure and volume waveforms of individual breaths in a feature-based parametric form. Model estimates of respiratory effort strength were used to assess the severity of flow-limited (FL)-VD breaths compared to normal breaths. A total of 93,007 breath waveforms from 13 patients were analyzed. RESULTS A novel model-defined continuous severity marker was developed and used to estimate breath phenotypes of FL-VD breaths. The phenotypes had a predictive accuracy of over 97% with respect to the previously developed ML-VD identification algorithm. To understand the incidence of FL-VD breaths and their association with the patient state, these phenotypes were further successfully correlated with ventilator-measured parameters and electronic health records. CONCLUSION This work provides a computational pipeline to identify and quantify the severity of FL-VD breaths and paves the way for a large-scale study of VD causes and effects. This approach has direct application to clinical practice and in meaningful knowledge extraction from the ventilator waveform data.
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Affiliation(s)
- Deepak K Agrawal
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, Maharashtra, 400076, India; Department of Bioengineering, University of Colorado Denver | Anschutz Medical Campus, Aurora, CO, 80045, USA.
| | - Bradford J Smith
- Department of Bioengineering, University of Colorado Denver | Anschutz Medical Campus, Aurora, CO, 80045, USA; Section of Pulmonary and Sleep Medicine, Department of Pediatrics, University of Colorado Denver, Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Peter D Sottile
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado School of Medicine, Aurora, CO, 80045, USA
| | - George Hripcsak
- Department of Biomedical Informatics, Columbia University, New York, NY, 10027, USA
| | - David J Albers
- Department of Bioengineering, University of Colorado Denver | Anschutz Medical Campus, Aurora, CO, 80045, USA; Department of Biomedical Informatics, Columbia University, New York, NY, 10027, USA; Department of Biomedical Informatics, Univerisity of Colorado Anschutz Medical Campus, Aurora, CO 80045.
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44
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Ferrer M, De Pascale G, Tanzarella ES, Antonelli M. Severe Community-Acquired Pneumonia: Noninvasive Mechanical Ventilation, Intubation, and HFNT. Semin Respir Crit Care Med 2024; 45:169-186. [PMID: 38604188 DOI: 10.1055/s-0043-1778140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
Severe acute respiratory failure (ARF) is a major issue in patients with severe community-acquired pneumonia (CAP). Standard oxygen therapy is the first-line therapy for ARF in the less severe cases. However, respiratory supports may be delivered in more severe clinical condition. In cases with life-threatening ARF, invasive mechanical ventilation (IMV) will be required. Noninvasive strategies such as high-flow nasal therapy (HFNT) or noninvasive ventilation (NIV) by either face mask or helmet might cover the gap between standard oxygen and IMV. The objective of all the supporting measures for ARF is to gain time for the antimicrobial treatment to cure the pneumonia. There is uncertainty regarding which patients with severe CAP are most likely to benefit from each noninvasive support strategy. HFNT may be the first-line approach in the majority of patients. While NIV may be relatively contraindicated in patients with excessive secretions, facial hair/structure resulting in air leaks or poor compliance, NIV may be preferable in those with increased work of breathing, respiratory muscle fatigue, and congestive heart failure, in which the positive pressure of NIV may positively impact hemodynamics. A trial of NIV might be considered for select patients with hypoxemic ARF if there are no contraindications, with close monitoring by an experienced clinical team who can intubate patients promptly if they deteriorate. In such cases, individual clinician judgement is key to choose NIV, interface, and settings. Due to the paucity of studies addressing IMV in this population, the protective mechanical ventilation strategies recommended by guidelines for acute respiratory distress syndrome can be reasonably applied in patients with severe CAP.
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Affiliation(s)
- Miquel Ferrer
- Unitat de Vigilancia Intensiva Respiratoria, Servei de Pneumologia, Hospital Clinic de Barcelona, Institut d'Investigacions Biomediques August Pi I Sunyer (IDIBAPS), Barcelona, Spain
- Departament de Medicina, Universitat de Barcelona, Barcelona, Spain
- Centro de Investigacion Biomedica En Red-Enfermedades Respiratorias (CIBERES-CB060628), Barcelona, Spain
| | - Gennaro De Pascale
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, Rome, Italy
- Dipartimento di Scienze dell'Emergenza, Anestesiologiche e della Rianimazione, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Eloisa S Tanzarella
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, Rome, Italy
- Dipartimento di Scienze dell'Emergenza, Anestesiologiche e della Rianimazione, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Massimo Antonelli
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, Rome, Italy
- Dipartimento di Scienze dell'Emergenza, Anestesiologiche e della Rianimazione, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
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45
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Trieu M, Qadir N. Adjunctive Therapies in Acute Respiratory Distress Syndrome. Crit Care Clin 2024; 40:329-351. [PMID: 38432699 DOI: 10.1016/j.ccc.2023.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
Despite significant advances in understanding acute respiratory distress syndrome (ARDS), mortality rates remain high. The appropriate use of adjunctive therapies can improve outcomes, particularly for patients with moderate to severe hypoxia. In this review, the authors discuss the evidence basis behind prone positioning, recruitment maneuvers, neuromuscular blocking agents, corticosteroids, pulmonary vasodilators, and extracorporeal membrane oxygenation and considerations for their use in individual patients and specific clinical scenarios. Because the heterogeneity of ARDS poses challenges in finding universally effective treatments, an individualized approach and continued research efforts are crucial for optimizing the utilization of adjunctive therapies and improving patient outcomes.
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Affiliation(s)
- Megan Trieu
- Division of Pulmonary Critical Care Sleep Medicine and Physiology, Department of Medicine, University of California San Diego, 9300 Campus Point Drive, #7381, La Jolla, CA 92037-1300, USA
| | - Nida Qadir
- Division of Pulmonary Critical Care and Sleep Medicine, Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, 10833 Le Conte Avenue, Room 43-229 CHS, Los Angeles, CA 90095, USA.
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Angelini M, Belletti A, Landoni G, Zangrillo A, De Cobelli F, Palumbo D. Macklin Effect: From Pathophysiology to Clinical Implication. J Cardiothorac Vasc Anesth 2024; 38:881-883. [PMID: 38378321 DOI: 10.1053/j.jvca.2023.12.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 11/30/2023] [Accepted: 12/16/2023] [Indexed: 02/22/2024]
Abstract
Air leak syndromes (such as pneumomediastinum, pneumothorax, or subcutaneous emphysema) are frequent complications of acute respiratory distress syndrome (ARDS). Unfortunately, the development of air leaks is associated with worse outcomes. In addition, it has been hypothesized that the development of pneumomediastinum could be a marker of disease severity in patients with respiratory failure receiving noninvasive respiratory support or assisted ventilation. The so-called Macklin effect (or pulmonary interstitial emphysema) is the air dissection of the lung bronchovascular tree from peripheral to central airways following injury to distal alveoli. Ultimately, the progression of the Macklin effect leads to the development of pneumomediastinum, subcutaneous emphysema, or pneumothorax. The Macklin effect is identifiable on a chest computed tomography (CT) scan. The Macklin effect could be an accurate predictor of barotrauma in patients with ARDS (sensitivity = 89.2% [95% CI: 74.6-96.9]; specificity = 95.6% [95% CI: 90.6-98.4]), and may be a marker of disease severity. Accordingly, the detection of the Macklin effect on a chest CT scan could be used to select which patients with ARDS might benefit from different treatment algorithms, including advanced respiratory monitoring, early intubation, or, potentially, the institution of early extracorporeal support with or without invasive ventilation. In this video, the authors summarize the pathophysiology and potential clinical significance and applications of the Macklin effect in patients with acute respiratory failure.
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Affiliation(s)
- Matteo Angelini
- Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute, Milan, Italy; School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
| | - Alessandro Belletti
- Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Giovanni Landoni
- Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute, Milan, Italy; School of Medicine, Vita-Salute San Raffaele University, Milan, Italy.
| | - Alberto Zangrillo
- Department of Anesthesia and Intensive Care, IRCCS San Raffaele Scientific Institute, Milan, Italy; School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
| | - Francesco De Cobelli
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy; Department of Radiology, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Diego Palumbo
- Department of Radiology, IRCCS San Raffaele Scientific Institute, Milan, Italy
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Händel C, Frerichs I, Weiler N, Bergh B. Prediction and simulation of PEEP setting effects with machine learning models. Med Intensiva 2024; 48:191-199. [PMID: 38135579 DOI: 10.1016/j.medine.2023.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 09/20/2023] [Indexed: 12/24/2023]
Abstract
OBJECTIVE To establish a new machine learning-based method to adjust positive end-expiratory pressure (PEEP) using only already routinely measured data. DESIGN Retrospective observational study. SETTING Intensive care unit (ICU). PATIENTS OR PARTICIPANTS 51811 mechanically ventilated patients in multiple ICUs in the USA (data from MIMIC-III and eICU databases). INTERVENTIONS No interventions. MAIN VARIABLES OF INTEREST Success parameters of ventilation (arterial partial pressures of oxygen and carbon dioxide and respiratory system compliance) RESULTS: The multi-tasking neural network model performed significantly best for all target tasks in the primary test set. The model predicts arterial partial pressures of oxygen and carbon dioxide and respiratory system compliance about 45 min into the future with mean absolute percentage errors of about 21.7%, 10.0% and 15.8%, respectively. The proposed use of the model was demonstrated in case scenarios, where we simulated possible effects of PEEP adjustments for individual cases. CONCLUSIONS Our study implies that machine learning approach to PEEP titration is a promising new method which comes with no extra cost once the infrastructure is in place. Availability of databases with most recent ICU patient data is crucial for the refinement of prediction performance.
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Affiliation(s)
- Claas Händel
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Centre Schleswig-Holstein, Campus Kiel, Kiel, Germany; Department of Medical Informatics, University Medical Centre Schleswig-Holstein, Campus Kiel, Kiel, Germany.
| | - Inéz Frerichs
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Centre Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Norbert Weiler
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Centre Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Björn Bergh
- Department of Medical Informatics, University Medical Centre Schleswig-Holstein, Campus Kiel, Kiel, Germany
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Szafran JC, Patel BK. Invasive Mechanical Ventilation. Crit Care Clin 2024; 40:255-273. [PMID: 38432695 DOI: 10.1016/j.ccc.2024.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
Invasive mechanical ventilation allows clinicians to support gas exchange and work of breathing in patients with respiratory failure. However, there is also potential for iatrogenesis. By understanding the benefits and limitations of different modes of ventilation and goals for gas exchange, clinicians can choose a strategy that provides appropriate support while minimizing harm. The ventilator can also provide crucial diagnostic information in the form of respiratory mechanics. These, and the mechanical ventilation strategy, should be regularly reassessed.
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Affiliation(s)
- Jennifer C Szafran
- Department of Medicine, Section of Pulmonary and Critical Care, University of Chicago, 5841 South Maryland Avenue, Chicago, IL 60637, USA.
| | - Bhakti K Patel
- Department of Medicine, Section of Pulmonary and Critical Care, University of Chicago, 5841 South Maryland Avenue, Chicago, IL 60637, USA
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Lapinsky SE, Vasquez DN. Acute Respiratory Failure in Pregnancy. Crit Care Clin 2024; 40:353-366. [PMID: 38432700 DOI: 10.1016/j.ccc.2024.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
Respiratory failure may affect up to 1 in 500 pregnancies, due to pregnancy-specific conditions, conditions aggravated by the pregnant state, or other causes. Management during pregnancy is influenced by altered maternal physiology, and the presence of a fetus influencing imaging, and drug therapy choices. Few studies have addressed the approach to invasive mechanical ventilatory management in pregnancy. Hypoxemia is likely harmful to the fetus, but precise targets are unknown. Hypocapnia reduces uteroplacental circulation, and some degree of hypercapnia may be tolerated in pregnancy. Delivery of the fetus may be considered to improve maternal respiratory status but improvement does not always occur.
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Affiliation(s)
- Stephen E Lapinsky
- Mount Sinai Hospital, Toronto, Interdepartmental Division of Critical Care Medicine, University of Toronto, 600 University Avenue, Toronto M5G1X5, Canada.
| | - Daniela N Vasquez
- ICU Head of Department, Sanatorio Anchorena, Tomás M. de Anchorena 1872, City of Buenos Aires, Argentina
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Gattarello S, Lombardo F, Romitti F, D'Albo R, Velati M, Fratti I, Pozzi T, Nicolardi R, Fioccola A, Busana M, Collino F, Herrmann P, Camporota L, Quintel M, Moerer O, Saager L, Meissner K, Gattinoni L. Determinants of acute kidney injury during high-power mechanical ventilation: secondary analysis from experimental data. Intensive Care Med Exp 2024; 12:31. [PMID: 38512544 PMCID: PMC10957825 DOI: 10.1186/s40635-024-00610-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 02/29/2024] [Indexed: 03/23/2024] Open
Abstract
BACKGROUND The individual components of mechanical ventilation may have distinct effects on kidney perfusion and on the risk of developing acute kidney injury; we aimed to explore ventilatory predictors of acute kidney failure and the hemodynamic changes consequent to experimental high-power mechanical ventilation. METHODS Secondary analysis of two animal studies focused on the outcomes of different mechanical power settings, including 78 pigs mechanically ventilated with high mechanical power for 48 h. The animals were categorized in four groups in accordance with the RIFLE criteria for acute kidney injury (AKI), using the end-experimental creatinine: (1) NO AKI: no increase in creatinine; (2) RIFLE 1-Risk: increase of creatinine of > 50%; (3) RIFLE 2-Injury: two-fold increase of creatinine; (4) RIFLE 3-Failure: three-fold increase of creatinine; RESULTS: The main ventilatory parameter associated with AKI was the positive end-expiratory pressure (PEEP) component of mechanical power. At 30 min from the initiation of high mechanical power ventilation, the heart rate and the pulmonary artery pressure progressively increased from group NO AKI to group RIFLE 3. At 48 h, the hemodynamic variables associated with AKI were the heart rate, cardiac output, mean perfusion pressure (the difference between mean arterial and central venous pressures) and central venous pressure. Linear regression and receiving operator characteristic analyses showed that PEEP-induced changes in mean perfusion pressure (mainly due to an increase in CVP) had the strongest association with AKI. CONCLUSIONS In an experimental setting of ventilation with high mechanical power, higher PEEP had the strongest association with AKI. The most likely physiological determinant of AKI was an increase of pleural pressure and CVP with reduced mean perfusion pressure. These changes resulted from PEEP per se and from increase in fluid administration to compensate for hemodynamic impairment consequent to high PEEP.
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Affiliation(s)
- Simone Gattarello
- Department of Anesthesiology, University Medical Centre Göttingen, Göttingen, Germany.
| | - Fabio Lombardo
- Department of Anesthesiology, University Medical Centre Göttingen, Göttingen, Germany
| | - Federica Romitti
- Department of Anesthesiology, University Medical Centre Göttingen, Göttingen, Germany
| | - Rosanna D'Albo
- Department of Anesthesiology, University Medical Centre Göttingen, Göttingen, Germany
| | - Mara Velati
- Department of Anesthesia and Intensive Care Medicine Department, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Isabella Fratti
- Department of Anesthesiology, University Medical Centre Göttingen, Göttingen, Germany
| | - Tommaso Pozzi
- Department of Anesthesiology, University Medical Centre Göttingen, Göttingen, Germany
| | - Rosmery Nicolardi
- Department of Anesthesia and Intensive Care Medicine Department, IRCCS San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milan, Italy
| | - Antonio Fioccola
- Department of Anesthesiology, University Medical Centre Göttingen, Göttingen, Germany
| | - Mattia Busana
- Department of Anesthesiology, University Medical Centre Göttingen, Göttingen, Germany
| | - Francesca Collino
- Department of Anesthesia, Intensive Care and Emergency, "Città Della Salute E Della Scienza" Hospital, Turin, Italy
| | - Peter Herrmann
- Department of Anesthesiology, University Medical Centre Göttingen, Göttingen, Germany
| | - Luigi Camporota
- Department of Adult Critical Care, Guy's and St. Thomas' NHS Foundation Trust, London, UK
| | - Michael Quintel
- Department of Anesthesiology, University Medical Centre Göttingen, Göttingen, Germany
- Department of Anesthesiology, Intensive Care and Emergency Medicine Donau-Isar-Klinikum Deggendorf, Deggendorf, Germany
| | - Onnen Moerer
- Department of Anesthesiology, University Medical Centre Göttingen, Göttingen, Germany
| | - Leif Saager
- Department of Anesthesiology, University Medical Centre Göttingen, Göttingen, Germany
| | - Konrad Meissner
- Department of Anesthesiology, University Medical Centre Göttingen, Göttingen, Germany
| | - Luciano Gattinoni
- Department of Anesthesiology, University Medical Centre Göttingen, Göttingen, Germany
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