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Li P, Gao S, Wang Y, Zhou R, Chen G, Li W, Hao X, Zhu T. Utilising intraoperative respiratory dynamic features for developing and validating an explainable machine learning model for postoperative pulmonary complications. Br J Anaesth 2024; 132:1315-1326. [PMID: 38637267 DOI: 10.1016/j.bja.2024.02.025] [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: 09/05/2023] [Revised: 02/20/2024] [Accepted: 02/23/2024] [Indexed: 04/20/2024] Open
Abstract
BACKGROUND Timely detection of modifiable risk factors for postoperative pulmonary complications (PPCs) could inform ventilation strategies that attenuate lung injury. We sought to develop, validate, and internally test machine learning models that use intraoperative respiratory features to predict PPCs. METHODS We analysed perioperative data from a cohort comprising patients aged 65 yr and older at an academic medical centre from 2019 to 2023. Two linear and four nonlinear learning models were developed and compared with the current gold-standard risk assessment tool ARISCAT (Assess Respiratory Risk in Surgical Patients in Catalonia Tool). The Shapley additive explanation of artificial intelligence was utilised to interpret feature importance and interactions. RESULTS Perioperative data were obtained from 10 284 patients who underwent 10 484 operations (mean age [range] 71 [65-98] yr; 42% female). An optimised XGBoost model that used preoperative variables and intraoperative respiratory variables had area under the receiver operating characteristic curves (AUROCs) of 0.878 (0.866-0.891) and 0.881 (0.879-0.883) in the validation and prospective cohorts, respectively. These models outperformed ARISCAT (AUROC: 0.496-0.533). The intraoperative dynamic features of respiratory dynamic system compliance, mechanical power, and driving pressure were identified as key modifiable contributors to PPCs. A simplified model based on XGBoost including 20 variables generated an AUROC of 0.864 (0.852-0.875) in an internal testing cohort. This has been developed into a web-based tool for further external validation (https://aorm.wchscu.cn/). CONCLUSIONS These findings suggest that real-time identification of surgical patients' risk of postoperative pulmonary complications could help personalise intraoperative ventilatory strategies and reduce postoperative pulmonary complications.
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Affiliation(s)
- Peiyi Li
- Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China; Laboratory of Anesthesia and Critical Care Medicine, National-Local Joint Engineering Research Centre of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China; The Research Units of West China (2018RU012)-Chinese Academy of Medical Sciences, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Shuanliang Gao
- College of Software Engineering, Chengdu University of Information Technology, Chengdu, Sichuan, China
| | - Yaqiang Wang
- College of Software Engineering, Chengdu University of Information Technology, Chengdu, Sichuan, China; Sichuan Key Laboratory of Software Automatic Generation and Intelligent Service, Chengdu, Sichuan, China
| | - RuiHao Zhou
- Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China; Laboratory of Anesthesia and Critical Care Medicine, National-Local Joint Engineering Research Centre of Translational Medicine of Anesthesiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China; The Research Units of West China (2018RU012)-Chinese Academy of Medical Sciences, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Guo Chen
- Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China; The Research Units of West China (2018RU012)-Chinese Academy of Medical Sciences, West China Hospital, Sichuan University, Chengdu, Sichuan, China
| | - Weimin Li
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan, China; Institute of Respiratory Health, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu, Sichuan, China; State Key Laboratory of Respiratory Health and Multimorbidity, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
| | - Xuechao Hao
- Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China; The Research Units of West China (2018RU012)-Chinese Academy of Medical Sciences, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
| | - Tao Zhu
- Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China; The Research Units of West China (2018RU012)-Chinese Academy of Medical Sciences, West China Hospital, Sichuan University, Chengdu, Sichuan, China.
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Grieco DL, Pintaudi G, Bongiovanni F, Anzellotti GM, Menga LS, Cesarano M, Dell’Anna AM, Rosá T, Delle Cese L, Bello G, Giammatteo V, Gennenzi V, Tanzarella ES, Cutuli SL, De Pascale G, De Gaetano A, Maggiore SM, Antonelli M. Recruitment-to-inflation Ratio Assessed through Sequential End-expiratory Lung Volume Measurement in Acute Respiratory Distress Syndrome. Anesthesiology 2023; 139:801-814. [PMID: 37523486 PMCID: PMC10723770 DOI: 10.1097/aln.0000000000004716] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 04/15/2022] [Accepted: 07/25/2023] [Indexed: 08/02/2023]
Abstract
BACKGROUND Positive end-expiratory pressure (PEEP) benefits in acute respiratory distress syndrome are driven by lung dynamic strain reduction. This depends on the variable extent of alveolar recruitment. The recruitment-to-inflation ratio estimates recruitability across a 10-cm H2O PEEP range through a simplified maneuver. Whether recruitability is uniform or not across this range is unknown. The hypotheses of this study are that the recruitment-to-inflation ratio represents an accurate estimate of PEEP-induced changes in dynamic strain, but may show nonuniform behavior across the conventionally tested PEEP range (15 to 5 cm H2O). METHODS Twenty patients with moderate-to-severe COVID-19 acute respiratory distress syndrome underwent a decremental PEEP trial (PEEP 15 to 13 to 10 to 8 to 5 cm H2O). Respiratory mechanics and end-expiratory lung volume by nitrogen dilution were measured the end of each step. Gas exchange, recruited volume, recruitment-to-inflation ratio, and changes in dynamic, static, and total strain were computed between 15 and 5 cm H2O (global recruitment-to-inflation ratio) and within narrower PEEP ranges (granular recruitment-to-inflation ratio). RESULTS Between 15 and 5 cm H2O, median [interquartile range] global recruitment-to-inflation ratio was 1.27 [0.40 to 1.69] and displayed a linear correlation with PEEP-induced dynamic strain reduction (r = -0.94; P < 0.001). Intraindividual recruitment-to-inflation ratio variability within the narrower ranges was high (85% [70 to 109]). The relationship between granular recruitment-to-inflation ratio and PEEP was mathematically described by a nonlinear, quadratic equation (R2 = 0.96). Granular recruitment-to-inflation ratio across the narrower PEEP ranges itself had a linear correlation with PEEP-induced reduction in dynamic strain (r = -0.89; P < 0.001). CONCLUSIONS Both global and granular recruitment-to-inflation ratio accurately estimate PEEP-induced changes in lung dynamic strain. However, the effect of 10 cm H2O of PEEP on lung strain may be nonuniform. Granular recruitment-to-inflation ratio assessment within narrower PEEP ranges guided by end-expiratory lung volume measurement may aid more precise PEEP selection, especially when the recruitment-to-inflation ratio obtained with the simplified maneuver between PEEP 15 and 5 cm H2O yields intermediate values that are difficult to interpret for a proper choice between a high and low PEEP strategy. EDITOR’S PERSPECTIVE
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Affiliation(s)
- Domenico Luca Grieco
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy; Anesthesia, Emergency and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Gabriele Pintaudi
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy; Anesthesia, Emergency and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Filippo Bongiovanni
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy; Anesthesia, Emergency and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Gian Marco Anzellotti
- Department of Medical, Oral and Biotechnological Sciences, School of Medicine and Health Sciences, Section of Anesthesia, Analgesia, Perioperative and Intensive Care, SS, Annunziata Hospital, Gabriele d’Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Luca Salvatore Menga
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy; Anesthesia, Emergency and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Melania Cesarano
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy; Anesthesia, Emergency and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Antonio M. Dell’Anna
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy; Anesthesia, Emergency and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Tommaso Rosá
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy; Anesthesia, Emergency and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Luca Delle Cese
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy; Anesthesia, Emergency and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Giuseppe Bello
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy; Anesthesia, Emergency and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Valentina Giammatteo
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy; Anesthesia, Emergency and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Veronica Gennenzi
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy; Anesthesia, Emergency and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Eloisa S. Tanzarella
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy; Anesthesia, Emergency and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Salvatore L. Cutuli
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy; Anesthesia, Emergency and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Gennaro De Pascale
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy; Anesthesia, Emergency and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Andrea De Gaetano
- Consiglio Nazionale delle Ricerche, IRIB Istituto per la Ricerca e l’Innovazione Biomedica, Palermo, Italy; IASI Istituto per l’Analisi dei Sistemi ed Informatica, Rome, Italy; Department of Biomatics, Óbuda University, Budapest, Hungary
| | - Salvatore M. Maggiore
- Department of Medical, Oral and Biotechnological Sciences, School of Medicine and Health Sciences, Section of Anesthesia, Analgesia, Perioperative and Intensive Care, SS, Annunziata Hospital, Gabriele d’Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Massimo Antonelli
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy; Anesthesia, Emergency and Intensive Care Medicine, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
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Khaled L, Godet T, Jaber S, Chanques G, Asehnoune K, Bourdier J, Araujo L, Futier E, Pereira B. Intraoperative protective mechanical ventilation in patients requiring emergency abdominal surgery: the multicentre prospective randomised IMPROVE-2 study protocol. BMJ Open 2022; 12:e054823. [PMID: 35523498 PMCID: PMC9083403 DOI: 10.1136/bmjopen-2021-054823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
UNLABELLED IntroductionEmergency abdominal surgery is associated with a high risk of postoperative complications. One of the most serious is postoperative respiratory failure (PRF), with reported rates up to 20%-30% and attributable 30-day mortality that can exceed 20%.Lung-protective ventilation, especially the use of low tidal volume, may help reducing the risk of lung injury. The role of positive end-expiratory pressure (PEEP) and recruitment manoeuvre (RM) remains however debated. We aim to evaluate whether a strategy aimed at increasing alveolar recruitment by using higher PEEP levels and RM could be more effective at reducing PRF and mortality after emergency abdominal surgery than a strategy aimed at minimising alveolar distension by using lower PEEP levels without RM. METHODS AND ANALYSIS The IMPROVE-2 study is a multicentre randomised, parallel-group clinical trial of 680 patients requiring emergency abdominal surgery under general anaesthesia. Patients will be randomly allocated in a 1:1 ratio to receive either low PEEP levels (≤5 cm H2O) without RM or high PEEP levels individually adjusted according to driving pressure in addition to RM, stratified by centre and according to the presence of shock and hypoxaemia at randomisation. The primary endpoint is a composite of PRF and all-cause mortality by day 30 or hospital discharge. Data will be analysed on the intention-to-treat principle and a per-protocol basis. ETHICS AND DISSEMINATION IMPROVE-2 trial has been approved by an independent ethics committee for all study centres. Participant recruitment began in February 2021. Results will be submitted for publication in international peer-reviewed journals. TRIAL REGISTRATION NUMBER NCT03987789.
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Affiliation(s)
- Louisa Khaled
- Departement Anesthésie Réanimation, Centre Hospitalier Universitaire (CHU) Clermont-Ferrand, Clermont-Ferrand, France
| | - Thomas Godet
- Departement Anesthésie Réanimation, Centre Hospitalier Universitaire (CHU) Clermont-Ferrand, Clermont-Ferrand, France
| | - Samir Jaber
- Département Anesthésie Réanimation B (DAR B), Centre Hospitalier Universitaire (CHU) Montpellier, Montpellier, France
| | - Gerald Chanques
- Département Anesthésie Réanimation B (DAR B), Centre Hospitalier Universitaire (CHU) Montpellier, Montpellier, France
| | - Karim Asehnoune
- Département Anesthésie Réanimation, Centre Hospitalier Universitaire (CHU) Nantes, Nantes, France
| | - Justine Bourdier
- Direction de la Recherche Clinique & Innovation (DRCI), CHU Clermont-Ferrand, Clermont-Ferrand, France
| | - Lynda Araujo
- Direction de la Recherche Clinique & Innovation (DRCI), CHU Clermont-Ferrand, Clermont-Ferrand, France
| | - Emmanuel Futier
- Departement Anesthésie Réanimation, Centre Hospitalier Universitaire (CHU) Clermont-Ferrand, Clermont-Ferrand, France
- Inserm U-1103, Université Clermont Auvergne (UCA), Clermont-Ferrand, France
| | - Bruno Pereira
- Direction de la Recherche Clinique & Innovation (DRCI), CHU Clermont-Ferrand, Clermont-Ferrand, France
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Abstract
The Enhanced Recovery After Surgery Society published guidelines for bariatric surgery reviewing the evidence and providing specific care recommendations. These guidelines emphasize preoperative nutrition, multimodal analgesia, postoperative nausea and vomiting prophylaxis, anesthetic technique, nutrition, and mobilization. Several studies have since evaluated these pathways, showing them to be safe and effective at decreasing hospital length of stay and postoperative nausea and vomiting. This article emphasizes anesthetic management in the perioperative period and outlines future directions, including the application of Enhanced Recovery After Surgery principles in patients with extreme obesity, diabetes, and metabolic disease and standardization of the pathways to decrease heterogeneity.
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Affiliation(s)
- Christa L Riley
- Fellow, Surgical Critical Care, Department of Anesthesiology and Critical Care, Penn Medicine, 6 Dulles, 3400 Spruce Street, Philadelphia, PA 19104, USA; Anesthesiologist & Intensivist, Department of Anesthesiology, Hunter Holmes McGuire VA Medical Center, Richmond, VA, USA.
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Mechanical Power: A New Concept in Mechanical Ventilation. Am J Med Sci 2021; 362:537-545. [PMID: 34597688 DOI: 10.1016/j.amjms.2021.09.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 07/26/2021] [Accepted: 09/24/2021] [Indexed: 11/22/2022]
Abstract
Mechanical ventilation is a potentially life-saving therapy for patients with acute lung injury, but the ventilator itself may cause lung injury. Ventilator-induced lung injury (VILI) is sometimes an unfortunate consequence of mechanical ventilation. It is not clear however how best to minimize VILI through adjustment of various parameters including tidal volume, plateau pressure, driving pressure, and positive end expiratory pressure (PEEP). No single parameter provides a clear indication for onset of lung injury attributable exclusively to the ventilator. There is currently interest in quantifying how static and dynamic parameters contribute to VILI. One concept that has emerged is the consideration of the amount of energy transferred from the ventilator to the respiratory system per unit time, which can be quantified as mechanical power. This review article reports on recent literature in this emerging field and future roles for mechanical power assessments in prospective studies.
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Fogagnolo A, Montanaro F, Al-Husinat L, Turrini C, Rauseo M, Mirabella L, Ragazzi R, Ottaviani I, Cinnella G, Volta CA, Spadaro S. Management of Intraoperative Mechanical Ventilation to Prevent Postoperative Complications after General Anesthesia: A Narrative Review. J Clin Med 2021; 10:jcm10122656. [PMID: 34208699 PMCID: PMC8234365 DOI: 10.3390/jcm10122656] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 06/09/2021] [Accepted: 06/15/2021] [Indexed: 01/02/2023] Open
Abstract
Mechanical ventilation (MV) is still necessary in many surgical procedures; nonetheless, intraoperative MV is not free from harmful effects. Protective ventilation strategies, which include the combination of low tidal volume and adequate positive end expiratory pressure (PEEP) levels, are usually adopted to minimize the ventilation-induced lung injury and to avoid post-operative pulmonary complications (PPCs). Even so, volutrauma and atelectrauma may co-exist at different levels of tidal volume and PEEP, and therefore, the physiological response to the MV settings should be monitored in each patient. A personalized perioperative approach is gaining relevance in the field of intraoperative MV; in particular, many efforts have been made to individualize PEEP, giving more emphasis on physiological and functional status to the whole body. In this review, we summarized the latest findings about the optimization of PEEP and intraoperative MV in different surgical settings. Starting from a physiological point of view, we described how to approach the individualized MV and monitor the effects of MV on lung function.
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Affiliation(s)
- Alberto Fogagnolo
- Department of Translation Medicine and for Romagna, Section of Anesthesia and Intensive Care, University of Ferrara, 44121 Ferrara, Italy; (F.M.); (C.T.); (R.R.); (I.O.); (C.A.V.); (S.S.)
- Correspondence:
| | - Federica Montanaro
- Department of Translation Medicine and for Romagna, Section of Anesthesia and Intensive Care, University of Ferrara, 44121 Ferrara, Italy; (F.M.); (C.T.); (R.R.); (I.O.); (C.A.V.); (S.S.)
| | - Lou’i Al-Husinat
- Department of Clinical Sciences, Faculty of Medicine, Yarmouk University, Irbid 21163, Jordan;
| | - Cecilia Turrini
- Department of Translation Medicine and for Romagna, Section of Anesthesia and Intensive Care, University of Ferrara, 44121 Ferrara, Italy; (F.M.); (C.T.); (R.R.); (I.O.); (C.A.V.); (S.S.)
| | - Michela Rauseo
- Department of Anesthesia and Intensive Care, University of Foggia, 71122 Foggia, Italy; (M.R.); (L.M.); (G.C.)
| | - Lucia Mirabella
- Department of Anesthesia and Intensive Care, University of Foggia, 71122 Foggia, Italy; (M.R.); (L.M.); (G.C.)
| | - Riccardo Ragazzi
- Department of Translation Medicine and for Romagna, Section of Anesthesia and Intensive Care, University of Ferrara, 44121 Ferrara, Italy; (F.M.); (C.T.); (R.R.); (I.O.); (C.A.V.); (S.S.)
| | - Irene Ottaviani
- Department of Translation Medicine and for Romagna, Section of Anesthesia and Intensive Care, University of Ferrara, 44121 Ferrara, Italy; (F.M.); (C.T.); (R.R.); (I.O.); (C.A.V.); (S.S.)
| | - Gilda Cinnella
- Department of Anesthesia and Intensive Care, University of Foggia, 71122 Foggia, Italy; (M.R.); (L.M.); (G.C.)
| | - Carlo Alberto Volta
- Department of Translation Medicine and for Romagna, Section of Anesthesia and Intensive Care, University of Ferrara, 44121 Ferrara, Italy; (F.M.); (C.T.); (R.R.); (I.O.); (C.A.V.); (S.S.)
| | - Savino Spadaro
- Department of Translation Medicine and for Romagna, Section of Anesthesia and Intensive Care, University of Ferrara, 44121 Ferrara, Italy; (F.M.); (C.T.); (R.R.); (I.O.); (C.A.V.); (S.S.)
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Nguyen TK, Mai DH, Le AN, Nguyen QH, Nguyen CT, Vu TA. A review of intraoperative lung-protective mechanical ventilation strategy. TRENDS IN ANAESTHESIA AND CRITICAL CARE 2021. [DOI: 10.1016/j.tacc.2020.11.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Kneyber MCJ, Ilia S, Koopman AA, van Schelven P, van Dijk J, Burgerhof JGM, Markhorst DG, Blokpoel RGT. Energy transmission in mechanically ventilated children: a translational study. Crit Care 2020; 24:601. [PMID: 33028370 PMCID: PMC7539278 DOI: 10.1186/s13054-020-03313-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 09/28/2020] [Indexed: 11/30/2022] Open
Abstract
Background Recurrent delivery of tidal mechanical energy (ME) inflicts ventilator-induced lung injury (VILI) when stress and strain exceed the limits of tissue tolerance. Mechanical power (MP) is the mathematical description of the ME delivered to the respiratory system over time. It is unknown how ME relates to underlying lung pathology and outcome in mechanically ventilated children. We therefore tested the hypothesis that ME per breath with tidal volume (Vt) normalized to bodyweight correlates with underlying lung pathology and to study the effect of resistance on the ME dissipated to the lung. Methods We analyzed routinely collected demographic, physiological, and laboratory data from deeply sedated and/or paralyzed children < 18 years with and without lung injury. Patients were stratified into respiratory system mechanic subgroups according to the Pediatric Mechanical Ventilation Consensus Conference (PEMVECC) definition. The association between MP, ME, lung pathology, and duration of mechanical ventilation as a primary outcome measure was analyzed adjusting for confounding variables and effect modifiers. The effect of endotracheal tube diameter (ETT) and airway resistance on energy dissipation to the lung was analyzed in a bench model with different lung compliance settings. Results Data of 312 patients with a median age of 7.8 (1.7–44.2) months was analyzed. Age (p < 0.001), RR p < 0.001), and Vt < 0.001) were independently associated with MPrs. ME but not MP correlated significantly (p < 0.001) better with lung pathology. Competing risk regression analysis adjusting for PRISM III 24 h score and PEMVECC stratification showed that ME on day 1 or day 2 of MV but not MP was independently associated with the duration of mechanical ventilation. About 33% of all energy generated by the ventilator was transferred to the lung and highly dependent on lung compliance and airway resistance but not on endotracheal tube size (ETT) during pressure control (PC) ventilation. Conclusions ME better related to underlying lung pathology and patient outcome than MP. The delivery of generated energy to the lung was not dependent on ETT size during PC ventilation. Further studies are needed to identify injurious MErs thresholds in ventilated children.
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Affiliation(s)
- Martin C J Kneyber
- Division of Paediatric Critical Care Medicine, Department of Paediatrics, Beatrix Children's Hospital, University Medical Center Groningen, The University of Groningen, Internal Postal Code CA 80, P.O. Box 30.001, 9700, RB, Groningen, the Netherlands. .,Critical Care, Anesthesia, Peri-operative Medicine & Emergency Medicine (CAPE), The University of Groningen, Groningen, the Netherlands.
| | - Stavroula Ilia
- Division of Paediatric Critical Care Medicine, Department of Paediatrics, Beatrix Children's Hospital, University Medical Center Groningen, The University of Groningen, Internal Postal Code CA 80, P.O. Box 30.001, 9700, RB, Groningen, the Netherlands.,Pediatric Intensive Care Unit, University Hospital Heraklion, University of Crete, Crete, Greece
| | - Alette A Koopman
- Division of Paediatric Critical Care Medicine, Department of Paediatrics, Beatrix Children's Hospital, University Medical Center Groningen, The University of Groningen, Internal Postal Code CA 80, P.O. Box 30.001, 9700, RB, Groningen, the Netherlands
| | - Patrick van Schelven
- Division of Paediatric Critical Care Medicine, Department of Paediatrics, Beatrix Children's Hospital, University Medical Center Groningen, The University of Groningen, Internal Postal Code CA 80, P.O. Box 30.001, 9700, RB, Groningen, the Netherlands
| | - Jefta van Dijk
- Division of Paediatric Critical Care Medicine, Department of Paediatrics, Beatrix Children's Hospital, University Medical Center Groningen, The University of Groningen, Internal Postal Code CA 80, P.O. Box 30.001, 9700, RB, Groningen, the Netherlands
| | - Johannes G M Burgerhof
- Department of Epidemiology, University Medical Center Groningen, The University of Groningen, Groningen, the Netherlands
| | - Dick G Markhorst
- Pediatric Intensive Care Unit, Emma Children's Hospital, Amsterdam UMC, Amsterdam, the Netherlands
| | - Robert G T Blokpoel
- Division of Paediatric Critical Care Medicine, Department of Paediatrics, Beatrix Children's Hospital, University Medical Center Groningen, The University of Groningen, Internal Postal Code CA 80, P.O. Box 30.001, 9700, RB, Groningen, the Netherlands
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Wu HP, Hu HC, Chu CM, Kao KC. The association between higher driving pressure and higher mortality in patients with pneumonia without acute respiratory distress syndrome. J Formos Med Assoc 2020; 120:204-211. [PMID: 32376124 DOI: 10.1016/j.jfma.2020.04.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Revised: 04/18/2020] [Accepted: 04/24/2020] [Indexed: 10/24/2022] Open
Abstract
PURPOSE Recent studies reported that driving pressure has been associated with increased mortality in acute respiratory distress syndrome (ARDS) patients. We aimed to explore the association between 28-day mortality and driving pressure in patients with severe pneumonia without ARDS. METHODS In total, 207 non-ARDS patients with severe pneumonia were enrolled. Serial driving pressures were recorded daily for either 21 days or until ventilator support was no longer required. The relationships between all variables and 28-day mortality were analyzed using binary logistic regression analyses. RESULTS Non-survivors (56 patients) demonstrated high incidences of shock (55.4% vs. 24.5%, p < 0.001), acute renal failure (55.4% vs. 31.1%, p = 0.001), gastrointestinal bleeding (21.4% vs. 9.9%, p = 0.029), thrombocytopenia (53.6% vs. 23.2%, p < 0.001), jaundice (12.5% vs. 1.3%, p = 0.002), and driving pressure on Day 1 (19.9 ± 4.1 vs. 17.4 ± 4.5 cmH2O, p = 0.001). The ratio of arterial partial pressure of oxygen to fraction of inspired oxygen was lower in non-survivors than in survivors (281.5 ± 139.3 vs. 376.2 ± 211.9, p = 0.002). Regression analysis revealed that driving pressure was an independent factor associated with 28-day mortality (odds ratio, 1.110; 95% confidence interval, 1.013-1.217). CONCLUSION Driving pressure was associated with 28-day mortality in patients with severe pneumonia without ARDS.
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Affiliation(s)
- Huang-Pin Wu
- Division of Pulmonary, Critical Care and Sleep Medicine, Chang Gung Memorial Hospital, Keelung, Taiwan; Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Han-Chung Hu
- Chang Gung University College of Medicine, Taoyuan, Taiwan; Department of Thoracic Medicine, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Chien-Ming Chu
- Division of Pulmonary, Critical Care and Sleep Medicine, Chang Gung Memorial Hospital, Keelung, Taiwan; Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Kuo-Chin Kao
- Chang Gung University College of Medicine, Taoyuan, Taiwan; Department of Thoracic Medicine, Chang Gung Memorial Hospital, Linkou, Taiwan.
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Cheng CD, Lin WL, Chen YW, Cherng CH. Effects of lung protective ventilation on postoperative pulmonary outcomes for prolonged oral cancer combined with free flap surgery. Medicine (Baltimore) 2020; 99:e18999. [PMID: 32000439 PMCID: PMC7004797 DOI: 10.1097/md.0000000000018999] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The intraoperative lung protective ventilation with low tidal volume, positive end expiratory pressure (PEEP) and intermittent lungs recruitment was found to decrease postoperative pulmonary complications. In this retrospective medical records study, we investigated the effects of lung protective ventilation on postoperative pulmonary outcomes among the patients received prolonged oral cancer combined with free flap surgery.We collected the medical records of the patients received oral cancer surgery with the operation time more than 12 hours from January 2011 to December 2015. We recordedFifty nine cases were included. Thirty cases received the lung protective ventilation and 29 cases received conventional ventilation. Compared to the patients received conventional ventilation, the patients received intraoperative lung protective ventilation showedIn conclusion, for the prolonged oral cancer combined with free flap surgery, the intraoperative lung protective ventilation improves postoperative pulmonary outcomes and decreases the duration of ICU stay.
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Affiliation(s)
| | - Wei-Lin Lin
- Department of Anesthesiology, Tri-Service General Hospital and National Defense Medical Center, Taipei, Taiwan
| | | | - Chen-Hwan Cherng
- Department of Anesthesiology, Tri-Service General Hospital and National Defense Medical Center, Taipei, Taiwan
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11
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Arunachalam GR, Chiew YS, Tan CP, Ralib AM, Nor MBM. Patient asynchrony modelling during controlled mechanical ventilation therapy. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2020; 183:105103. [PMID: 31606559 DOI: 10.1016/j.cmpb.2019.105103] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/30/2019] [Accepted: 09/30/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND AND OBJECTIVE Mechanical ventilation therapy of respiratory failure patients can be guided by monitoring patient-specific respiratory mechanics. However, the patient's spontaneous breathing effort during controlled ventilation changes airway pressure waveform and thus affects the model-based identification of patient-specific respiratory mechanics parameters. This study develops a model to estimate respiratory mechanics in the presence of patient effort. METHODS Gaussian effort model (GEM) is a derivative of the single-compartment model with basis function. GEM model uses a linear combination of basis functions to model the nonlinear pressure waveform of spontaneous breathing patients. The GEM model estimates respiratory mechanics such as Elastance and Resistance along with the magnitudes of basis functions, which accounts for patient inspiratory effort. RESULTS AND DISCUSSION The GEM model was tested using both simulated data and a retrospective observational clinical trial patient data. GEM model fitting to the original airway pressure waveform is better than any existing models when reverse triggering asynchrony is present. The fitting error of GEM model was less than 10% for both simulated data and clinical trial patient data. CONCLUSION GEM can capture the respiratory mechanics in the presence of patient effect in volume control ventilation mode and also can be used to assess patient-ventilator interaction. This model determines basis functions magnitudes, which can be used to simulate any waveform of patient effort pressure for future studies. The estimation of parameter identification GEM model can further be improved by constraining the parameters within a physiologically plausible range during least-square nonlinear regression.
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Affiliation(s)
| | | | - Chee Pin Tan
- School of Engineering, Monash University, Subang Jaya, Malaysia
| | - Azrina Mohd Ralib
- Department of Intensive Care, International Islamic University Malaysia Medical Centre, Kuantan, Malaysia
| | - Mohd Basri Mat Nor
- Department of Intensive Care, International Islamic University Malaysia Medical Centre, Kuantan, Malaysia
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12
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Maia LDA, Fernandes MVS, Santos RS, Agra LC, Carvalho AC, Rocha NDN, Oliveira MV, Santos CL, Morales MM, Capelozzi VL, Souza SAL, Gutfilen B, Schultz MJ, Gama de Abreu M, Pelosi P, Silva PL, Rocco PRM. Effects of Protective Mechanical Ventilation With Different PEEP Levels on Alveolar Damage and Inflammation in a Model of Open Abdominal Surgery: A Randomized Study in Obese Versus Non-obese Rats. Front Physiol 2019; 10:1513. [PMID: 31920717 PMCID: PMC6930834 DOI: 10.3389/fphys.2019.01513] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Accepted: 12/02/2019] [Indexed: 11/22/2022] Open
Abstract
Intraoperative positive end-expiratory pressure (PEEP) has been proposed to restore lung volumes and improve respiratory function in obesity. However, the biological impact of different PEEP levels on the lungs in obesity remains unknown. We aimed to compare the effects of PEEP = 2 cmH2O versus PEEP = 6 cmH2O during ventilation with low tidal volumes on lung function, histology, and biological markers in obese and non-obese rats undergoing open abdominal surgery. Forty-two Wistar rats (21 obese, 21 non-obese) were anesthetized and tracheotomized, and laparotomy was performed with standardized bowel manipulation. Rats were randomly ventilated with protective tidal volume (7 ml/kg) at PEEP = 2 cmH2O or PEEP = 6 cmH2O for 4 h, after which they were euthanized. Lung mechanics and histology, alveolar epithelial cell integrity, and biological markers associated with pulmonary inflammation, alveolar stretch, extracellular matrix, and epithelial and endothelial cell damage were analyzed. In obese rats, PEEP = 6 cmH2O compared with PEEP = 2 cmH2O was associated with less alveolar collapse (p = 0.02). E-cadherin expression was not different between the two PEEP groups. Gene expressions of interleukin (IL)-6 (p = 0.01) and type III procollagen (p = 0.004), as well as protein levels of tumor necrosis factor-alpha (p = 0.016), were lower at PEEP = 6 cmH2O than at PEEP = 2 cmH2O. In non-obese animals, PEEP = 6 cmH2O compared with PEEP = 2 cmH2O led to increased hyperinflation, reduced e-cadherin (p = 0.04), and increased gene expression of IL-6 (p = 0.004) and protein levels of tumor necrosis factor-alpha (p-0.029), but no changes in fibrogenesis. In conclusion, PEEP = 6 cmH2O reduced lung damage and inflammation in an experimental model of mechanical ventilation for open abdominal surgery, but only in obese animals.
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Affiliation(s)
- Lígia de A Maia
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcos V S Fernandes
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Raquel S Santos
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Laís C Agra
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Anna Carolinna Carvalho
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Nazareth de N Rocha
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University, Niterói, Brazil
| | - Milena V Oliveira
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Cíntia L Santos
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcelo M Morales
- Laboratory of Cellular and Molecular Physiology, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Vera L Capelozzi
- Department of Pathology, School of Medicine, University of São Paulo, São Paulo, Brazil
| | - Sergio A L Souza
- Nuclear Medicine Service, Clementino Fraga Filho University Hospital, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Bianca Gutfilen
- Nuclear Medicine Service, Clementino Fraga Filho University Hospital, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcus J Schultz
- Department of Intensive Care, Laboratory of Experimental Intensive Care and Anesthesiology (L.E.I.C.A.), Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Marcelo Gama de Abreu
- Department of Anesthesiology and Intensive Care Therapy, Pulmonary Engineering Group, University Hospital Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
| | - Paolo Pelosi
- Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Genoa, Italy.,San Martino Policlinico Hospital, IRCCS for Oncology and Neurosciences, Genoa, Italy
| | - Pedro L Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Patricia R M Rocco
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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13
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Intra-operative high inspired oxygen during open abdominal surgery and postoperative pulmonary complications: From physiology to individualised strategies. Eur J Anaesthesiol 2019; 36:317-319. [PMID: 30946170 DOI: 10.1097/eja.0000000000000981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Ingelse SA, Juschten J, Maas MAW, Matute-Bello G, Juffermans NP, van Woensel JBM, Bem RA. Fluid restriction reduces pulmonary edema in a model of acute lung injury in mechanically ventilated rats. PLoS One 2019; 14:e0210172. [PMID: 30653512 PMCID: PMC6336323 DOI: 10.1371/journal.pone.0210172] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 12/18/2018] [Indexed: 02/06/2023] Open
Abstract
Experimental acute lung injury models are often used to increase our knowledge on the acute respiratory distress syndrome (ARDS), however, existing animal models often do not take into account the impact of specific fluid strategies on the development of lung injury. In contrast, the current literature strongly suggests that fluid management strategies have a significant impact on clinical outcome of patients with ARDS. Thus, it is important to characterize the role of fluid management strategies in experimental models of lung injury. In this study we investigated the effect of two different fluid strategies on commonly used outcome variables in a short-term model of acute lung injury, in relation to age. Infant (2–3 weeks) and adult (3–4 months) Wistar rats received intratracheal instillations of lipopolysaccharide and 24 hours later were mechanically ventilated for 6 hours. During mechanical ventilation, rats from both age groups were randomized to either a standard or conservative intravenous fluid strategy. We found that the hemodynamic response in infant and adult rats was similar in both fluid strategies. Lung wet-to-dry ratios were lower in adult, but not in infant rats receiving the conservative fluid strategy as compared to the standard fluid strategy. There were age-related differences in markers of alveolar capillary barrier disruption and alveolar fluid clearance, yet these were unaffected by fluid strategy. Finally, we found significantly higher IL-1β and TNF-α concentrations in the adult rats treated with the conservative as compared to the standard fluid regimen. In conclusion, the choice of fluid strategy in mechanically ventilated rats with experimental LPS-induced acute lung injury has a significant effect on pulmonary extravascular water, an important and well-recognized lung injury marker, and on the local pro-inflammatory cytokine profiles. We advocate the use of a more uniform, conservative, fluid strategy regimen in experimental models of acute lung injury.
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Affiliation(s)
- Sarah A. Ingelse
- Pediatric Intensive Care Unit, Emma Children’s Hospital, Academic Medical Center, Amsterdam, The Netherlands
- Laboratory of Experimental Intensive Care and Anesthesiology (L·E·I·C·A), Academic Medical Center, Amsterdam, The Netherlands
- * E-mail:
| | - Jenny Juschten
- Laboratory of Experimental Intensive Care and Anesthesiology (L·E·I·C·A), Academic Medical Center, Amsterdam, The Netherlands
- Department of Intensive Care, Academic Medical Center, Amsterdam, The Netherlands
- Department of Intensive Care and Research VUmc Intensive Care (REVIVE), VU Medical Center, Amsterdam, The Netherlands
| | - Martinus A. W. Maas
- Laboratory of Experimental Intensive Care and Anesthesiology (L·E·I·C·A), Academic Medical Center, Amsterdam, The Netherlands
| | - Gustavo Matute-Bello
- Center for Lung Biology, Division of Pulmonary, Critical Care and Sleep Medicine, University of Washington, and Medical Research Service, VA Puget Sound Healthcare System, Seattle, WA, United States of America
| | - Nicole P. Juffermans
- Laboratory of Experimental Intensive Care and Anesthesiology (L·E·I·C·A), Academic Medical Center, Amsterdam, The Netherlands
- Department of Intensive Care, Academic Medical Center, Amsterdam, The Netherlands
| | - Job B. M. van Woensel
- Pediatric Intensive Care Unit, Emma Children’s Hospital, Academic Medical Center, Amsterdam, The Netherlands
| | - Reinout A. Bem
- Pediatric Intensive Care Unit, Emma Children’s Hospital, Academic Medical Center, Amsterdam, The Netherlands
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15
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16
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Belda J, Ferrando C, Garutti I. The Effects of an Open-Lung Approach During One-Lung Ventilation on Postoperative Pulmonary Complications and Driving Pressure: A Descriptive, Multicenter National Study. J Cardiothorac Vasc Anesth 2018; 32:2665-2672. [DOI: 10.1053/j.jvca.2018.03.028] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Indexed: 11/11/2022]
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17
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Serpa Neto A, Deliberato RO, Johnson AEW, Bos LD, Amorim P, Pereira SM, Cazati DC, Cordioli RL, Correa TD, Pollard TJ, Schettino GPP, Timenetsky KT, Celi LA, Pelosi P, Gama de Abreu M, Schultz MJ. Mechanical power of ventilation is associated with mortality in critically ill patients: an analysis of patients in two observational cohorts. Intensive Care Med 2018; 44:1914-1922. [PMID: 30291378 DOI: 10.1007/s00134-018-5375-6] [Citation(s) in RCA: 257] [Impact Index Per Article: 42.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 09/10/2018] [Indexed: 12/21/2022]
Abstract
PURPOSE Mechanical power (MP) may unify variables known to be related to development of ventilator-induced lung injury. The aim of this study is to examine the association between MP and mortality in critically ill patients receiving invasive ventilation for at least 48 h. METHODS This is an analysis of data stored in the databases of the MIMIC-III and eICU. Critically ill patients receiving invasive ventilation for at least 48 h were included. The exposure of interest was MP. The primary outcome was in-hospital mortality. RESULTS Data from 8207 patients were analyzed. Median MP during the second 24 h was 21.4 (16.2-28.1) J/min in MIMIC-III and 16.0 (11.7-22.1) J/min in eICU. MP was independently associated with in-hospital mortality [odds ratio per 5 J/min increase (OR) 1.06 (95% confidence interval (CI) 1.01-1.11); p = 0.021 in MIMIC-III, and 1.10 (1.02-1.18); p = 0.010 in eICU]. MP was also associated with ICU mortality, 30-day mortality, and with ventilator-free days, ICU and hospital length of stay. Even at low tidal volume, high MP was associated with in-hospital mortality [OR 1.70 (1.32-2.18); p < 0.001] and other secondary outcomes. Finally, there is a consistent increase in the risk of death with MP higher than 17.0 J/min. CONCLUSION High MP of ventilation is independently associated with higher in-hospital mortality and several other outcomes in ICU patients receiving invasive ventilation for at least 48 h.
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Affiliation(s)
- Ary Serpa Neto
- Department of Intensive Care and Laboratory of Experimental Intensive Care and Anesthesiology (LEICA), Academic Medical Center, Amsterdam, The Netherlands.
- Department of Critical Care Medicine, Hospital Israelita Albert Einstein, Albert Einstein Avenue, 700, São Paulo, Brazil.
- Laboratory for Critical Care Research, Hospital Israelita Albert Einstein, São Paulo, Brazil.
| | - Rodrigo Octavio Deliberato
- Department of Critical Care Medicine, Hospital Israelita Albert Einstein, Albert Einstein Avenue, 700, São Paulo, Brazil
- Laboratory for Critical Care Research, Hospital Israelita Albert Einstein, São Paulo, Brazil
- Big Data Analytics Group, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | - Alistair E W Johnson
- Laboratory for Computational Physiology, Institute for Medical Engineering and Science, MIT, Cambridge, MA, USA
| | - Lieuwe D Bos
- Department of Intensive Care and Laboratory of Experimental Intensive Care and Anesthesiology (LEICA), Academic Medical Center, Amsterdam, The Netherlands
| | - Pedro Amorim
- Department of Innovation, Hospital Israelita Albert Einstein, São Paulo, Brazil
| | | | - Denise Carnieli Cazati
- Department of Critical Care Medicine, Hospital Israelita Albert Einstein, Albert Einstein Avenue, 700, São Paulo, Brazil
| | - Ricardo L Cordioli
- Department of Critical Care Medicine, Hospital Israelita Albert Einstein, Albert Einstein Avenue, 700, São Paulo, Brazil
| | - Thiago Domingos Correa
- Department of Critical Care Medicine, Hospital Israelita Albert Einstein, Albert Einstein Avenue, 700, São Paulo, Brazil
| | - Tom J Pollard
- Laboratory for Computational Physiology, Institute for Medical Engineering and Science, MIT, Cambridge, MA, USA
| | - Guilherme P P Schettino
- Department of Critical Care Medicine, Hospital Israelita Albert Einstein, Albert Einstein Avenue, 700, São Paulo, Brazil
| | - Karina T Timenetsky
- Department of Critical Care Medicine, Hospital Israelita Albert Einstein, Albert Einstein Avenue, 700, São Paulo, Brazil
| | - Leo A Celi
- Laboratory for Computational Physiology, Institute for Medical Engineering and Science, MIT, Cambridge, MA, USA
- Division of Pulmonary, Critical Care and Sleep Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Paolo Pelosi
- Department of Surgical Sciences and Integrated Diagnostics, San Martino Policlinico Hospital, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) for Oncology, Genoa, Italy
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genoa, Italy
| | - Marcelo Gama de Abreu
- Pulmonary Engineering Group, Department of Anesthesiology and Intensive Care Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Marcus J Schultz
- Department of Intensive Care and Laboratory of Experimental Intensive Care and Anesthesiology (LEICA), Academic Medical Center, Amsterdam, The Netherlands
- Mahidol Oxford Tropical Medicine Research Unit (MORU), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
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18
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Dissipation of energy during the respiratory cycle: conditional importance of ergotrauma to structural lung damage. Curr Opin Crit Care 2018; 24:16-22. [PMID: 29176330 DOI: 10.1097/mcc.0000000000000470] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
PURPOSE OF REVIEW To describe and put into context recent conceptual advances regarding the relationship of energy load and power to ventilator-induced lung injury (VILI). RECENT FINDINGS Investigative emphasis regarding VILI has almost exclusively centered on the static characteristics of the individual tidal cycle - tidal volume, plateau pressure, positive end-expiratory pressure, and driving pressure. Although those static characteristics of the tidal cycle are undeniably important, the 'dynamic' characteristics of ventilation must not be ignored. To inflict the nonrupturing damage we identify as VILI, work must be performed and energy expended by high stress cycles applied at rates that exceed the capacity of endogenous repair. Machine power, the pace at which the work performing energy load is applied by the ventilator, has received increasing scrutiny as a candidate for the proximate and integrative cause of VILI. SUMMARY Although the unmodified values of machine-delivered energy or power (which are based on airway pressures and tidal volumes) cannot serve unconditionally as a rigid and quantitative guide to ventilator adjustment for lung protection, bedside consideration of the dynamics of ventilation and potential for ergotrauma represents a clear conceptual advance that complements the static parameters of the individual tidal cycle that with few exceptions have held our scientific attention.
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19
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Grieco DL, Russo A, Romanò B, Anzellotti GM, Ciocchetti P, Torrini F, Barelli R, Eleuteri D, Perilli V, Dell'Anna AM, Bongiovanni F, Sollazzi L, Antonelli M. Lung volumes, respiratory mechanics and dynamic strain during general anaesthesia. Br J Anaesth 2018; 121:1156-1165. [PMID: 30336861 DOI: 10.1016/j.bja.2018.03.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 03/11/2018] [Accepted: 03/28/2018] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Driving pressure (ΔP) represents tidal volume normalised to respiratory system compliance (CRS) and is a novel parameter to target ventilator settings. We conducted a study to determine whether CRS and ΔP reflect aerated lung volume and dynamic strain during general anaesthesia. METHODS Twenty non-obese patients undergoing open abdominal surgery received three PEEP levels (2, 7, or 12 cm H2O) in random order with constant tidal volume ventilation. Respiratory mechanics, lung volumes, and alveolar recruitment were measured to assess end-expiratory aerated volume, which was compared with the patient's individual predicted functional residual capacity in supine position (FRCp). RESULTS CRS was linearly related to aerated volume and ΔP to dynamic strain at PEEP of 2 cm H2O (intraoperative FRC) (r=0.72 and r=0.73, both P<0.001). These relationships were maintained with higher PEEP only when aerated volume did not overcome FRCp (r=0.73, P<0.001; r=0.54, P=0.004), with 100 ml lung volume increases accompanied by 1.8 ml cm H2O-1 (95% confidence interval [1.1-2.5]) increases in CRS. When aerated volume was greater or equal to FRCp (35% of patients at PEEP 2 cm H2O, 55% at PEEP 7 cm H2O, and 75% at PEEP 12 cm H2O), CRS and ΔP were independent from aerated volume and dynamic strain, with CRS weakly but significantly inversely related to alveolar dead space fraction (r=-0.47, P=0.001). PEEP-induced alveolar recruitment yielded higher CRS and reduced ΔP only at aerated volumes below FRCp (P=0.015 and 0.008, respectively). CONCLUSIONS During general anaesthesia, respiratory system compliance and driving pressure reflect aerated lung volume and dynamic strain, respectively, only if aerated volume does not exceed functional residual capacity in supine position, which is a frequent event when PEEP is used in this setting.
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Affiliation(s)
- D L Grieco
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Fondazione "Policlinico Universitario A. Gemelli", Rome, Italy.
| | - A Russo
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Fondazione "Policlinico Universitario A. Gemelli", Rome, Italy
| | - B Romanò
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Fondazione "Policlinico Universitario A. Gemelli", Rome, Italy
| | - G M Anzellotti
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Fondazione "Policlinico Universitario A. Gemelli", Rome, Italy
| | - P Ciocchetti
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Fondazione "Policlinico Universitario A. Gemelli", Rome, Italy
| | - F Torrini
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Fondazione "Policlinico Universitario A. Gemelli", Rome, Italy
| | - R Barelli
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Fondazione "Policlinico Universitario A. Gemelli", Rome, Italy
| | - D Eleuteri
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Fondazione "Policlinico Universitario A. Gemelli", Rome, Italy
| | - V Perilli
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Fondazione "Policlinico Universitario A. Gemelli", Rome, Italy
| | - A M Dell'Anna
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Fondazione "Policlinico Universitario A. Gemelli", Rome, Italy
| | - F Bongiovanni
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Fondazione "Policlinico Universitario A. Gemelli", Rome, Italy
| | - L Sollazzi
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Fondazione "Policlinico Universitario A. Gemelli", Rome, Italy
| | - M Antonelli
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Fondazione "Policlinico Universitario A. Gemelli", Rome, Italy
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