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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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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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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:S0007-0912(24)00263-0. [PMID: 38816331 DOI: 10.1016/j.bja.2024.03.043] [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: 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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4
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Protti A, Tonelli R, Dalla Corte F, Grieco DL, Spinelli E, Spadaro S, Piovani D, Menga LS, Schifino G, Vega Pittao ML, Umbrello M, Cammarota G, Volta CA, Bonovas S, Cecconi M, Mauri T, Clini E. Development of clinical tools to estimate the breathing effort during high-flow oxygen therapy: A multicenter cohort study. Pulmonology 2024:S2531-0437(24)00054-0. [PMID: 38760225 DOI: 10.1016/j.pulmoe.2024.04.008] [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: 03/05/2024] [Revised: 04/11/2024] [Accepted: 04/22/2024] [Indexed: 05/19/2024] Open
Abstract
INTRODUCTION AND OBJECTIVES Quantifying breathing effort in non-intubated patients is important but difficult. We aimed to develop two models to estimate it in patients treated with high-flow oxygen therapy. PATIENTS AND METHODS We analyzed the data of 260 patients from previous studies who received high-flow oxygen therapy. Their breathing effort was measured as the maximal deflection of esophageal pressure (ΔPes). We developed a multivariable linear regression model to estimate ΔPes (in cmH2O) and a multivariable logistic regression model to predict the risk of ΔPes being >10 cmH2O. Candidate predictors included age, sex, diagnosis of the coronavirus disease 2019 (COVID-19), respiratory rate, heart rate, mean arterial pressure, the results of arterial blood gas analysis, including base excess concentration (BEa) and the ratio of arterial tension to the inspiratory fraction of oxygen (PaO2:FiO2), and the product term between COVID-19 and PaO2:FiO2. RESULTS We found that ΔPes can be estimated from the presence or absence of COVID-19, BEa, respiratory rate, PaO2:FiO2, and the product term between COVID-19 and PaO2:FiO2. The adjusted R2 was 0.39. The risk of ΔPes being >10 cmH2O can be predicted from BEa, respiratory rate, and PaO2:FiO2. The area under the receiver operating characteristic curve was 0.79 (0.73-0.85). We called these two models BREF, where BREF stands for BReathing EFfort and the three common predictors: BEa (B), respiratory rate (RE), and PaO2:FiO2 (F). CONCLUSIONS We developed two models to estimate the breathing effort of patients on high-flow oxygen therapy. Our initial findings are promising and suggest that these models merit further evaluation.
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Affiliation(s)
- A Protti
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy; Department of Anesthesia and Intensive Care Units, IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy.
| | - R Tonelli
- Respiratory Diseases Unit, Department of Medical and Surgical Sciences, University Hospital of Modena, University of Modena-Reggio Emilia, Modena, Italy; Laboratory of Cell Therapies and Respiratory Medicine, Department of Medical and Surgical Sciences, University Hospital of Modena, University of Modena-Reggio Emilia, Modena, Italy
| | - F Dalla Corte
- Department of Anesthesia and Intensive Care Units, IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy
| | - D L 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
| | - E Spinelli
- Department of Anesthesia, Intensive Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - S Spadaro
- Department of Translational Medicine, University of Ferrara, Ferrara, Italy
| | - D Piovani
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy; IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy
| | - L 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
| | - G Schifino
- Respiratory and Critical Care Unit, IRCCS Azienda Ospedaliero Universitaria di Bologna, Bologna, Italy; Alma Mater Studiorum, Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Bologna, Italy
| | - M L Vega Pittao
- Respiratory and Critical Care Unit, IRCCS Azienda Ospedaliero Universitaria di Bologna, Bologna, Italy; Alma Mater Studiorum, Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Bologna, Italy
| | - M Umbrello
- SC Rianimazioine e Anestesia, ASST Ovest Milanese, Ospedale Civile di Legnano, Legnano, Milan, Italy
| | - G Cammarota
- Department of Traslational Medicine, Università degli Studi del Piemonte Orientale, Novara, Italy
| | - C A Volta
- Department of Translational Medicine, University of Ferrara, Ferrara, Italy
| | - S Bonovas
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy; IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy
| | - M Cecconi
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy; Department of Anesthesia and Intensive Care Units, IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy
| | - T Mauri
- Department of Anesthesia, Intensive Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - E Clini
- Respiratory Diseases Unit, Department of Medical and Surgical Sciences, University Hospital of Modena, University of Modena-Reggio Emilia, Modena, Italy; Laboratory of Cell Therapies and Respiratory Medicine, Department of Medical and Surgical Sciences, University Hospital of Modena, University of Modena-Reggio Emilia, Modena, Italy
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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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Lorente L, Sabater-Riera J, Rello J. Surveillance and prevention of healthcare-associated infections: best practices to prevent ventilator-associated events. Expert Rev Anti Infect Ther 2024; 22:317-332. [PMID: 38642072 DOI: 10.1080/14787210.2024.2345877] [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: 02/12/2024] [Accepted: 04/17/2024] [Indexed: 04/22/2024]
Abstract
INTRODUCTION Ventilator associated pneumonia (VAP) leads to an increase in morbidity, mortality, and healthcare costs. In addition to increased evidence from the latest European and American guidelines (published in 2017 and 2022, respectively), in the last two years, several important clinical experiences have added new prevention tools to be included to improve the management of VAP. AREAS COVERED This paper is a narrative review of new evidence on VAP prevention. We divided VAP prevention measures into pharmacological, non-pharmacological, and ventilator care bundles. EXPERT OPINION Most of the effective strategies that have been shown to decrease the incidence of complications are easy to implement and inexpensive. The implementation of care bundles, accompanied by educational measures and a multidisciplinary team should be part of optimal management. In addition to ventilator care bundles for the prevention of VAP, it could possibly be beneficial to use ventilator care bundles for the prevention of noninfectious ventilator associated events.
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Affiliation(s)
- Leonardo Lorente
- Intensive Care Unit, Hospital Universitario de Canarias, La Laguna, Spain
| | - Joan Sabater-Riera
- IDIBELL, Hospitalet de Llobregat, Spain, Hospital Universitario de Bellvitge, Hospitalet de Llobregat, Spain
| | - Jordi Rello
- CRIPS (Clinical Research in Pneumonia & Sepsis); Vall d'Hebron Institute of Research, Barcelona, Spain
- Formation, Recherche, Evaluation (FOREVA), CHU Nîmes, Nîmes, France
- CIBERES, Instituto de Salud Carlos III, Madrid, Spain
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Coiffard B, Dianti J, Telias I, Brochard LJ, Slutsky AS, Beck J, Sinderby C, Ferguson ND, Goligher EC. Dyssynchronous diaphragm contractions impair diaphragm function in mechanically ventilated patients. Crit Care 2024; 28:107. [PMID: 38566126 PMCID: PMC10988824 DOI: 10.1186/s13054-024-04894-3] [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: 01/31/2024] [Accepted: 03/27/2024] [Indexed: 04/04/2024] Open
Abstract
BACKGROUND Pre-clinical studies suggest that dyssynchronous diaphragm contractions during mechanical ventilation may cause acute diaphragm dysfunction. We aimed to describe the variability in diaphragm contractile loading conditions during mechanical ventilation and to establish whether dyssynchronous diaphragm contractions are associated with the development of impaired diaphragm dysfunction. METHODS In patients receiving invasive mechanical ventilation for pneumonia, septic shock, acute respiratory distress syndrome, or acute brain injury, airway flow and pressure and diaphragm electrical activity (Edi) were recorded hourly around the clock for up to 7 days. Dyssynchronous post-inspiratory diaphragm loading was defined based on the duration of neural inspiration after expiratory cycling of the ventilator. Diaphragm function was assessed on a daily basis by neuromuscular coupling (NMC, the ratio of transdiaphragmatic pressure to diaphragm electrical activity). RESULTS A total of 4508 hourly recordings were collected in 45 patients. Edi was low or absent (≤ 5 µV) in 51% of study hours (median 71 h per patient, interquartile range 39-101 h). Dyssynchronous post-inspiratory loading was present in 13% of study hours (median 7 h per patient, interquartile range 2-22 h). The probability of dyssynchronous post-inspiratory loading was increased with reverse triggering (odds ratio 15, 95% CI 8-35) and premature cycling (odds ratio 8, 95% CI 6-10). The duration and magnitude of dyssynchronous post-inspiratory loading were associated with a progressive decline in diaphragm NMC (p < 0.01 for interaction with time). CONCLUSIONS Dyssynchronous diaphragm contractions may impair diaphragm function during mechanical ventilation. TRIAL REGISTRATION MYOTRAUMA, ClinicalTrials.gov NCT03108118. Registered 04 April 2017 (retrospectively registered).
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Affiliation(s)
- Benjamin Coiffard
- Department of Respiratory Medicine, Aix-Marseille University, APHM, Hôpital Nord, Marseille, France
| | - Jose Dianti
- Division of Respirology, Department of Medicine, University Health Network, Toronto, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
| | - Irene Telias
- Division of Respirology, Department of Medicine, University Health Network, Toronto, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada
| | - Laurent J Brochard
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada
| | - Arthur S Slutsky
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada
| | - Jennifer Beck
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada
- University of Toronto, Toronto, Canada
| | - Christer Sinderby
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada
- University of Toronto, Toronto, Canada
| | - Niall D Ferguson
- Division of Respirology, Department of Medicine, University Health Network, Toronto, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Toronto General Hospital Research Institute, 585 University Ave., 9-MaRS-9024, Toronto, ON, M5G 2N2, Canada
- Department of Physiology, University of Toronto, Toronto, Canada
- Institute for Health Policy, Management, and Evaluation, University of Toronto, Toronto, Canada
| | - Ewan C Goligher
- Division of Respirology, Department of Medicine, University Health Network, Toronto, Canada.
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada.
- Toronto General Hospital Research Institute, 585 University Ave., 9-MaRS-9024, Toronto, ON, M5G 2N2, Canada.
- Department of Physiology, University of Toronto, Toronto, Canada.
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8
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von Wedel D, Redaelli S, Suleiman A, Wachtendorf LJ, Fosset M, Santer P, Shay D, Munoz-Acuna R, Chen G, Talmor D, Jung B, Baedorf-Kassis EN, Schaefer MS. Adjustments of Ventilator Parameters during Operating Room-to-ICU Transition and 28-Day Mortality. Am J Respir Crit Care Med 2024; 209:553-562. [PMID: 38190707 DOI: 10.1164/rccm.202307-1168oc] [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: 07/09/2023] [Accepted: 01/08/2024] [Indexed: 01/10/2024] Open
Abstract
Rationale: Lung-protective mechanical ventilation strategies have been proven beneficial in the operating room (OR) and the ICU. However, differential practices in ventilator management persist, often resulting in adjustments of ventilator parameters when transitioning patients from the OR to the ICU. Objectives: To characterize patterns of ventilator adjustments during the transition of mechanically ventilated surgical patients from the OR to the ICU and assess their impact on 28-day mortality. Methods: Hospital registry study including patients undergoing general anesthesia with continued, controlled mechanical ventilation in the ICU between 2008 and 2022. Ventilator parameters were assessed 1 hour before and 6 hours after the transition. Measurements and Main Results: Of 2,103 patients, 212 (10.1%) died within 28 days. Upon OR-to-ICU transition, VT and driving pressure decreased (-1.1 ml/kg predicted body weight [IQR, -2.0 to -0.2]; P < 0.001; and -4.3 cm H2O [-8.2 to -1.2]; P < 0.001). Concomitantly, respiratory rates increased (+5.0 breaths/min [2.0 to 7.5]; P < 0.001), resulting overall in slightly higher mechanical power (MP) in the ICU (+0.7 J/min [-1.9 to 3.0]; P < 0.001). In adjusted analysis, increases in MP were associated with a higher 28-day mortality rate (adjusted odds ratio, 1.10; 95% confidence interval, 1.06-1.14; P < 0.001; adjusted risk difference, 0.7%; 95% confidence interval, 0.4-1.0, both per 1 J/min). Conclusion: During transition of mechanically ventilated patients from the OR to the ICU, ventilator adjustments resulting in higher MP were associated with a greater risk of 28-day mortality.
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Affiliation(s)
- Dario von Wedel
- Department of Anesthesia, Critical Care and Pain Medicine
- Center for Anesthesia Research Excellence, and
| | - Simone Redaelli
- Department of Anesthesia, Critical Care and Pain Medicine
- Center for Anesthesia Research Excellence, and
- School of Medicine and Surgery, University of Milano-Bicocca, Milan, Italy
| | - Aiman Suleiman
- Department of Anesthesia, Critical Care and Pain Medicine
- Center for Anesthesia Research Excellence, and
- Department of Anesthesia and Intensive Care, Faculty of Medicine, University of Jordan, Amman, Jordan
| | - Luca J Wachtendorf
- Department of Anesthesia, Critical Care and Pain Medicine
- Center for Anesthesia Research Excellence, and
| | - Maxime Fosset
- Department of Anesthesia, Critical Care and Pain Medicine
- Center for Anesthesia Research Excellence, and
- Medical Intensive Care Unit and PhyMedExp, Institut National de la Santé et de la Recherche Médicale, Montpellier University Hospital, Montpellier, France
| | - Peter Santer
- Department of Anesthesia, Critical Care and Pain Medicine
- Center for Anesthesia Research Excellence, and
| | - Denys Shay
- Department of Anesthesia, Critical Care and Pain Medicine
- Center for Anesthesia Research Excellence, and
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts; and
| | - Ricardo Munoz-Acuna
- Department of Anesthesia, Critical Care and Pain Medicine
- Center for Anesthesia Research Excellence, and
| | - Guanqing Chen
- Department of Anesthesia, Critical Care and Pain Medicine
- Center for Anesthesia Research Excellence, and
| | - Daniel Talmor
- Department of Anesthesia, Critical Care and Pain Medicine
| | - Boris Jung
- Department of Anesthesia, Critical Care and Pain Medicine
- Center for Anesthesia Research Excellence, and
- Department of Pulmonary, Critical Care & Sleep Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
- Medical Intensive Care Unit and PhyMedExp, Institut National de la Santé et de la Recherche Médicale, Montpellier University Hospital, Montpellier, France
| | - Elias N Baedorf-Kassis
- Department of Pulmonary, Critical Care & Sleep Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Maximilian S Schaefer
- Department of Anesthesia, Critical Care and Pain Medicine
- Center for Anesthesia Research Excellence, and
- Department of Anesthesiology, Düsseldorf University Hospital, Dusseldorf, Germany
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9
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Widing H, Pellegrini M, Chiodaroli E, Persson P, Hallén K, Perchiazzi G. Positive end-expiratory pressure limits inspiratory effort through modulation of the effort-to-drive ratio: an experimental crossover study. Intensive Care Med Exp 2024; 12:10. [PMID: 38311676 PMCID: PMC10838888 DOI: 10.1186/s40635-024-00597-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 01/11/2024] [Indexed: 02/06/2024] Open
Abstract
BACKGROUND How assisted spontaneous breathing should be used during acute respiratory distress syndrome is questioned. Recent evidence suggests that high positive end-expiratory pressure (PEEP) may limit the risk of patient self-inflicted lung injury (P-SILI). The aim of this study was to assess the effects of PEEP on esophageal pressure swings, inspiratory drive, and the neuromuscular efficiency of ventilation. We hypothesized that high PEEP would reduce esophageal pressure swings, regardless of inspiratory drive changes, by modulating the effort-to-drive ratio (EDR). This was tested retrospectively in an experimental animal crossover study. Anesthetized pigs (n = 15) were subjected to mild to moderate lung injury and different PEEP levels were applied, changing PEEP from 0 to 15 cmH2O and back to 0 cmH2O in steps of 3 cmH2O. Airway pressure, esophageal pressure (Pes), and electric activity of the diaphragm (Edi) were collected. The EDR was calculated as the tidal change in Pes divided by the tidal change in Edi. Statistical differences were tested using the Wilcoxon signed-rank test. RESULTS Inspiratory esophageal pressure swings decreased from - 4.2 ± 3.1 cmH2O to - 1.9 ± 1.5 cmH2O (p < 0.01), and the mean EDR fell from - 1.12 ± 1.05 cmH2O/µV to - 0.24 ± 0.20 (p < 0.01) as PEEP was increased from 0 to 15 cmH2O. The EDR was significantly correlated to the PEEP level (rs = 0.35, p < 0.01). CONCLUSIONS Higher PEEP limits inspiratory effort by modulating the EDR of the respiratory system. These findings indicate that PEEP may be used in titration of the spontaneous impact on ventilation and in P-SILI risk reduction, potentially facilitating safe assisted spontaneous breathing. Similarly, ventilation may be shifted from highly spontaneous to predominantly controlled ventilation using PEEP. These findings need to be confirmed in clinical settings.
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Affiliation(s)
- Hannes Widing
- Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Akademiska sjukhuset, Ing 40, 3 tr, 751 85, Uppsala, Sweden.
- Department of Anesthesiology and Intensive Care Medicine, Region Västra Götaland, Sahlgrenska University Hospital/Östra, Gothenburg, Sweden.
| | - Mariangela Pellegrini
- Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Akademiska sjukhuset, Ing 40, 3 tr, 751 85, Uppsala, Sweden
- Department of Anesthesia, Operation, and Intensive Care, Uppsala University Hospital, Uppsala, Sweden
| | - Elena Chiodaroli
- Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Akademiska sjukhuset, Ing 40, 3 tr, 751 85, Uppsala, Sweden
- Anesthesia and Intensive Care Medicine, Polo Universitario San Paolo, University of Milan, Milan, Italy
| | - Per Persson
- Department of Anesthesiology and Intensive Care Medicine, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Katarina Hallén
- Department of Anesthesiology and Intensive Care Medicine, Region Västra Götaland, Sahlgrenska University Hospital/Östra, Gothenburg, Sweden
| | - Gaetano Perchiazzi
- Hedenstierna Laboratory, Department of Surgical Sciences, Uppsala University, Akademiska sjukhuset, Ing 40, 3 tr, 751 85, Uppsala, Sweden
- Department of Anesthesia, Operation, and Intensive Care, Uppsala University Hospital, Uppsala, Sweden
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10
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Qadir N, Sahetya S, Munshi L, Summers C, Abrams D, Beitler J, Bellani G, Brower RG, Burry L, Chen JT, Hodgson C, Hough CL, Lamontagne F, Law A, Papazian L, Pham T, Rubin E, Siuba M, Telias I, Patolia S, Chaudhuri D, Walkey A, Rochwerg B, Fan E. An Update on Management of Adult Patients with Acute Respiratory Distress Syndrome: An Official American Thoracic Society Clinical Practice Guideline. Am J Respir Crit Care Med 2024; 209:24-36. [PMID: 38032683 PMCID: PMC10870893 DOI: 10.1164/rccm.202311-2011st] [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: 11/02/2023] [Indexed: 12/01/2023] Open
Abstract
Background: This document updates previously published Clinical Practice Guidelines for the management of patients with acute respiratory distress syndrome (ARDS), incorporating new evidence addressing the use of corticosteroids, venovenous extracorporeal membrane oxygenation, neuromuscular blocking agents, and positive end-expiratory pressure (PEEP). Methods: We summarized evidence addressing four "PICO questions" (patient, intervention, comparison, and outcome). A multidisciplinary panel with expertise in ARDS used the Grading of Recommendations, Assessment, Development, and Evaluation framework to develop clinical recommendations. Results: We suggest the use of: 1) corticosteroids for patients with ARDS (conditional recommendation, moderate certainty of evidence), 2) venovenous extracorporeal membrane oxygenation in selected patients with severe ARDS (conditional recommendation, low certainty of evidence), 3) neuromuscular blockers in patients with early severe ARDS (conditional recommendation, low certainty of evidence), and 4) higher PEEP without lung recruitment maneuvers as opposed to lower PEEP in patients with moderate to severe ARDS (conditional recommendation, low to moderate certainty), and 5) we recommend against using prolonged lung recruitment maneuvers in patients with moderate to severe ARDS (strong recommendation, moderate certainty). Conclusions: We provide updated evidence-based recommendations for the management of ARDS. Individual patient and illness characteristics should be factored into clinical decision making and implementation of these recommendations while additional evidence is generated from much-needed clinical trials.
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11
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Roca O, Goligher EC, Amato MBP. Driving pressure: applying the concept at the bedside. Intensive Care Med 2023; 49:991-995. [PMID: 37191695 DOI: 10.1007/s00134-023-07071-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Accepted: 04/09/2023] [Indexed: 05/17/2023]
Affiliation(s)
- Oriol Roca
- Servei de Medicina Intensiva, Parc Taulí Hospital Universitari, Institut de Recerca Part Taulí-I3PT, Parc del Taulí 1, 08028, Sabadell, Spain.
- Departament de Medicina, Universitat Autònoma de Barcelona, Bellaterra, Spain.
| | - Ewan C Goligher
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
- Department of Medicine, University Health Network Toronto, Toronto, ON, Canada
- Toronto General Hospital Research Institute Toronto, Toronto, ON, Canada
| | - Marcelo B P Amato
- Laboratório de Pneumologia LIM-09, Disciplina de Pneumologia, Heart Institute (Incor), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
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12
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Ramirez-Estrada S, Peña-Lopez Y, Vieceli T, Rello J. Ventilator-associated events: From surveillance to optimizing management. JOURNAL OF INTENSIVE MEDICINE 2023; 3:204-211. [PMID: 37533808 PMCID: PMC10391577 DOI: 10.1016/j.jointm.2022.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 08/22/2022] [Accepted: 09/20/2022] [Indexed: 08/04/2023]
Abstract
Mechanical ventilation (MV) is a life-support therapy that may predispose to morbid and lethal complications, with ventilator-associated pneumonia (VAP) being the most prevalent. In 2013, the Center for Disease Control (CDC) defined criteria for ventilator-associated events (VAE). Ten years later, a growing number of studies assessing or validating its clinical applicability and the potential benefits of its inclusion have been published. Surveillance with VAE criteria is retrospective and the focus is often on a subset of patients with higher than lower severity. To date, it is estimated that around 30% of ventilated patients in the intensive care unit (ICU) develop VAE. While surveillance enhances the detection of infectious and non-infectious MV-related complications that are severe enough to impact the patient's outcomes, there are still many gaps in its classification and management. In this review, we provide an update by discussing VAE etiologies, epidemiology, and classification. Preventive strategies on optimizing ventilation, sedative and neuromuscular blockade therapy, and restrictive fluid management are warranted. An ideal VAE bundle is likely to minimize the period of intubation. We believe that it is time to progress from just surveillance to clinical care. Therefore, with this review, we have aimed to provide a roadmap for future research on the subject.
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Affiliation(s)
| | - Yolanda Peña-Lopez
- Paediatric Critical Care Department, Hospital Universitari Vall d'Hebron, Barcelona 08035, Spain
- Clinical Research/Epidemiology in Pneumonia and Sepsis (CRIPS), Vall d'Hebron Research Institute, Barcelona 08035, Spain
| | - Tarsila Vieceli
- Infectious Diseases Department, Hospital de Clínicas de Porto Alegre, Porto Alegre RS 90035-007, Brazil
| | - Jordi Rello
- Clinical Research/Epidemiology in Pneumonia and Sepsis (CRIPS), Vall d'Hebron Research Institute, Barcelona 08035, Spain
- Universitat Internacional de Catalunya, Barcelona 08195, Spain
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13
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Spinelli E, Pesenti A, Slobod D, Fornari C, Fumagalli R, Grasselli G, Volta CA, Foti G, Navalesi P, Knafelj R, Pelosi P, Mancebo J, Brochard L, Mauri T. Clinical risk factors for increased respiratory drive in intubated hypoxemic patients. Crit Care 2023; 27:138. [PMID: 37041553 PMCID: PMC10088111 DOI: 10.1186/s13054-023-04402-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 03/14/2023] [Indexed: 04/13/2023] Open
Abstract
BACKGROUND There is very limited evidence identifying factors that increase respiratory drive in hypoxemic intubated patients. Most physiological determinants of respiratory drive cannot be directly assessed at the bedside (e.g., neural inputs from chemo- or mechano-receptors), but clinical risk factors commonly measured in intubated patients could be correlated with increased drive. We aimed to identify clinical risk factors independently associated with increased respiratory drive in intubated hypoxemic patients. METHODS We analyzed the physiological dataset from a multicenter trial on intubated hypoxemic patients on pressure support (PS). Patients with simultaneous assessment of the inspiratory drop in airway pressure at 0.1-s during an occlusion (P0.1) and risk factors for increased respiratory drive on day 1 were included. We evaluated the independent correlation of the following clinical risk factors for increased drive with P0.1: severity of lung injury (unilateral vs. bilateral pulmonary infiltrates, PaO2/FiO2, ventilatory ratio); arterial blood gases (PaO2, PaCO2 and pHa); sedation (RASS score and drug type); SOFA score; arterial lactate; ventilation settings (PEEP, level of PS, addition of sigh breaths). RESULTS Two-hundred seventeen patients were included. Clinical risk factors independently correlated with higher P0.1 were bilateral infiltrates (increase ratio [IR] 1.233, 95%CI 1.047-1.451, p = 0.012); lower PaO2/FiO2 (IR 0.998, 95%CI 0.997-0.999, p = 0.004); higher ventilatory ratio (IR 1.538, 95%CI 1.267-1.867, p < 0.001); lower pHa (IR 0.104, 95%CI 0.024-0.464, p = 0.003). Higher PEEP was correlated with lower P0.1 (IR 0.951, 95%CI 0.921-0.982, p = 0.002), while sedation depth and drugs were not associated with P0.1. CONCLUSIONS Independent clinical risk factors for higher respiratory drive in intubated hypoxemic patients include the extent of lung edema and of ventilation-perfusion mismatch, lower pHa, and lower PEEP, while sedation strategy does not affect drive. These data underline the multifactorial nature of increased respiratory drive.
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Affiliation(s)
- Elena Spinelli
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Antonio Pesenti
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Douglas Slobod
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
- Department of Critical Care Medicine, McGill University, Montreal, QC, Canada
| | - Carla Fornari
- Research Centre On Public Health, University of Milano - Bicocca, Monza, Italy
| | - Roberto Fumagalli
- Anesthesia and Critical Care Service 1, Niguarda Hospital, Milan, Italy
| | - Giacomo Grasselli
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Carlo Alberto Volta
- Morphology, Surgery and Experimental Medicine, Anesthesia and Intensive Care Unit, University of Ferrara, Ferrara, Italy
| | - Giuseppe Foti
- Anesthesia and Critical Care, San Gerardo Hospital, ASST Monza, Monza, Italy
| | - Paolo Navalesi
- Anesthesia and Intensive Care, Department of Medicine - DIMED, Padua University Hospital, University of Padua, Padua, Italy
| | - Rihard Knafelj
- Center for Internal Intensive Medicine (MICU), University Medical Center Ljubljana, Ljubljana, Slovenia
| | - Paolo Pelosi
- Anesthesia and Intensive Care, San Martino Policlinico Hospital, IRCCS for Oncology and Neurosciences, Genoa, Italy
- Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Genoa, Italy
| | - Jordi Mancebo
- Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Laurent Brochard
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
| | - Tommaso Mauri
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy.
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14
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Sklienka P, Frelich M, Burša F. Patient Self-Inflicted Lung Injury-A Narrative Review of Pathophysiology, Early Recognition, and Management Options. J Pers Med 2023; 13:593. [PMID: 37108979 PMCID: PMC10146629 DOI: 10.3390/jpm13040593] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 03/22/2023] [Accepted: 03/27/2023] [Indexed: 03/31/2023] Open
Abstract
Patient self-inflicted lung injury (P-SILI) is a life-threatening condition arising from excessive respiratory effort and work of breathing in patients with lung injury. The pathophysiology of P-SILI involves factors related to the underlying lung pathology and vigorous respiratory effort. P-SILI might develop both during spontaneous breathing and mechanical ventilation with preserved spontaneous respiratory activity. In spontaneously breathing patients, clinical signs of increased work of breathing and scales developed for early detection of potentially harmful effort might help clinicians prevent unnecessary intubation, while, on the contrary, identifying patients who would benefit from early intubation. In mechanically ventilated patients, several simple non-invasive methods for assessing the inspiratory effort exerted by the respiratory muscles were correlated with respiratory muscle pressure. In patients with signs of injurious respiratory effort, therapy aimed to minimize this problem has been demonstrated to prevent aggravation of lung injury and, therefore, improve the outcome of such patients. In this narrative review, we accumulated the current information on pathophysiology and early detection of vigorous respiratory effort. In addition, we proposed a simple algorithm for prevention and treatment of P-SILI that is easily applicable in clinical practice.
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Affiliation(s)
- Peter Sklienka
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Ostrava, 17. listopadu 1790, 70800 Ostrava, Czech Republic
- Department of Intensive Medicine, Emergency Medicine and Forensic Studies, Faculty of Medicine, University of Ostrava, Syllabova 19, 70300 Ostrava, Czech Republic
- Institute of Physiology and Pathophysiology, Department of Intensive Care Medicine and Forensic Studies, Faculty of Medicine, University of Ostrava, Syllabova 19, 70300 Ostrava, Czech Republic
| | - Michal Frelich
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Ostrava, 17. listopadu 1790, 70800 Ostrava, Czech Republic
- Department of Intensive Medicine, Emergency Medicine and Forensic Studies, Faculty of Medicine, University of Ostrava, Syllabova 19, 70300 Ostrava, Czech Republic
| | - Filip Burša
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Ostrava, 17. listopadu 1790, 70800 Ostrava, Czech Republic
- Department of Intensive Medicine, Emergency Medicine and Forensic Studies, Faculty of Medicine, University of Ostrava, Syllabova 19, 70300 Ostrava, Czech Republic
- Institute of Physiology and Pathophysiology, Department of Intensive Care Medicine and Forensic Studies, Faculty of Medicine, University of Ostrava, Syllabova 19, 70300 Ostrava, Czech Republic
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15
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Phrenic Nerve Block and Respiratory Effort in Pigs and Critically Ill Patients with Acute Lung Injury. Anesthesiology 2022; 136:763-778. [PMID: 35348581 DOI: 10.1097/aln.0000000000004161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Strong spontaneous inspiratory efforts can be difficult to control and prohibit protective mechanical ventilation. Instead of using deep sedation and neuromuscular blockade, the authors hypothesized that perineural administration of lidocaine around the phrenic nerve would reduce tidal volume (VT) and peak transpulmonary pressure in spontaneously breathing patients with acute respiratory distress syndrome. METHODS An established animal model of acute respiratory distress syndrome with six female pigs was used in a proof-of-concept study. The authors then evaluated this technique in nine mechanically ventilated patients under pressure support exhibiting driving pressure greater than 15 cm H2O or VT greater than 10 ml/kg of predicted body weight. Esophageal and transpulmonary pressures, electrical activity of the diaphragm, and electrical impedance tomography were measured in pigs and patients. Ultrasound imaging and a nerve stimulator were used to identify the phrenic nerve, and perineural lidocaine was administered sequentially around the left and right phrenic nerves. RESULTS Results are presented as median [interquartile range, 25th to 75th percentiles]. In pigs, VT decreased from 7.4 ml/kg [7.2 to 8.4] to 5.9 ml/kg [5.5 to 6.6] (P < 0.001), as did peak transpulmonary pressure (25.8 cm H2O [20.2 to 27.2] to 17.7 cm H2O [13.8 to 18.8]; P < 0.001) and driving pressure (28.7 cm H2O [20.4 to 30.8] to 19.4 cm H2O [15.2 to 22.9]; P < 0.001). Ventilation in the most dependent part decreased from 29.3% [26.4 to 29.5] to 20.1% [15.3 to 20.8] (P < 0.001). In patients, VT decreased (8.2 ml/ kg [7.9 to 11.1] to 6.0 ml/ kg [5.7 to 6.7]; P < 0.001), as did driving pressure (24.7 cm H2O [20.4 to 34.5] to 18.4 cm H2O [16.8 to 20.7]; P < 0.001). Esophageal pressure, peak transpulmonary pressure, and electrical activity of the diaphragm also decreased. Dependent ventilation only slightly decreased from 11.5% [8.5 to 12.6] to 7.9% [5.3 to 8.6] (P = 0.005). Respiratory rate did not vary. Variables recovered 1 to 12.7 h [6.7 to 13.7] after phrenic nerve block. CONCLUSIONS Phrenic nerve block is feasible, lasts around 12 h, and reduces VT and driving pressure without changing respiratory rate in patients under assisted ventilation. EDITOR’S PERSPECTIVE
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16
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Lung- and Diaphragm-Protective Ventilation by Titrating Inspiratory Support to Diaphragm Effort: A Randomized Clinical Trial. Crit Care Med 2022; 50:192-203. [PMID: 35100192 PMCID: PMC8797006 DOI: 10.1097/ccm.0000000000005395] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
OBJECTIVES Lung- and diaphragm-protective ventilation is a novel concept that aims to limit the detrimental effects of mechanical ventilation on the diaphragm while remaining within limits of lung-protective ventilation. The premise is that low breathing effort under mechanical ventilation causes diaphragm atrophy, whereas excessive breathing effort induces diaphragm and lung injury. In a proof-of-concept study, we aimed to assess whether titration of inspiratory support based on diaphragm effort increases the time that patients have effort in a predefined "diaphragm-protective" range, without compromising lung-protective ventilation. DESIGN Randomized clinical trial. SETTING Mixed medical-surgical ICU in a tertiary academic hospital in the Netherlands. PATIENTS Patients (n = 40) with respiratory failure ventilated in a partially-supported mode. INTERVENTIONS In the intervention group, inspiratory support was titrated hourly to obtain transdiaphragmatic pressure swings in the predefined "diaphragm-protective" range (3-12 cm H2O). The control group received standard-of-care. MEASUREMENTS AND MAIN RESULTS Transdiaphragmatic pressure, transpulmonary pressure, and tidal volume were monitored continuously for 24 hours in both groups. In the intervention group, more breaths were within "diaphragm-protective" range compared with the control group (median 81%; interquartile range [64-86%] vs 35% [16-60%], respectively; p < 0.001). Dynamic transpulmonary pressures (20.5 ± 7.1 vs 18.5 ± 7.0 cm H2O; p = 0.321) and tidal volumes (7.56 ± 1.47 vs 7.54 ± 1.22 mL/kg; p = 0.961) were not different in the intervention and control group, respectively. CONCLUSIONS Titration of inspiratory support based on patient breathing effort greatly increased the time that patients had diaphragm effort in the predefined "diaphragm-protective" range without compromising tidal volumes and transpulmonary pressures. This study provides a strong rationale for further studies powered on patient-centered outcomes.
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Diaphragm function in acute respiratory failure and the potential role of phrenic nerve stimulation. Curr Opin Crit Care 2021; 27:282-289. [PMID: 33899818 DOI: 10.1097/mcc.0000000000000828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW The aim of this review was to describe the risk factors for developing diaphragm dysfunction, discuss the monitoring techniques for diaphragm activity and function, and introduce potential strategies to incorporate diaphragm protection into conventional lung-protective mechanical ventilation strategies. RECENT FINDINGS It is increasingly apparent that an approach that addresses diaphragm-protective ventilations goals is needed to optimize ventilator management and improve patient outcomes. Ventilator-induced diaphragm dysfunction (VIDD) is common and is associated with increased ICU length of stay, prolonged weaning and increased mortality. Over-assistance, under-assistance and patient-ventilator dyssynchrony may have important downstream clinical consequences related to VIDD. Numerous monitoring techniques are available to assess diaphragm function, including respiratory system pressures, oesophageal manometry, diaphragm ultrasound and electromyography. Novel techniques including phrenic nerve stimulation may facilitate the achievement of lung and diaphragm-protective goals for mechanical ventilation. SUMMARY Diaphragm protection is an important consideration in optimizing ventilator management in patients with acute respiratory failure. The delicate balance between lung and diaphragm-protective goals is challenging. Phrenic nerve stimulation may be uniquely situated to achieve and balance these two commonly conflicting goals.
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Ali Usman A, Gutsche J. Essential Topics in the Management of Venovenous Extracorporeal Membrane Oxygenation in COVID-19 Acute Respiratory Distress Syndrome. J Cardiothorac Vasc Anesth 2021; 35:2552-2555. [PMID: 34088550 PMCID: PMC8105130 DOI: 10.1053/j.jvca.2021.04.044] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Accepted: 04/28/2021] [Indexed: 01/08/2023]
Affiliation(s)
- Asad Ali Usman
- Department of Anesthesiology and Critical Care, Hospital of the University of Pennsylvania, University of Pennsylvania, Philadelphia, PA
| | - Jacob Gutsche
- Department of Anesthesiology and Critical Care, Hospital of the University of Pennsylvania, University of Pennsylvania, Philadelphia, PA
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19
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[Patient self-inflicted lung injury (P-SILI) : From pathophysiology to clinical evaluation with differentiated management]. Med Klin Intensivmed Notfmed 2021; 116:614-623. [PMID: 33961061 PMCID: PMC8103432 DOI: 10.1007/s00063-021-00823-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 03/19/2021] [Accepted: 03/23/2021] [Indexed: 02/08/2023]
Abstract
Die Etablierung der unterstützten Spontanatmung gilt allgemein als eine vorteilhafte und wenig gefährdende Phase der Beatmungstherapie. Allerdings geben neuere Erkenntnisse Hinweise auf eine potenzielle Schädigung durch exzessive Spontanatembemühungen vor allem bei akuter Lungenschädigung. Das Syndrom wird unter dem Begriff „patient self-inflicted lung injury“ zusammengefasst. Ärzte, Pflegepersonen und Atmungstherapeuten sollten für diese Thematik sensibilisiert werden. Parameter, die mittels Ösophagusdruckmessung oder einfacher Manöver am Respirator bestimmt werden können, sind bei der Entscheidung zur Durchführung und zur Überwachung von Spontanatmung auch in den akuten Phasen der Lungenschädigung hilfreich. Weiterhin gibt es im Umgang mit hohem Atemantrieb oder erhöhter Atemanstrengung therapeutische Möglichkeiten, diesen zu begegnen.
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20
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da Cruz DG, de Magalhães RF, Padilha GA, da Silva MC, Braga CL, Silva AR, Gonçalves de Albuquerque CF, Capelozzi VL, Samary CS, Pelosi P, Rocco PRM, Silva PL. Impact of positive biphasic pressure during low and high inspiratory efforts in Pseudomonas aeruginosa-induced pneumonia. PLoS One 2021; 16:e0246891. [PMID: 33577592 PMCID: PMC7880436 DOI: 10.1371/journal.pone.0246891] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 01/28/2021] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND During pneumonia, normal alveolar areas coexist adjacently with consolidated areas, and high inspiratory efforts may predispose to lung damage. To date, no study has evaluated different degrees of effort during Biphasic positive airway pressure (BIVENT) on lung and diaphragm damage in experimental pneumonia, though largely used in clinical setting. We aimed to evaluate lung damage, genes associated with ventilator-induced lung injury (VILI) and diaphragmatic injury, and blood bacteria in pressure-support ventilation (PSV), BIVENT with low and high inspiratory efforts in experimental pneumonia. MATERIAL AND METHODS Twenty-eight male Wistar rats (mean ± SD weight, 333±78g) were submitted Pseudomonas aeruginosa-induced pneumonia. After 24-h, animals were ventilated for 1h in: 1) PSV; 2) BIVENT with low (BIVENTLow-Effort); and 3) BIVENT with high inspiratory effort (BIVENTHigh-Effort). BIVENT was set at Phigh to achieve VT = 6 ml/kg and Plow at 5 cmH2O (n = 7/group). High- and low-effort conditions were obtained through anaesthetic infusion modulation based on neuromuscular drive (P0.1). Lung mechanics, histological damage score, blood bacteria, and expression of genes related to VILI in lung tissue, and inflammation in diaphragm tissue. RESULTS Transpulmonary peak pressure and histological damage score were higher in BIVENTHigh-Effort compared to BIVENTLow-Effort and PSV [16.1 ± 1.9cmH2O vs 12.8 ± 1.5cmH2O and 12.5 ± 1.6cmH2O, p = 0.015, and p = 0.010; median (interquartile range) 11 (9-13) vs 7 (6-9) and 7 (6-9), p = 0.021, and p = 0.029, respectively]. BIVENTHigh-Effort increased interleukin-6 expression compared to BIVENTLow-Effort (p = 0.035) as well as expressions of cytokine-induced neutrophil chemoattractant-1, amphiregulin, and type III procollagen compared to PSV (p = 0.001, p = 0.001, p = 0.004, respectively). Tumour necrosis factor-α expression in diaphragm tissue and blood bacteria were higher in BIVENTHigh-Effort than BIVENTLow-Effort (p = 0.002, p = 0.009, respectively). CONCLUSION BIVENT requires careful control of inspiratory effort to avoid lung and diaphragm damage, as well as blood bacteria. P0.1 might be considered a helpful parameter to optimize inspiratory effort.
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Affiliation(s)
- Daniela G. da Cruz
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Raquel F. de Magalhães
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Gisele A. Padilha
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Mariana C. da Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Cassia L. Braga
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Adriana R. Silva
- Laboratory of Immunopharmacology, Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil
| | | | - Vera L. Capelozzi
- Department of Pathology, School of Medicine, University of São Paulo, São Paulo, Brazil
| | - Cynthia S. Samary
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Paolo Pelosi
- Anesthesiology and Intensive Care, San Martino Policlinico Hospital, IRCCS for Oncology and Neurosciences, Genoa, Italy
- Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Genoa, Italy
| | - Patricia R. M. Rocco
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Pedro L. Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
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21
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PREVENTION OF RESPIRATORY MUSCLE DYSFUNCTION DUE TO DIAPHRAGM ATROPHY IN CHILDREN WITH RESPIRATORY FAILURE. EUREKA: HEALTH SCIENCES 2020. [DOI: 10.21303/2504-5679.2020.001525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The aim of the study was to determine whether diaphragm-protective mechanical ventilation can prevent diaphragm atrophy in children with respiratory failure. Materials and methods. We complete the prospective single-center cohort study. Data analysis included 82 patients 1 month - 18 years old, divided into I group (lung-protective MV) and II group (diaphragm-protective in addition to lung-protective MV). Patients were divided into age subgroups. Stages of the study: 1st day (d1), 3rd (d3), 5th (d5), 7th (d7), 9th (d9), 28th (d28). We studied changes in diaphragm thickness at the end of exhalation and compared them with these indicators at patient`s admission to the study (baseline). Primary endpoint was length of stay in ICU, secondary endpoints were complications (prolonged MV). Results are described as arithmetic mean (X) and standard deviation (σ) with level of significance p. Results. There were significant differences in length of stay in ICU among patients of the 1st and 5th age subgroups: in 1st age subgroup this data was in 1.3 times lower in II group, compared with I group (p <0,05); in 5th age subgroup the situation was the opposite - length of stay in ICU was in 1.4 times higher in II group, compared with I group (p<0.05). There were no patients who required lifelong mechanical ventilation in any of the groups. Changes in the thickness of the diaphragm, which indicate its atrophy, were the most significant among patients of the first, second, third and fourth age subgroups and the severity of atrophy was higher among patients of group I, compared with patients of group II. Conclusions. Diaphragm-protective mechanical ventilation significantly prevents diaphragm atrophy in children with respiratory failure in 2nd, 4th, and 5th age subgroups. Providing goal-directed diaphragm-protective MV might reduce the length of stay in ICU among patients of 1st and 5th age subgroups. There were no observed complications like lifelong mechanical ventilation in both patient`s group.
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22
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Goligher EC, Dres M, Patel BK, Sahetya SK, Beitler JR, Telias I, Yoshida T, Vaporidi K, Grieco DL, Schepens T, Grasselli G, Spadaro S, Dianti J, Amato M, Bellani G, Demoule A, Fan E, Ferguson ND, Georgopoulos D, Guérin C, Khemani RG, Laghi F, Mercat A, Mojoli F, Ottenheijm CAC, Jaber S, Heunks L, Mancebo J, Mauri T, Pesenti A, Brochard L. Lung- and Diaphragm-Protective Ventilation. Am J Respir Crit Care Med 2020; 202:950-961. [PMID: 32516052 DOI: 10.1164/rccm.202003-0655cp] [Citation(s) in RCA: 151] [Impact Index Per Article: 37.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Mechanical ventilation can cause acute diaphragm atrophy and injury, and this is associated with poor clinical outcomes. Although the importance and impact of lung-protective ventilation is widely appreciated and well established, the concept of diaphragm-protective ventilation has recently emerged as a potential complementary therapeutic strategy. This Perspective, developed from discussions at a meeting of international experts convened by PLUG (the Pleural Pressure Working Group) of the European Society of Intensive Care Medicine, outlines a conceptual framework for an integrated lung- and diaphragm-protective approach to mechanical ventilation on the basis of growing evidence about mechanisms of injury. We propose targets for diaphragm protection based on respiratory effort and patient-ventilator synchrony. The potential for conflict between diaphragm protection and lung protection under certain conditions is discussed; we emphasize that when conflicts arise, lung protection must be prioritized over diaphragm protection. Monitoring respiratory effort is essential to concomitantly protect both the diaphragm and the lung during mechanical ventilation. To implement lung- and diaphragm-protective ventilation, new approaches to monitoring, to setting the ventilator, and to titrating sedation will be required. Adjunctive interventions, including extracorporeal life support techniques, phrenic nerve stimulation, and clinical decision-support systems, may also play an important role in selected patients in the future. Evaluating the clinical impact of this new paradigm will be challenging, owing to the complexity of the intervention. The concept of lung- and diaphragm-protective ventilation presents a new opportunity to potentially improve clinical outcomes for critically ill patients.
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Affiliation(s)
- Ewan C Goligher
- Interdepartmental Division of Critical Care Medicine.,Division of Respirology, Department of Medicine, University Health Network, Toronto, Ontario, Canada.,Toronto General Hospital Research Institute, Toronto, Ontario, Canada
| | - Martin Dres
- Service de Pneumologie, Médecine Intensive et Réanimation (Département R3S), Assistance Publique-Hopitaux de Paris, Groupe Hospitalier Universitaire APHP-Sorbonne Université, site Pitié-Salpêtrière, Paris, France.,Unite Mixte de Recherche-Sorbonne 1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Institut National de la Sante et de la Recherche Medicale, Sorbonne Université, Paris, France
| | - Bhakti K Patel
- Section of Pulmonary and Critical Care, Department of Medicine, University of Chicago, Chicago, Illinois
| | - Sarina K Sahetya
- Division of Pulmonary and Critical Care Medicine, School of Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Jeremy R Beitler
- Division of Pulmonary, Allergy, and Critical Care Medicine, Center for Acute Respiratory Failure, College of Physicians and Surgeons, Columbia University, New York, New York
| | - Irene Telias
- Interdepartmental Division of Critical Care Medicine.,Division of Respirology, Department of Medicine, University Health Network, Toronto, Ontario, Canada.,Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
| | - Takeshi Yoshida
- Department of Anesthesiology and Intensive Care Medicine, Graduate School of Medicine, Osaka University, Suita, Japan
| | - Katerina Vaporidi
- Department of Intensive Care Medicine, University Hospital of Heraklion, Medical School, University of Crete, Heraklion, Greece
| | - Domenico Luca Grieco
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy.,Dipartimento di Medicina d'Urgenza e di Terapia Intensiva e Anestesia, Fondazione Policlinico Universitario, A. Gemelli Istituto di Ricovero e Cura a Carattere Scientifico, Rome, Italy
| | - Tom Schepens
- Department of Critical Care Medicine, Antwerp University Hospital, Antwerp, Belgium
| | - Giacomo Grasselli
- Department of Anesthesiology, Intensive Care and Emergency, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.,Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Savino Spadaro
- Department Morphology, Surgery and Experimental Medicine, ICU, St. Anne's Archbishop Hospital, University of Ferrara, Ferrara, Italy
| | - Jose Dianti
- Interdepartmental Division of Critical Care Medicine.,Division of Respirology, Department of Medicine, University Health Network, Toronto, Ontario, Canada.,Intensive Care Unit, Department of Medicine, Italian Hospital of Buenos Aires, Buenos Aires, Argentina
| | - Marcelo Amato
- Laboratório de Pneumologia, Laboratório de Investicação Médica 9, Disciplina de Pneumologia, Instituto do Coração, Hospital das Clínicas da Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Giacomo Bellani
- Department of Medicine and Surgery, University of Milan-Bicocca, Monza, Italy
| | - Alexandre Demoule
- Service de Pneumologie, Médecine Intensive et Réanimation (Département R3S), Assistance Publique-Hopitaux de Paris, Groupe Hospitalier Universitaire APHP-Sorbonne Université, site Pitié-Salpêtrière, Paris, France.,Unite Mixte de Recherche-Sorbonne 1158 Neurophysiologie Respiratoire Expérimentale et Clinique, Institut National de la Sante et de la Recherche Medicale, Sorbonne Université, Paris, France
| | - Eddy Fan
- Interdepartmental Division of Critical Care Medicine.,Institute for Health Policy, Management, and Evaluation, and.,Division of Respirology, Department of Medicine, University Health Network, Toronto, Ontario, Canada.,Toronto General Hospital Research Institute, Toronto, Ontario, Canada
| | - Niall D Ferguson
- Interdepartmental Division of Critical Care Medicine.,Institute for Health Policy, Management, and Evaluation, and.,Department of Physiology, University of Toronto, Toronto, Ontario, Canada.,Division of Respirology, Department of Medicine, University Health Network, Toronto, Ontario, Canada.,Toronto General Hospital Research Institute, Toronto, Ontario, Canada
| | - Dimitrios Georgopoulos
- Department of Intensive Care Medicine, University Hospital of Heraklion, Medical School, University of Crete, Heraklion, Greece
| | - Claude Guérin
- Médecine Intensive-Réanimation, Hopital Edouard Herriot Lyon, Faculté de Médecine Lyon-Est, Université de Lyon, Institut National de la Santé et de la Recherche Médicale 955 Créteil, Lyon, France
| | - Robinder G Khemani
- Department of Anesthesiology and Critical Care, Children's Hospital Los Angeles, Los Angeles, California.,Department of Pediatrics, University of Southern California, Los Angeles, California
| | - Franco Laghi
- Division of Pulmonary and Critical Care Medicine, Stritch School of Medicine, Loyola University, Maywood, Illinois.,Division of Pulmonary and Critical Care Medicine, Hines Veterans Affairs Hospital, Hines, Illinois
| | - Alain Mercat
- Département de Médecine Intensive-Réanimation et Médecine Hyperbare, Centre Hospitalier d'Angers, Angers, France
| | - Francesco Mojoli
- Department of Anesthesia and Intensive Care, Scientific Hospitalization and Care Institute, San Matteo Polyclinic Foundation, University of Pavia, Pavia, Italy
| | | | - Samir Jaber
- Anesthesiology and Intensive Care, Anesthesia and Critical Care Department B, Saint Eloi Teaching Hospital, PhyMedExp, Montpellier University Hospital Center, University of Montpellier, Joint Research Unit 9214, National Institute of Health and Medical Research U1046, National Scientific Research Center, Montpellier, France; and
| | - Leo Heunks
- Department of Intensive Care, Vrije University Location, Amsterdam University Medical Center, Amsterdam, the Netherlands
| | - Jordi Mancebo
- Servei de Medicina Intensiva Hospital de Sant Pau, Barcelona, Spain
| | - Tommaso Mauri
- Dipartimento di Medicina d'Urgenza e di Terapia Intensiva e Anestesia, Fondazione Policlinico Universitario, A. Gemelli Istituto di Ricovero e Cura a Carattere Scientifico, Rome, Italy.,Department of Critical Care Medicine, Antwerp University Hospital, Antwerp, Belgium
| | - Antonio Pesenti
- Dipartimento di Medicina d'Urgenza e di Terapia Intensiva e Anestesia, Fondazione Policlinico Universitario, A. Gemelli Istituto di Ricovero e Cura a Carattere Scientifico, Rome, Italy.,Department of Critical Care Medicine, Antwerp University Hospital, Antwerp, Belgium
| | - Laurent Brochard
- Interdepartmental Division of Critical Care Medicine.,Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
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23
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Abstract
Neuromuscular blocking agents (NMBAs) inhibit patient-initiated active breath and the risk of high tidal volumes and consequent high transpulmonary pressure swings, and minimize patient/ ventilator asynchrony in acute respiratory distress syndrome (ARDS). Minimization of volutrauma and ventilator-induced lung injury (VILI) results in a lower incidence of barotrauma, improved oxygenation and a decrease in circulating proinflammatory markers. Recent randomized clinical trials did not reveal harmful muscular effects during a short course of NMBAs. The use of NMBAs should be considered during the early phase of severe ARDS for patients to facilitate lung protective ventilation or prone positioning only after optimising mechanical ventilation and sedation. The use of NMBAs should be integrated in a global strategy including the reduction of tidal volume, the rational use of PEEP, prone positioning and the use of a ventilatory mode allowing spontaneous ventilation as soon as possible. Partial neuromuscular blockade should be evaluated in future trials.
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24
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Goligher EC, Jonkman AH, Dianti J, Vaporidi K, Beitler JR, Patel BK, Yoshida T, Jaber S, Dres M, Mauri T, Bellani G, Demoule A, Brochard L, Heunks L. Clinical strategies for implementing lung and diaphragm-protective ventilation: avoiding insufficient and excessive effort. Intensive Care Med 2020; 46:2314-2326. [PMID: 33140181 PMCID: PMC7605467 DOI: 10.1007/s00134-020-06288-9] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 10/08/2020] [Indexed: 12/12/2022]
Abstract
Mechanical ventilation may have adverse effects on both the lung and the diaphragm. Injury to the lung is mediated by excessive mechanical stress and strain, whereas the diaphragm develops atrophy as a consequence of low respiratory effort and injury in case of excessive effort. The lung and diaphragm-protective mechanical ventilation approach aims to protect both organs simultaneously whenever possible. This review summarizes practical strategies for achieving lung and diaphragm-protective targets at the bedside, focusing on inspiratory and expiratory ventilator settings, monitoring of inspiratory effort or respiratory drive, management of dyssynchrony, and sedation considerations. A number of potential future adjunctive strategies including extracorporeal CO2 removal, partial neuromuscular blockade, and neuromuscular stimulation are also discussed. While clinical trials to confirm the benefit of these approaches are awaited, clinicians should become familiar with assessing and managing patients’ respiratory effort, based on existing physiological principles. To protect the lung and the diaphragm, ventilation and sedation might be applied to avoid excessively weak or very strong respiratory efforts and patient-ventilator dysynchrony.
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Affiliation(s)
- Ewan C Goligher
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada.,Department of Medicine, Division of Respirology, University Health Network, Toronto, Canada.,Toronto General Hospital Research Institute, Toronto, Canada
| | - Annemijn H Jonkman
- Department of Intensive Care, Amsterdam UMC, Location VUmc, De Boelelaan 1117, 1081 HV, Amsterdam, the Netherlands.,Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada
| | - Jose Dianti
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada.,Department of Medicine, Division of Respirology, University Health Network, Toronto, Canada
| | - Katerina Vaporidi
- Department of Intensive Care Medicine, University Hospital of Heraklion, Medical School, University of Crete, Heraklion, Greece
| | - Jeremy R Beitler
- Center for Acute Respiratory Failure, Division of Pulmonary, Allergy, and Critical Care Medicine, Columbia University College of Physicians and Surgeons, New York, NY, USA
| | - Bhakti K Patel
- Department of Medicine, Section of Pulmonary and Critical Care, University of Chicago, Chicago, IL, USA
| | - Takeshi Yoshida
- Department of Anesthesiology and Intensive Care Medicine, Osaka University Graduate School of Medicine, Suita, Japan
| | - Samir Jaber
- Critical Care and Anesthesia Department (DAR B), Hôpital Saint-Éloi, CHU de Montpellier, PhyMedExp, Université de Montpellier, Montpellier, France
| | - Martin Dres
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, 75005, Paris, France.,Service de Pneumologie, Médecine Intensive et Réanimation (Département R3S), AP-HP, Groupe Hospitalier Universitaire APHP-Sorbonne Université, Site Pitié-Salpêtrière, 75013, Paris, France
| | - Tommaso Mauri
- Department of Anesthesiology, Intensive Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.,Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Giacomo Bellani
- Department of Medicine and Surgery, University of Milan-Bicocca, Via Cadore 48, Monza, MB, Italy
| | - Alexandre Demoule
- Sorbonne Université, INSERM, UMRS1158 Neurophysiologie Respiratoire Expérimentale et Clinique, 75005, Paris, France.,Service de Pneumologie, Médecine Intensive et Réanimation (Département R3S), AP-HP, Groupe Hospitalier Universitaire APHP-Sorbonne Université, Site Pitié-Salpêtrière, 75013, Paris, France
| | - Laurent Brochard
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada.,Keenan Centre for Biomedical Research, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Canada
| | - Leo Heunks
- Department of Intensive Care, Amsterdam UMC, Location VUmc, De Boelelaan 1117, 1081 HV, Amsterdam, the Netherlands.
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25
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Colombo J, Spinelli E, Grasselli G, Pesenti AM, Protti A. Detection of strong inspiratory efforts from the analysis of central venous pressure swings: a preliminary clinical study. Minerva Anestesiol 2020; 86:1296-1304. [PMID: 32755084 DOI: 10.23736/s0375-9393.20.14323-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Swings of central venous pressure (ΔCVP) may reflect those of pleural and esophageal (ΔPES) pressure and, therefore, the strength of inspiration. Strong inspiratory efforts can produce some harm. Herein we preliminarily assessed the diagnostic accuracy of ΔCVP for strong inspiratory efforts in critically-ill subjects breathing spontaneously. METHODS We measured ΔCVP and ΔPES in 48 critically-ill subjects breathing spontaneously with zero end-expiratory pressure (ZEEP) or 10 cmH<inf>2</inf>O of continuous positive airway pressure (CPAP). The overall diagnostic accuracy of ΔCVP for strong inspiratory efforts (arbitrarily defined as ΔPES >8 mmHg) was described as the area under the receiver operating characteristic (ROC) curve, with 0.50 indicating random guess. The agreement between ΔCVP and ΔPES was assessed with the Bland-Altman analysis. RESULTS ΔCVP recognized strong inspiratory efforts with an area under the ROC curve of 0.95 (95% confidence intervals, 0.85-0.99) with ZEEP and 0.89 (0.76-0.96) with CPAP, both significantly larger than 0.50 (P<0.001). With the best cut-off value around 8 mmHg, the diagnostic accuracy of ΔCVP was 0.92 (0.80-0.98) with ZEEP and 0.94 (0.83-0.99) with CPAP. With ZEEP, the median difference between ΔCVP and ΔPES (bias) was -0.2 mmHg, and the 95% limits of agreement (LoA) were -3.9 and +5.5 mmHg. With CPAP, bias was -0.1 mmHg, and 95%-LoA were -5.8 and +4.5 mmHg. In both cases, ΔCVP correlated with ΔPES (r<inf>s</inf> 0.81 and 0.67; P<0.001 for both). CONCLUSIONS In critically-ill subjects breathing spontaneously, ΔCVP recognized strong inspiratory efforts with acceptable accuracy. Even so, it sometimes largely differed from ∆PES.
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Affiliation(s)
- Jacopo Colombo
- Department of CardioThoracoVascular Anesthesia and Intensive Care, ASST Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Elena Spinelli
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Giacomo Grasselli
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy.,Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Antonio M Pesenti
- Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy.,Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Alessandro Protti
- Department of Anesthesia and Intensive Care Unit, Humanitas Clinical and Research Center - IRCCS, Rozzano, Milan, Italy -
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26
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Abstract
Neuromuscular blockade with deep sedation appears to offer no advantage to patients with acute respiratory distress syndrome who can be managed with lighter sedation. In those patients requiring deep sedation, the addition of neuromuscular blockade may be beneficial.
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27
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Roesthuis LH, van der Hoeven JG, van Hees HWH, Schellekens WJM, Doorduin J, Heunks LMA. Recruitment pattern of the diaphragm and extradiaphragmatic inspiratory muscles in response to different levels of pressure support. Ann Intensive Care 2020; 10:67. [PMID: 32472272 PMCID: PMC7256918 DOI: 10.1186/s13613-020-00684-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 05/16/2020] [Indexed: 01/16/2023] Open
Abstract
Background Inappropriate ventilator assist plays an important role in the development of diaphragm dysfunction. Ventilator under-assist may lead to muscle injury, while over-assist may result in muscle atrophy. This provides a good rationale to monitor respiratory drive in ventilated patients. Respiratory drive can be monitored by a nasogastric catheter, either with esophageal balloon to determine muscular pressure (gold standard) or with electrodes to measure electrical activity of the diaphragm. A disadvantage is that both techniques are invasive. Therefore, it is interesting to investigate the role of surrogate markers for respiratory dive, such as extradiaphragmatic inspiratory muscle activity. The aim of the current study was to investigate the effect of different inspiratory support levels on the recruitment pattern of extradiaphragmatic inspiratory muscles with respect to the diaphragm and to evaluate agreement between activity of extradiaphragmatic inspiratory muscles and the diaphragm. Methods Activity from the alae nasi, genioglossus, scalene, sternocleidomastoid and parasternal intercostals was recorded using surface electrodes. Electrical activity of the diaphragm was measured using a multi-electrode nasogastric catheter. Pressure support (PS) levels were reduced from 15 to 3 cmH2O every 5 min with steps of 3 cmH2O. The magnitude and timing of respiratory muscle activity were assessed. Results We included 17 ventilated patients. Diaphragm and extradiaphragmatic inspiratory muscle activity increased in response to lower PS levels (36 ± 6% increase for the diaphragm, 30 ± 6% parasternal intercostals, 41 ± 6% scalene, 40 ± 8% sternocleidomastoid, 43 ± 6% alae nasi and 30 ± 6% genioglossus). Changes in diaphragm activity correlated best with changes in alae nasi activity (r2 = 0.49; P < 0.001), while there was no correlation between diaphragm and sternocleidomastoid activity. The agreement between diaphragm and extradiaphragmatic inspiratory muscle activity was low due to a high individual variability. Onset of alae nasi activity preceded the onset of all other muscles. Conclusions Extradiaphragmatic inspiratory muscle activity increases in response to lower inspiratory support levels. However, there is a poor correlation and agreement with the change in diaphragm activity, limiting the use of surface electromyography (EMG) recordings of extradiaphragmatic inspiratory muscles as a surrogate for electrical activity of the diaphragm.
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Affiliation(s)
- L H Roesthuis
- Department of Intensive Care Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - J G van der Hoeven
- Department of Intensive Care Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - H W H van Hees
- Department of Pulmonary Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
| | | | - J Doorduin
- Donders Institute for Brain, Cognition and Behaviour, Department of Neurology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - L M A Heunks
- Department of Intensive Care Medicine, Amsterdam UMC, Location VUmc, Postbox 7057, 1007 MB, Amsterdam, The Netherlands.
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Jonkman AH, de Vries HJ, Heunks LMA. Physiology of the Respiratory Drive in ICU Patients: Implications for Diagnosis and Treatment. Crit Care 2020; 24:104. [PMID: 32204710 PMCID: PMC7092542 DOI: 10.1186/s13054-020-2776-z] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
This article is one of ten reviews selected from the Annual Update in Intensive Care and Emergency Medicine 2020. Other selected articles can be found online at https://www.biomedcentral.com/collections/annualupdate2020. Further information about the Annual Update in Intensive Care and Emergency Medicine is available from http://www.springer.com/series/8901.
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Affiliation(s)
- Annemijn H Jonkman
- Department of Intensive Care Medicine, Amsterdam UMC, Location VUmc, Amsterdam, The Netherlands
- Amsterdam Cardiovascular Sciences Research Institute, Amsterdam UMC, Amsterdam, The Netherlands
| | - Heder J de Vries
- Department of Intensive Care Medicine, Amsterdam UMC, Location VUmc, Amsterdam, The Netherlands
- Amsterdam Cardiovascular Sciences Research Institute, Amsterdam UMC, Amsterdam, The Netherlands
| | - Leo M A Heunks
- Department of Intensive Care Medicine, Amsterdam UMC, Location VUmc, Amsterdam, The Netherlands.
- Amsterdam Cardiovascular Sciences Research Institute, Amsterdam UMC, Amsterdam, The Netherlands.
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29
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Impact of spontaneous breathing during mechanical ventilation in acute respiratory distress syndrome. Curr Opin Crit Care 2020; 25:192-198. [PMID: 30720482 DOI: 10.1097/mcc.0000000000000597] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW Facilitating spontaneous breathing has been traditionally recommended during mechanical ventilation in acute respiratory distress syndrome (ARDS). However, early, short-term use of neuromuscular blockade appears to improve survival, and spontaneous effort has been shown to potentiate lung injury in animal and clinical studies. The purpose of this review is to describe the beneficial and deleterious effects of spontaneous breathing in ARDS, explain potential mechanisms for harm, and provide contemporary suggestions for clinical management. RECENT FINDINGS Gentle spontaneous effort can improve lung function and prevent diaphragm atrophy. However, accumulating evidence indicates that spontaneous effort may cause or worsen lung and diaphragm injury, especially if the ARDS is severe or spontaneous effort is vigorous. Recently, such effort-dependent lung injury has been termed patient self-inflicted lung injury (P-SILI). Finally, several approaches to minimize P-SILI while maintaining some diaphragm activity (e.g. partial neuromuscular blockade, high PEEP) appear promising. SUMMARY We update and summarize the role of spontaneous breathing during mechanical ventilation in ARDS, which can be beneficial or deleterious, depending on the strength of spontaneous activity and severity of lung injury. Future studies are needed to determine ventilator strategies that minimize injury but maintaining some diaphragm activity.
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30
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Spinelli E, Mauri T, Beitler JR, Pesenti A, Brodie D. Respiratory drive in the acute respiratory distress syndrome: pathophysiology, monitoring, and therapeutic interventions. Intensive Care Med 2020; 46:606-618. [PMID: 32016537 PMCID: PMC7224136 DOI: 10.1007/s00134-020-05942-6] [Citation(s) in RCA: 131] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 01/16/2020] [Indexed: 12/18/2022]
Abstract
Neural respiratory drive, i.e., the activity of respiratory centres controlling breathing, is an overlooked physiologic variable which affects the pathophysiology and the clinical outcome of acute respiratory distress syndrome (ARDS). Spontaneous breathing may offer multiple physiologic benefits in these patients, including decreased need for sedation, preserved diaphragm activity and improved cardiovascular function. However, excessive effort to breathe due to high respiratory drive may lead to patient self-inflicted lung injury (P-SILI), even in the absence of mechanical ventilation. In the present review, we focus on the physiological and clinical implications of control of respiratory drive in ARDS patients. We summarize the main determinants of neural respiratory drive and the mechanisms involved in its potentiation, in health and ARDS. We also describe potential and pitfalls of the available bedside methods for drive assessment and explore classical and more “futuristic” interventions to control drive in ARDS patients.
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Affiliation(s)
- Elena Spinelli
- Dipartimento di Anestesia, Rianimazione ed Emergenza-Urgenza, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Università Degli Studi Di Milano, Via F. Sforza 35, 20122, Milan, Italy
| | - Tommaso Mauri
- Dipartimento di Anestesia, Rianimazione ed Emergenza-Urgenza, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Università Degli Studi Di Milano, Via F. Sforza 35, 20122, Milan, Italy. .,Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy.
| | - Jeremy R Beitler
- Center for Acute Respiratory Failure, Division of Pulmonary, Allergy, and Critical Care Medicine, Columbia University College of Physicians and Surgeons/New York-Presbyterian Hospital, New York, NY, USA
| | - Antonio Pesenti
- Dipartimento di Anestesia, Rianimazione ed Emergenza-Urgenza, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Università Degli Studi Di Milano, Via F. Sforza 35, 20122, Milan, Italy.,Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Daniel Brodie
- Center for Acute Respiratory Failure, Division of Pulmonary, Allergy, and Critical Care Medicine, Columbia University College of Physicians and Surgeons/New York-Presbyterian Hospital, New York, NY, USA
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31
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Hua Y, Ou X, Li Q, Zhu T. Neuromuscular blockers in the acute respiratory distress syndrome: A meta-analysis. PLoS One 2020; 15:e0227664. [PMID: 31961896 PMCID: PMC6974254 DOI: 10.1371/journal.pone.0227664] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 12/24/2019] [Indexed: 02/05/2023] Open
Abstract
Background The effects of neuromuscular blocking agents (NMBAs) on adult patients with acute respiratory distress syndrome (ARDS) remain unclear. We performed a meta-analysis of randomized controlled trials (RCTs) to evaluate its effect on mortality. Methods We searched the Cochrane (Central) database, Medline, Embase, the Chinese Biomedical Literature Database (SinoMed), WanFang data and ClinicalTrials from inception to June 2019, with language restriction to English and Chinese. We included published RCTs and eligible clinical trials from ClinicalTrials.gov that compared NMBAs with placebo or usual treatment in adults with ARDS. We pooled data using random-effects models. The primary outcome was mortality. The secondary outcomes were the ratio of the partial pressure of arterial oxygen to the fraction of inspired oxygen (PaO2/FIO2), total positive end expiratory pressure (PEEP), plateau pressure (Pplat), days free of ventilator at day 28, barotrauma and ICU-acquired weakness. Results We included 6 RCTs (n = 1557). Compared with placebo or usual treatment, NMBAs were associated with lower 21 to 28-day mortality (RR 0.72, 95% CI 0.53–0.97, I2 = 59%). NMBAs significantly improved oxygenation (Pao2:Fio2 ratios) at 48 hours (MD 27.26 mm Hg, 95% CI 1.67, 52.84, I2 = 92%) and reduced the incidence of barotrauma (RR 0.55, 95% CI 0.35, 0.85, I2 = 0). However, NMBAs had no effect on oxygenation (Pao2:Fio2 ratios) (MD 18.41 mm Hg, 95% CI -0.33, 37.14, I2 = 72%) at 24 hours. We also found NMBAs did not affect total PEEP, plateau pressure, days free of ventilation at day 28 and ICU-acquired weakness. Conclusions In patients with moderate-to-severe ARDS, the administration of NMBAs could reduce 21 to 28-day mortality and barotrauma, and improve oxygenation at 48 hours, but have no significant effects on 90-day/ICU mortality, days free of ventilation at day 28 and the risk of ICU-acquired weakness. Further large-scale, high-quality RCTs are needed to confirm our findings. Registration: PROSPERO (ID: CRD 42019139656).
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Affiliation(s)
- Yusi Hua
- Department of Anesthesiology, West China Hospital of Sichuan University, Chengdu, Sichuan, China
| | - Xiaofeng Ou
- Department of Critical Care, West China Hospital of Sichuan University, Chengdu, Sichuan, China
| | - Qian Li
- Department of Anesthesiology, West China Hospital of Sichuan University, Chengdu, Sichuan, China
| | - Tao Zhu
- Department of Anesthesiology, West China Hospital of Sichuan University, Chengdu, Sichuan, China
- * E-mail:
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32
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Satici C, López-Padilla D, Schreiber A, Kharat A, Swingwood E, Pisani L, Patout M, Bos LD, Scala R, Schultz MJ, Heunks L. ERS International Congress, Madrid, 2019: highlights from the Respiratory Intensive Care Assembly. ERJ Open Res 2020; 6:00331-2019. [PMID: 32166088 PMCID: PMC7061203 DOI: 10.1183/23120541.00331-2019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 01/23/2020] [Indexed: 12/19/2022] Open
Abstract
The Respiratory Intensive Care Assembly of the European Respiratory Society is delighted to present the highlights from the 2019 International Congress in Madrid, Spain. We have selected four sessions that discussed recent advances in a wide range of topics: from acute respiratory failure to cough augmentation in neuromuscular disorders and from extra-corporeal life support to difficult ventilator weaning. The subjects are summarised by early career members in close collaboration with the Assembly leadership. We aim to give the reader an update on the most important developments discussed at the conference. Each session is further summarised into a short list of take-home messages.
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Affiliation(s)
- Celal Satici
- Respiratory Medicine, Istanbul Gaziosmanpasa Training and Research Hospital, Health Science University, Istanbul, Turkey
| | - Daniel López-Padilla
- Respiratory Dept, Gregorio Marañón University Hospital, Spanish Sleep Network, Madrid, Spain
| | - Annia Schreiber
- Interdepartmental Division of Critical Care, University of Toronto, Unity Health Toronto (St Michael's Hospital) and the Li Ka Shing Knowledge Institute, Toronto, Canada
| | - Aileen Kharat
- Pulmonology Dept, Hôpitaux Universitaires de Genève, Geneva, Switzerland
| | - Ema Swingwood
- University Hospitals Bristol NHS Foundation Trust, Adult Therapy Services, Bristol Royal Infirmary, Bristol, UK
| | - Luigi Pisani
- Intensive Care, Amsterdam UMC, Location AMC, University of Amsterdam, Amsterdam, the Netherlands
| | | | - Lieuwe D. Bos
- Intensive Care, Amsterdam UMC, Location AMC, University of Amsterdam, Amsterdam, the Netherlands
- Respiratory Medicine, Amsterdam UMC, Location AMC, University of Amsterdam, Amsterdam, the Netherlands
| | - Raffaele Scala
- Pulmonology and Respiratory Intensive Care Unit, S. Donato Hospital, Arezzo, Italy
| | - Marcus J. Schultz
- Intensive Care, Amsterdam UMC, Location AMC, University of Amsterdam, Amsterdam, the Netherlands
- Mahidol-Oxford Tropical Medicine Research Unit (MORU), Mahidol University, Bangkok, Thailand
- Nuffield Dept of Medicine, University of Oxford, Oxford, UK
| | - Leo Heunks
- Intensive Care, Amsterdam UMC, Location VUmc, Amsterdam, the Netherlands
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33
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Vaporidi K, Akoumianaki E, Telias I, Goligher EC, Brochard L, Georgopoulos D. Respiratory Drive in Critically Ill Patients. Pathophysiology and Clinical Implications. Am J Respir Crit Care Med 2020; 201:20-32. [DOI: 10.1164/rccm.201903-0596so] [Citation(s) in RCA: 97] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- Katerina Vaporidi
- Department of Intensive Care Medicine, University Hospital of Heraklion, Medical School University of Crete, Heraklion, Greece
| | - Evangelia Akoumianaki
- Department of Intensive Care Medicine, University Hospital of Heraklion, Medical School University of Crete, Heraklion, Greece
| | - Irene Telias
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada
- Keenan Research Center and Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada
| | - Ewan C. Goligher
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada
- Department of Medicine, University Health Network, Toronto, Ontario, Canada; and
- Toronto General Hospital Research Institute, Toronto, Ontario, Canada
| | - Laurent Brochard
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada
- Keenan Research Center and Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Toronto, Ontario, Canada
| | - Dimitris Georgopoulos
- Department of Intensive Care Medicine, University Hospital of Heraklion, Medical School University of Crete, Heraklion, Greece
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34
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Akoumianaki E, Vaporidi K, Georgopoulos D. The Injurious Effects of Elevated or Nonelevated Respiratory Rate during Mechanical Ventilation. Am J Respir Crit Care Med 2019; 199:149-157. [PMID: 30199652 DOI: 10.1164/rccm.201804-0726ci] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Respiratory rate is one of the key variables that is set and monitored during mechanical ventilation. As part of increasing efforts to optimize mechanical ventilation, it is prudent to expand understanding of the potential harmful effects of not only volume and pressures but also respiratory rate. The mechanisms by which respiratory rate may become injurious during mechanical ventilation can be distinguished in two broad categories. In the first, well-recognized category, concerning both controlled and assisted ventilation, the respiratory rate per se may promote ventilator-induced lung injury, dynamic hyperinflation, ineffective efforts, and respiratory alkalosis. It may also be misinterpreted as distress delaying the weaning process. In the second category, which concerns only assisted ventilation, the respiratory rate may induce injury in a less apparent way by remaining relatively quiescent while being challenged by chemical feedback. By responding minimally to chemical feedback, respiratory rate leaves the control of V. e almost exclusively to inspiratory effort. In such cases, when assist is high, weak inspiratory efforts promote ineffective triggering, periodic breathing, and diaphragmatic atrophy. Conversely, when assist is low, diaphragmatic efforts are intense and increase the risk for respiratory distress, asynchronies, ventilator-induced lung injury, diaphragmatic injury, and cardiovascular complications. This review thoroughly presents the multiple mechanisms by which respiratory rate may induce injury during mechanical ventilation, drawing the attention of critical care physicians to the potential injurious effects of respiratory rate insensitivity to chemical feedback during assisted ventilation.
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Affiliation(s)
- Evangelia Akoumianaki
- 1 Intensive Care Medicine Department, University Hospital of Heraklion, Medical School, University of Crete, Heraklion, Crete, Greece
| | - Katerina Vaporidi
- 1 Intensive Care Medicine Department, University Hospital of Heraklion, Medical School, University of Crete, Heraklion, Crete, Greece
| | - Dimitris Georgopoulos
- 1 Intensive Care Medicine Department, University Hospital of Heraklion, Medical School, University of Crete, Heraklion, Crete, Greece
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35
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Neuromuscular blocking agents for adult patients with acute respiratory distress syndrome: A meta-analysis of randomized controlled trials. J Trauma Acute Care Surg 2019; 85:1102-1109. [PMID: 30462621 DOI: 10.1097/ta.0000000000002057] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND To explore the effect of neuromuscular blocking agents (NMBAs) on adult patients with acute respiratory distress syndrome (ARDS) by meta-analysis. METHODS Three databases including Cochrane central register of controlled trials, PubMed, and Wanfang Data were searched to find relevant articles. We included randomized controlled trials that evaluated NMBAs compared with placebo or usual treatment in adult patients with ARDS. RESULTS Five trials totaling 551 patients were identified eligible for inclusion. All the five trials were protective ventilation strategies based. All patients (the ratio of partial pressure of arterial oxygen/fraction of inspired oxygen ≤ 200 mm Hg) met American-European Consensus Conference or the Berlin definition oxygenation criteria for ARDS. Neuromuscular blocking agents significantly reduced intensive care unit mortality (relative risk, 0.73; 95% confidence intervals [CI], 0.58-0.93; p = 0.009; I = 0.0%; 4 trials, 455 patients) and 21- to 28-day mortality (relative risk, 0.63; 95% CI, 0.49-0.82; p = 0.001; I = 0.0%; 4 trials, 527 patients). At 48 hours, NMBAs improved oxygenation (weighted mean differences [WMD], 27.98; 95% CI, 7.45-48.51; p = 0.008; I = 44.2%; 4 trials, 212 patients). However, NMBAs have no effect on reduction of oxygenation at 24 hours (WMD, 26.83; 95% CI, -5.89 to 59.55; p = 0.108; I = 82.4%; 4 trials, 447 patients), and plateau pressure (WMD, 0.43; 95% CI, -0.46 to 1.31; p = 0.345; 4 trials, 455 patients) as well as positive end expiratory pressure (WMD, 0.10; 95% CI, -0.47 to 0.67; p = 0.73; 4 trials, 455 patients) at 48 hours. CONCLUSION Protective ventilation strategies based NMBAs treatment reduces mortality in patients with moderate to severe ARDS. LEVEL OF EVIDENCE Systematic reviews & meta-analysis, level III.
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36
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Thille AW, Mauri T, Talmor D. Update in Critical Care Medicine 2017. Am J Respir Crit Care Med 2019; 197:1382-1388. [PMID: 29554433 DOI: 10.1164/rccm.201801-0055up] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Arnaud W Thille
- 1 Réanimation Médicale, Centre Hospitalier Universitaire de Poitiers, Poitiers, France.,2 INSERM Centre d'Investigation Clinique 1402 ALIVE, Faculté de Médecine et Pharmacie, Université de Poitiers, Poitiers, France
| | - Tommaso Mauri
- 3 Department of Anesthesia, Critical Care and Emergency, Maggiore Policlinico Hospital, University of Milan, Milan, Italy; and
| | - Daniel Talmor
- 4 Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston Massachusetts
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37
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Langer T, Baio S, Chidini G, Marchesi T, Grasselli G, Pesenti A, Calderini E. Severe diaphragmatic dysfunction with preserved activity of accessory respiratory muscles in a critically ill child: a case report of failure of neurally adjusted ventilatory assist (NAVA) and successful support with pressure support ventilation (PSV). BMC Pediatr 2019; 19:155. [PMID: 31101098 PMCID: PMC6524310 DOI: 10.1186/s12887-019-1527-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 05/03/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Neurally adjusted ventilatory assist (NAVA) is an alternative to pressure support ventilation (PSV) potentially improving patient-ventilator interaction. During NAVA, diaphragmatic electrical activity (EAdi) is used to trigger the ventilator and perform a proportional respiratory assistance. We present a case in which the presence of severe bilateral diaphragmatic dysfunction led to a failure of NAVA. On the contrary, the preserved activity of the accessory inspiratory muscles allowed a successful respiratory assistance using PSV. CASE PRESENTATION A 10-year-old girl developed quadriplegia after neurological surgery. Initially, no spontaneous breathing activity was present and volume controlled ventilation was necessary. Two months later spontaneous inspiratory efforts were observed and a maximal negative inspiratory force of - 20 cmH2O was recorded. In addition, a NAVA nasogastric tube was placed. The recorded EAdi signal, despite showing a phasic activity, had a very low amplitude (1-2 μV). Two brief (15 min) breathing trials to compare PSV (pressure support = 8 cmH2O) with NAVA (Gain = 5 cmH2O/μV, inspiratory trigger = 0.3 μV) were performed. On PSV, the patient was well adapted with stable tidal volumes, respiratory rates, minute ventilation, end-tidal and venous carbon dioxide levels. When switched to NAVA, her breathing pattern became irregular and she showed clear sign of increased work of breathing and distress: tidal volume dropped and respiratory rate rose, leading to an increase in total minute ventilation. Nevertheless, end-tidal and venous carbon dioxide rapidly increased (from 49 to 55 mmHg and from 52 to 57 mmHg, respectively). An electromyographic study documented an impairment of the diaphragm with preserved activity of the accessory inspiratory muscles. CONCLUSIONS We document the failure of mechanical assistance performed with NAVA due to bilateral diaphragmatic dysfunction in a critically ill child. The preserved activity of some accessory respiratory muscles allowed to support the patient effectively with pressure support ventilation, i.e. by applying a pneumatic trigger. The present case underlines (i) the importance of the integrity of the respiratory centers, phrenic nerves and diaphragm in order to perform NAVA and (ii) the possible diagnostic role of EAdi monitoring in complex cases of weaning failure.
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Affiliation(s)
- Thomas Langer
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy. .,Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Anestesia e Terapia Intensiva Donna-Bambino, Milan, Italy.
| | - Serena Baio
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Giovanna Chidini
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Anestesia e Terapia Intensiva Donna-Bambino, Milan, Italy
| | - Tiziana Marchesi
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Anestesia e Terapia Intensiva Donna-Bambino, Milan, Italy
| | - Giacomo Grasselli
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy.,Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Antonio Pesenti
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy.,Department of Anesthesia, Critical Care and Emergency, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Edoardo Calderini
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Anestesia e Terapia Intensiva Donna-Bambino, Milan, Italy
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38
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Heunks L, Ottenheijm C. Diaphragm-Protective Mechanical Ventilation to Improve Outcomes in ICU Patients? Am J Respir Crit Care Med 2019; 197:150-152. [PMID: 29182892 DOI: 10.1164/rccm.201710-2002ed] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Leo Heunks
- 1 Department of Intensive Care VU University Medical Centre Amsterdam Amsterdam, the Netherlands
| | - Coen Ottenheijm
- 2 Department of Physiology VU University Medical Centre Amsterdam Amsterdam, the Netherlands and.,3 Department of Cellular and Molecular Medicine University of Arizona Tucson, Arizona
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39
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Goligher EC. Myotrauma in mechanically ventilated patients. Intensive Care Med 2019; 45:881-884. [PMID: 30741329 DOI: 10.1007/s00134-019-05557-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 02/02/2019] [Indexed: 10/27/2022]
Affiliation(s)
- Ewan C Goligher
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada. .,Department of Medicine, Division of Respirology, University Health Network, Toronto, Canada. .,Toronto General Hospital Research Institute, 585 University Ave., 11-PMB Room 192, Toronto, ON, M5G 2N2, Canada.
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40
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Acetylcholine receptor antagonists in acute respiratory distress syndrome: much more than muscle relaxants. Crit Care 2018; 22:132. [PMID: 29788993 PMCID: PMC5964732 DOI: 10.1186/s13054-018-1979-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 02/07/2018] [Indexed: 11/17/2022] Open
Abstract
Acetylcholine receptor antagonists have been shown to improve outcome in patients with severe acute respiratory distress syndrome. However, it is incompletely understood how these agents improve outcome. In the current editorial, we discuss the mechanisms of action of acetylcholine receptor antagonists beyond neuromuscular blockade.
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41
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Schreiber A, Bertoni M, Goligher EC. Avoiding Respiratory and Peripheral Muscle Injury During Mechanical Ventilation: Diaphragm-Protective Ventilation and Early Mobilization. Crit Care Clin 2018; 34:357-381. [PMID: 29907270 DOI: 10.1016/j.ccc.2018.03.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Both limb muscle weakness and respiratory muscle weakness are exceedingly common in critically ill patients. Respiratory muscle weakness prolongs ventilator dependence, predisposing to nosocomial complications and death. Limb muscle weakness persists for months after discharge from intensive care and results in poor long-term functional status and quality of life. Major mechanisms of muscle injury include critical illness polymyoneuropathy, sepsis, pharmacologic exposures, metabolic derangements, and excessive muscle loading and unloading. The diaphragm may become weak because of excessive unloading (leading to atrophy) or because of excessive loading (either concentric or eccentric) owing to insufficient ventilator assistance.
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Affiliation(s)
- Annia Schreiber
- Respiratory Intensive Care Unit and Pulmonary Rehabilitation Unit, Istituti Clinici Scientifici Maugeri, Scientific Institute of Pavia, Via Salvatore Maugeri 10, Pavia 27100, Italy
| | - Michele Bertoni
- Department of Anesthesia, Critical Care and Emergency, Spedali Civili University Hospital, Piazzale Spedali Civili 1, Brescia 25123, Italy
| | - Ewan C Goligher
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada; Division of Respirology, Department of Medicine, University Health Network, Toronto General Hospital, 585 University Avenue, Peter Munk Building, 11th Floor Room 192, Toronto, ON M5G 2N2, Canada.
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Weaning from Mechanical Ventilation in ARDS: Aspects to Think about for Better Understanding, Evaluation, and Management. BIOMED RESEARCH INTERNATIONAL 2018; 2018:5423639. [PMID: 30402484 PMCID: PMC6198583 DOI: 10.1155/2018/5423639] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 08/22/2018] [Accepted: 08/26/2018] [Indexed: 12/14/2022]
Abstract
Acute respiratory distress syndrome (ARDS) is characterized by severe inflammatory response and hypoxemia. The use of mechanical ventilation (MV) for correction of gas exchange can cause worsening of this inflammatory response, called “ventilator-induced lung injury” (VILI). The process of withdrawing mechanical ventilation, referred to as weaning from MV, may cause worsening of lung injury by spontaneous ventilation. Currently, there are few specific studies in patients with ARDS. Herein, we reviewed the main aspects of spontaneous ventilation and also discussed potential methods to predict the failure of weaning in this patient category. We also reviewed new treatments (modes of mechanical ventilation, neuromuscular blocker use, and extracorporeal membrane oxygenation) that could be considered in weaning ARDS patients from MV.
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de Vries H, Jonkman A, Shi ZH, Spoelstra-de Man A, Heunks L. Assessing breathing effort in mechanical ventilation: physiology and clinical implications. ANNALS OF TRANSLATIONAL MEDICINE 2018; 6:387. [PMID: 30460261 DOI: 10.21037/atm.2018.05.53] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Recent studies have shown both beneficial and detrimental effects of patient breathing effort in mechanical ventilation. Quantification of breathing effort may allow the clinician to titrate ventilator support to physiological levels of respiratory muscle activity. In this review we will describe the physiological background and methodological issues of the most frequently used methods to quantify breathing effort, including esophageal pressure measurement, the work of breathing, the pressure-time-product, electromyography and ultrasound. We will also discuss the level of breathing effort that may be considered optimal during mechanical ventilation at different stages of critical illness.
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Affiliation(s)
- Heder de Vries
- Department of Intensive Care Medicine, Amsterdam Cardiovascular Sciences, VU University Medical Centre, Amsterdam, The Netherlands
| | - Annemijn Jonkman
- Department of Intensive Care Medicine, Amsterdam Cardiovascular Sciences, VU University Medical Centre, Amsterdam, The Netherlands
| | - Zhong-Hua Shi
- Department of Intensive Care Medicine, Amsterdam Cardiovascular Sciences, VU University Medical Centre, Amsterdam, The Netherlands.,Department of Critical Care Medicine, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China
| | - Angélique Spoelstra-de Man
- Department of Intensive Care Medicine, Amsterdam Cardiovascular Sciences, VU University Medical Centre, Amsterdam, The Netherlands
| | - Leo Heunks
- Department of Intensive Care Medicine, Amsterdam Cardiovascular Sciences, VU University Medical Centre, Amsterdam, The Netherlands
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44
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Somhorst P, Groot MW, Gommers D. Partial neuromuscular blockage to promote weaning from mechanical ventilation in severe ARDS: A case report. Respir Med Case Rep 2018; 25:225-227. [PMID: 30245971 PMCID: PMC6148465 DOI: 10.1016/j.rmcr.2018.09.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 09/11/2018] [Accepted: 09/11/2018] [Indexed: 11/17/2022] Open
Abstract
Spontaneous breathing efforts during mechanical ventilation can lead to patient self-inflicted lung injury (P-SILI). In order to prevent P-SILI, patients are generally heavily sedated and receive muscle relaxation, resulting in a slower weaning process. We present a case in which we applied partial neuromuscular blockage in order to prevent P-SILI while allowing spontaneous breathing but with limited efforts during assist mechanical ventilation.
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Affiliation(s)
- Peter Somhorst
- Department of Intensive Care, Erasmus MC - University Medical Center, Dr. Molewaterplein 40, 3015 GD, Rotterdam, The Netherlands
| | - Mart W Groot
- Department of Intensive Care, Erasmus MC - University Medical Center, Dr. Molewaterplein 40, 3015 GD, Rotterdam, The Netherlands
| | - Diederik Gommers
- Department of Intensive Care, Erasmus MC - University Medical Center, Dr. Molewaterplein 40, 3015 GD, Rotterdam, The Netherlands
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45
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Respiratory Muscle Effort during Expiration in Successful and Failed Weaning from Mechanical Ventilation. Anesthesiology 2018; 129:490-501. [DOI: 10.1097/aln.0000000000002256] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Abstract
What We Already Know about This Topic
What This Article Tells Us That Is New
Background
Respiratory muscle weakness in critically ill patients is associated with difficulty in weaning from mechanical ventilation. Previous studies have mainly focused on inspiratory muscle activity during weaning; expiratory muscle activity is less well understood. The current study describes expiratory muscle activity during weaning, including tonic diaphragm activity. The authors hypothesized that expiratory muscle effort is greater in patients who fail to wean compared to those who wean successfully.
Methods
Twenty adult patients receiving mechanical ventilation (more than 72 h) performed a spontaneous breathing trial. Tidal volume, transdiaphragmatic pressure, diaphragm electrical activity, and diaphragm neuromechanical efficiency were calculated on a breath-by-breath basis. Inspiratory (and expiratory) muscle efforts were calculated as the inspiratory esophageal (and expiratory gastric) pressure–time products, respectively.
Results
Nine patients failed weaning. The contribution of the expiratory muscles to total respiratory muscle effort increased in the “failure” group from 13 ± 9% at onset to 24 ± 10% at the end of the breathing trial (P = 0.047); there was no increase in the “success” group. Diaphragm electrical activity (expressed as the percentage of inspiratory peak) was low at end expiration (failure, 3 ± 2%; success, 4 ± 6%) and equal between groups during the entire expiratory phase (P = 0.407). Diaphragm neuromechanical efficiency was lower in the failure versus success groups (0.38 ± 0.16 vs. 0.71 ± 0.36 cm H2O/μV; P = 0.054).
Conclusions
Weaning failure (vs. success) is associated with increased effort of the expiratory muscles and impaired neuromechanical efficiency of the diaphragm but no difference in tonic activity of the diaphragm.
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Sottile PD, Albers D, Moss MM. Neuromuscular blockade is associated with the attenuation of biomarkers of epithelial and endothelial injury in patients with moderate-to-severe acute respiratory distress syndrome. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2018. [PMID: 29523157 PMCID: PMC5845220 DOI: 10.1186/s13054-018-1974-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Background Neuromuscular blockade (NMB) is a therapy for acute respiratory distress syndrome (ARDS). However, the mechanism by which NMB may improve outcome for ARDS patients remains unclear. We sought to determine whether NMB attenuates biomarkers of epithelial and endothelial lung injury and systemic inflammation in ARDS patients, and whether the association is dependent on tidal volume size and the initial degree of hypoxemia. Methods We performed a secondary analysis of patients enrolled in the ARDS network low tidal volume ventilation (ARMA) study. Our primary predictor variable was the number of days receiving NMB between study enrollment and day 3. Our primary outcome variables were the change in concentration of biomarkers of epithelial injury (serum surfactant protein-D (SP-D)), endothelial injury (von Willebrand factor (VWF)), and systemic inflammation (interleukin (IL)-8). Multivariable regression analysis was used to compare the change in biomarker concentration controlling for multiple covariates. Patients were stratified by treatment arm (12 versus 6 cm3/kg) and by an initial arterial oxygen tension (PaO2) to fractional inspired oxygen (FiO2) (P/F) ratio of 120. Results A total of 446 (49%) patients had complete SP-D, VWF, and IL-8 measurements on study enrollment and day 3. After adjusting for baseline differences, each day of NMB was associated with a decrease in SP-D (−23.7 ng/ml/day, p = 0.029), VWF (−33.5% of control/day, p = 0.015), and IL-8 (−362.6 pg/ml/day, p = 0.030) in patients with an initial P/F less than or equal to 120 and receiving low tidal volume ventilation. However, patients with a P/F ratio of greater than 120 or receiving high tidal volume ventilation had either no change or an increase in SP-D, WVF, or IL-8 concentrations. Conclusion NBM is associated with decreased biomarkers of epithelial and endothelial lung injury and systemic inflammation in ARDS patients receiving low tidal volume ventilation and those with a P/F ratio less than or equal to 120. Electronic supplementary material The online version of this article (10.1186/s13054-018-1974-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Peter D Sottile
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado School of Medicine, Anschutz Medical Campus, 12700 E. 19th Ave., RC2 9th Floor, C272, Aurora, CO, 80045, USA.
| | - David Albers
- Department of Biomedical Informatics, Columbia University Medical Center, 622 W. 168th Street, Presbyterian Building 20th Floor, New York, NY, 10032, USA
| | - Marc M Moss
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado School of Medicine, Anschutz Medical Campus, 12700 E. 19th Ave., RC2 9th Floor, C272, Aurora, CO, 80045, USA
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Oppersma E, Doorduin J, van der Hoeven JG, Veltink PH, van Hees HWH, Heunks LMA. The effect of metabolic alkalosis on the ventilatory response in healthy subjects. Respir Physiol Neurobiol 2018; 249:47-53. [PMID: 29307724 DOI: 10.1016/j.resp.2018.01.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 12/07/2017] [Accepted: 01/03/2018] [Indexed: 11/29/2022]
Abstract
BACKGROUND Patients with acute respiratory failure may develop respiratory acidosis. Metabolic compensation by bicarbonate production or retention results in posthypercapnic alkalosis with an increased arterial bicarbonate concentration. The hypothesis of this study was that elevated plasma bicarbonate levels decrease respiratory drive and minute ventilation. METHODS In an intervention study in 10 healthy subjects the ventilatory response using a hypercapnic ventilatory response (HCVR) test was assessed, before and after administration of high dose sodium bicarbonate. Total dose of sodiumbicarbonate was 1000 ml 8.4% in 3 days. RESULTS Plasma bicarbonate increased from 25.2 ± 2.2 to 29.2 ± 1.9 mmol/L. With increasing inspiratory CO2 pressure during the HCVR test, RR, Vt, Pdi, EAdi and VE increased. The clinical ratio ΔVE/ΔPetCO2 remained unchanged, but Pdi, EAdi and VE were significantly lower after bicarbonate administration for similar levels of inspired CO2. CONCLUSION This study demonstrates that in healthy subjects metabolic alkalosis decreases the neural respiratory drive and minute ventilation, as a response to inspiratory CO2.
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Affiliation(s)
- E Oppersma
- MIRA - Institute for Biomedical Technology & Technical Medicine, University of Twente, Enschede, The Netherlands; Department of Critical Care Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - J Doorduin
- Department of Critical Care Medicine, Radboud University Medical Center, Nijmegen, The Netherlands; Department of Neurology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - J G van der Hoeven
- Department of Critical Care Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - P H Veltink
- MIRA - Institute for Biomedical Technology & Technical Medicine, University of Twente, Enschede, The Netherlands
| | - H W H van Hees
- Department of Pulmonary Diseases, Radboud University Medical Center, Nijmegen, The Netherlands
| | - L M A Heunks
- Department of Critical Care Medicine, Radboud University Medical Center, Nijmegen, The Netherlands; Department of Intensive Care Medicine, VU University Medical Center, Amsterdam, The Netherlands.
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Acceleration sensors in abdominal wall position as a non-invasive approach to detect early breathing alterations induced by intolerance of increased airway resistance. J Cardiothorac Surg 2017; 12:96. [PMID: 29126451 PMCID: PMC5681836 DOI: 10.1186/s13019-017-0658-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 11/01/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Early detection of respiratory overload is crucial to mechanically ventilated patients, especially during phases of spontaneous breathing. Although a diversity of methods and indices has been established, there is no highly specific approach to predict respiratory failure. This study aimed to evaluate acceleration sensors in abdominal and thoracic wall positions to detect alterations in breathing excursions in a setting of gradual increasing airway resistance. METHODS Twenty-nine healthy volunteers were committed to a standardized protocol of a two-minutes step-down spontaneous breathing on a 5 mm, 4 mm and then 3 mm orally placed endotracheal tube. Accelerator sensors in thoracic and abdominal wall position monitored breathing excursions. 15 participants passed the breathing protocol ("completed" group), 14 individuals cancelled the protocol due to subjective intolerance to the increasing airway resistance ("abandoned" group). RESULTS Gradual increased respiratory workload led to a significant decrease of acceleration in abdominal wall position in the "abandoned" group compared to the "completed" group (p < 0.001), while these gradual accelerating changes were not observed in thoracic wall position (p = 0.484). Thoracic acceleration sensors did not detect any time- and group-specific changes (p = 0.746). CONCLUSIONS The abdominal wall position of the acceleration sensors may be a non-invasive, economical and practical approach to detect early breathing alterations prior to respiratory failure. TRIAL REGISTRATION EK 309-15; by the Ethics Committee of the Faculty of Medicine, RWTH Aachen, Aachen, Germany. Retrospectively registered 28th of December 2015.
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Effect of inspiratory synchronization during pressure-controlled ventilation on lung distension and inspiratory effort. Ann Intensive Care 2017; 7:100. [PMID: 28986852 PMCID: PMC5630544 DOI: 10.1186/s13613-017-0324-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Accepted: 09/19/2017] [Indexed: 12/22/2022] Open
Abstract
Background In pressure-controlled (PC) ventilation, tidal volume (VT) and transpulmonary pressure (PL) result from the addition of ventilator pressure and the patient’s inspiratory effort. PC modes can be classified into fully, partially, and non-synchronized modes, and the degree of synchronization may result in different VT and PL despite identical ventilator settings. This study assessed the effects of three PC modes on VT, PL, inspiratory effort (esophageal pressure–time product, PTPes), and airway occlusion pressure, P0.1. We also assessed whether P0.1 can be used for evaluating patient effort. Methods Prospective, randomized, crossover physiologic study performed in 14 spontaneously breathing mechanically ventilated patients recovering from acute respiratory failure (1 subsequently withdrew). PC modes were fully (PC-CMV), partially (PC-SIMV), and non-synchronized (PC-IMV using airway pressure release ventilation) and were applied randomly; driving pressure, inspiratory time, and set respiratory rate being similar for all modes. Airway, esophageal pressure, P0.1, airflow, gas exchange, and hemodynamics were recorded. Results VT was significantly lower during PC-IMV as compared with PC-SIMV and PC-CMV (387 ± 105 vs 458 ± 134 vs 482 ± 108 mL, respectively; p < 0.05). Maximal PL was also significantly lower (13.3 ± 4.9 vs 15.3 ± 5.7 vs 15.5 ± 5.2 cmH2O, respectively; p < 0.05), but PTPes was significantly higher in PC-IMV (215.6 ± 154.3 vs 150.0 ± 102.4 vs 130.9 ± 101.8 cmH2O × s × min−1, respectively; p < 0.05), with no differences in gas exchange and hemodynamic variables. PTPes increased by more than 15% in 10 patients and by more than 50% in 5 patients. An increased P0.1 could identify high levels of PTPes. Conclusions Non-synchronized PC mode lowers VT and PL in comparison with more synchronized modes in spontaneously breathing patients but can increase patient effort and may need specific adjustments. Clinical Trial Registration Clinicaltrial.gov # NCT02071277 Electronic supplementary material The online version of this article (doi:10.1186/s13613-017-0324-z) contains supplementary material, which is available to authorized users.
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50
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Critical illness-associated diaphragm weakness. Intensive Care Med 2017; 43:1441-1452. [DOI: 10.1007/s00134-017-4928-4] [Citation(s) in RCA: 152] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 08/31/2017] [Indexed: 11/26/2022]
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