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Cammarota G, Vaschetto R, Vetrugno L, Maggiore SM. Monitoring lung recruitment. Curr Opin Crit Care 2024; 30:268-274. [PMID: 38690956 DOI: 10.1097/mcc.0000000000001157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
PURPOSE OF REVIEW This review explores lung recruitment monitoring, covering techniques, challenges, and future perspectives. RECENT FINDINGS Various methodologies, including respiratory system mechanics evaluation, arterial bold gases (ABGs) analysis, lung imaging, and esophageal pressure (Pes) measurement are employed to assess lung recruitment. In support to ABGs analysis, the assessment of respiratory mechanics with hysteresis and recruitment-to-inflation ratio has the potential to evaluate lung recruitment and enhance mechanical ventilation setting. Lung imaging tools, such as computed tomography scanning, lung ultrasound, and electrical impedance tomography (EIT) confirm their utility in following lung recruitment with the advantage of radiation-free and repeatable application at the bedside for sonography and EIT. Pes enables the assessment of dorsal lung tendency to collapse through end-expiratory transpulmonary pressure. Despite their value, these methodologies may require an elevated expertise in their application and data interpretation. However, the information obtained by these methods may be conveyed to build machine learning and artificial intelligence algorithms aimed at improving the clinical decision-making process. SUMMARY Monitoring lung recruitment is a crucial component of managing patients with severe lung conditions, within the framework of a personalized ventilatory strategy. Although challenges persist, emerging technologies offer promise for a personalized approach to care in the future.
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Affiliation(s)
- Gianmaria Cammarota
- Department of Translational Medicine, Università del Piemonte Orientale, Novara
| | - Rosanna Vaschetto
- Department of Translational Medicine, Università del Piemonte Orientale, Novara
| | - Luigi Vetrugno
- Department of Medical, Oral and Biotechnological Sciences
| | - Salvatore M Maggiore
- Department of Anesthesiology and Intensive Care, Ospedale SS Annunziata & Department of Innovative Technologies in Medicine and Odonto-stomatology, Università Gabriele D'Annunzio di Chieti-Pescara, Chieti, Italy
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2
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Battaglini D, Roca O, Ferrer R. Positive end-expiratory pressure optimization in ARDS: physiological evidence, bedside methods and clinical applications. Intensive Care Med 2024; 50:762-765. [PMID: 38568234 DOI: 10.1007/s00134-024-07397-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 03/18/2024] [Indexed: 05/09/2024]
Affiliation(s)
- Denise Battaglini
- Anesthesia and Intensive Care, IRCCS Ospedale Policlinico San Martino, Genoa, Italy
| | - Oriol Roca
- Servei de Medicina Intensiva, Parc Taulí Hospital Universitari, Institut de Recerca Part Taulí (I3PT-CERCA), Parc del Taulí 1, 08028, Sabadell, Spain
- Departament de Medicina, Universitat Autònoma de Barcelona, Bellaterra, Spain
- Ciber Enfermedades Respiratorias (Ciberes), Instituto de Salud Carlos III, Madrid, Spain
| | - Ricard Ferrer
- Departament de Medicina, Universitat Autònoma de Barcelona, Bellaterra, Spain.
- Intensive Care Department, Vall d'Hebron University Hospital, Barcelona, Spain.
- Shock, Organ Dysfunction and Resuscitation (SODIR) Research Group, Vall d'Hebron Institut de Recerca, Barcelona, Spain.
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3
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Lee JH, Kang P, Park JB, Ji SH, Jang YE, Kim EH, Kim JT, Kim HS. Determination of optimal positive end-expiratory pressure using electrical impedance tomography in infants under general anesthesia: Comparison between supine and prone positions. Paediatr Anaesth 2024. [PMID: 38693633 DOI: 10.1111/pan.14914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 04/04/2024] [Accepted: 04/17/2024] [Indexed: 05/03/2024]
Abstract
AIMS This study determined the optimal positive end-expiratory pressure levels in infants in supine and prone positions under general anesthesia using electrical impedance tomography (EIT). METHODS This prospective observational single-centre study included infants scheduled for surgery in the prone position. An electrical impedance tomography sensor was applied after inducing general anesthesia. The optimal positive end-expiratory pressure in the supine position was determined in a decremental trial based on EIT and compliance. Subsequently, the patient's position was changed to prone. Electrical impedance tomography parameters, including global inhomogeneity index, regional ventilation delay, opening pressure, the centre of ventilation, and pendelluft volume, were continuously obtained up to 1 h after prone positioning. The optimal positive end-expiratory pressure in the prone position was similarly determined. RESULTS Data from 30 infants were analyzed. The mean value of electrical impedance tomography-based optimal positive end-expiratory pressure in the prone position was significantly higher than that in the supine position [10.9 (1.6) cmH2O and 6.1 (0.9) cmH2O, respectively (p < .001)]. Significant differences were observed between electrical impedance tomography- and compliance-based optimal positive end-expiratory pressure. Peak and mean airway, plateau, and driving pressures increased 1 h after prone positioning compared with those in the supine position. In addition, the centre of ventilation for balance in ventilation between the ventral and dorsal regions improved. CONCLUSION The prone position required higher positive end-expiratory pressure than the supine position in mechanically ventilated infants under general anesthesia. EIT is a promising tool to find the optimal positive end-expiratory pressure, which needs to be individualized.
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Affiliation(s)
- Ji-Hyun Lee
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, South Korea
| | - Pyoyoon Kang
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, South Korea
| | - Jung-Bin Park
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, South Korea
| | - Sang-Hwan Ji
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, South Korea
| | - Young-Eun Jang
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, South Korea
| | - Eun-Hee Kim
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, South Korea
| | - Jin-Tae Kim
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, South Korea
| | - Hee-Soo Kim
- Department of Anesthesiology and Pain Medicine, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, South Korea
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4
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Gattinoni L, Collino F, Camporota L. Assessing lung recruitability: does it help with PEEP settings? Intensive Care Med 2024; 50:749-751. [PMID: 38536421 PMCID: PMC11078853 DOI: 10.1007/s00134-024-07351-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Accepted: 02/09/2024] [Indexed: 05/09/2024]
Affiliation(s)
- Luciano Gattinoni
- Department of Anesthesiology, University Medical Center Göttingen, Robert Koch Straße 40, 37075, Göttingen, Germany.
| | | | - Luigi Camporota
- Department of Adult Critical Care, Centre for Human and Applied Physiological Sciences, Guy's and St. Thomas' NHS Foundation Trust, King's College London, London, UK
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5
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Songsangvorn N, Xu Y, Lu C, Rotstein O, Brochard L, Slutsky AS, Burns KEA, Zhang H. Electrical impedance tomography-guided positive end-expiratory pressure titration in ARDS: a systematic review and meta-analysis. Intensive Care Med 2024; 50:617-631. [PMID: 38512400 PMCID: PMC11078723 DOI: 10.1007/s00134-024-07362-2] [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: 12/16/2023] [Accepted: 02/14/2024] [Indexed: 03/23/2024]
Abstract
PURPOSE Assessing efficacy of electrical impedance tomography (EIT) in optimizing positive end-expiratory pressure (PEEP) for acute respiratory distress syndrome (ARDS) patients to enhance respiratory system mechanics and prevent ventilator-induced lung injury (VILI), compared to traditional methods. METHODS We carried out a systematic review and meta-analysis, spanning literature from January 2012 to May 2023, sourced from Scopus, PubMed, MEDLINE (Ovid), Cochrane, and LILACS, evaluated EIT-guided PEEP strategies in ARDS versus conventional methods. Thirteen studies (3 randomized, 10 non-randomized) involving 623 ARDS patients were analyzed using random-effects models for primary outcomes (respiratory mechanics and mechanical power) and secondary outcomes (PaO2/FiO2 ratio, mortality, stays in intensive care unit (ICU), ventilator-free days). RESULTS EIT-guided PEEP significantly improved lung compliance (n = 941 cases, mean difference (MD) = 4.33, 95% confidence interval (CI) [2.94, 5.71]), reduced mechanical power (n = 148, MD = - 1.99, 95% CI [- 3.51, - 0.47]), and lowered driving pressure (n = 903, MD = - 1.20, 95% CI [- 2.33, - 0.07]) compared to traditional methods. Sensitivity analysis showed consistent positive effect of EIT-guided PEEP on lung compliance in randomized clinical trials vs. non-randomized studies pooled (MD) = 2.43 (95% CI - 0.39 to 5.26), indicating a trend towards improvement. A reduction in mortality rate (259 patients, relative risk (RR) = 0.64, 95% CI [0.45, 0.91]) was associated with modest improvements in compliance and driving pressure in three studies. CONCLUSIONS EIT facilitates real-time, individualized PEEP adjustments, improving respiratory system mechanics. Integration of EIT as a guiding tool in mechanical ventilation holds potential benefits in preventing ventilator-induced lung injury. Larger-scale studies are essential to validate and optimize EIT's clinical utility in ARDS management.
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Affiliation(s)
- Nickjaree Songsangvorn
- Keenan Research Centre for Biomedical Science and the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Department of Critical Care Medicine, Bhumibol Adulyadej Hospital, Bangkok, Thailand
| | - Yonghao Xu
- Keenan Research Centre for Biomedical Science and the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada.
- The State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
| | - Cong Lu
- Keenan Research Centre for Biomedical Science and the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
| | - Ori Rotstein
- Keenan Research Centre for Biomedical Science and the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Laurent Brochard
- Keenan Research Centre for Biomedical Science and the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
| | - Arthur S Slutsky
- Keenan Research Centre for Biomedical Science and the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
| | - Karen E A Burns
- Keenan Research Centre for Biomedical Science and the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
| | - Haibo Zhang
- Keenan Research Centre for Biomedical Science and the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada.
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada.
- Department of Physiology, University of Toronto, Toronto, ON, Canada.
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, ON, Canada.
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Sarkar S, Yalla B, Khanna P, Baishya M. Is EIT-guided positive end-expiratory pressure titration for optimizing PEEP in ARDS the white elephant in the room? A systematic review with meta-analysis and trial sequential analysis. J Clin Monit Comput 2024:10.1007/s10877-024-01158-x. [PMID: 38619718 DOI: 10.1007/s10877-024-01158-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Accepted: 03/23/2024] [Indexed: 04/16/2024]
Abstract
Electrical Impedance Tomography (EIT) is a novel real-time lung imaging technology for personalized ventilation adjustments, indicating promising results in animals and humans. The present study aimed to assess its clinical utility for improved ventilation and oxygenation compared to traditional protocols. Comprehensive electronic database screening was done until 30th November, 2023. Randomized controlled trials, controlled clinical trials, comparative cohort studies, and assessments of EIT-guided PEEP titration and conventional methods in adult ARDS patients regarding outcome, ventilatory parameters, and P/F ratio were included. Our search retrieved five controlled cohort studies and two RCTs with 515 patients and overall reduced risk of mortality [RR = 0.68; 95% CI: 0.49 to 0.95; I2 = 0%], better dynamic compliance [MD = 3.46; 95% CI: 1.59 to 5.34; I2 = 0%] with no significant difference in PaO2/FiO2 ratio [MD = 6.5; 95%CI -13.86 to 26.76; I2 = 74%]. The required information size except PaO2/FiO2 was achieved for a power of 95% based on the 50% reduction in risk of mortality, 10% improved compliance as the cumulative Z-score of the said outcomes crossed the alpha spending boundary and did not dip below the inner wedge of futility. EIT-guided individualized PEEP titration is a novel modality; further well-designed studies are needed to substantiate its utility.
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Affiliation(s)
- Soumya Sarkar
- Department of Anaesthesiology, AIIMS, Kalyani, India
| | - Bharat Yalla
- Department of Anaesthesia, Pain Medicine & Critical Care, AIIMS, Ansari Nagar, New Delhi, 110029, India
| | - Puneet Khanna
- Department of Anaesthesia, Pain Medicine & Critical Care, AIIMS, Ansari Nagar, New Delhi, 110029, India.
| | - Madhurjya Baishya
- Department of Anaesthesia, Pain Medicine & Critical Care, AIIMS, Ansari Nagar, New Delhi, 110029, India
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7
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Roeder F, Röpke T, Steinmetz LK, Kolb M, Maus UA, Smith BJ, Knudsen L. Exploring alveolar recruitability using positive end-expiratory pressure in mice overexpressing TGF-β1: a structure-function analysis. Sci Rep 2024; 14:8080. [PMID: 38582767 PMCID: PMC10998853 DOI: 10.1038/s41598-024-58213-5] [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: 12/11/2023] [Accepted: 03/26/2024] [Indexed: 04/08/2024] Open
Abstract
Pre-injured lungs are prone to injury progression in response to mechanical ventilation. Heterogeneous ventilation due to (micro)atelectases imparts injurious strains on open alveoli (known as volutrauma). Hence, recruitment of (micro)atelectases by positive end-expiratory pressure (PEEP) is necessary to interrupt this vicious circle of injury but needs to be balanced against acinar overdistension. In this study, the lung-protective potential of alveolar recruitment was investigated and balanced against overdistension in pre-injured lungs. Mice, treated with empty vector (AdCl) or adenoviral active TGF-β1 (AdTGF-β1) were subjected to lung mechanical measurements during descending PEEP ventilation from 12 to 0 cmH2O. At each PEEP level, recruitability tests consisting of two recruitment maneuvers followed by repetitive forced oscillation perturbations to determine tissue elastance (H) and damping (G) were performed. Finally, lungs were fixed by vascular perfusion at end-expiratory airway opening pressures (Pao) of 20, 10, 5 and 2 cmH2O after a recruitment maneuver, and processed for design-based stereology to quantify derecruitment and distension. H and G were significantly elevated in AdTGF-β1 compared to AdCl across PEEP levels. H was minimized at PEEP = 5-8 cmH2O and increased at lower and higher PEEP in both groups. These findings correlated with increasing septal wall folding (= derecruitment) and reduced density of alveolar number and surface area (= distension), respectively. In AdTGF-β1 exposed mice, 27% of alveoli remained derecruited at Pao = 20 cmH2O. A further decrease in Pao down to 2 cmH2O showed derecruitment of an additional 1.1 million alveoli (48%), which was linked with an increase in alveolar size heterogeneity at Pao = 2-5 cmH2O. In AdCl, decreased Pao resulted in septal folding with virtually no alveolar collapse. In essence, in healthy mice alveoli do not derecruit at low PEEP ventilation. The potential of alveolar recruitability in AdTGF-β1 exposed mice is high. H is optimized at PEEP 5-8 cmH2O. Lower PEEP folds and larger PEEP stretches septa which results in higher H and is more pronounced in AdTGF-β1 than in AdCl. The increased alveolar size heterogeneity at Pao = 5 cmH2O argues for the use of PEEP = 8 cmH2O for lung protective mechanical ventilation in this animal model.
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Affiliation(s)
- Franziska Roeder
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
| | - Tina Röpke
- Department of Experimental Pneumology, Hannover Medical School, Hannover, Germany
| | | | - Martin Kolb
- Department of Medicine, Firestone Institute for Respiratory Health, McMaster University, Hamilton, ON, Canada
| | - Ulrich A Maus
- Department of Experimental Pneumology, Hannover Medical School, Hannover, Germany
- Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Disease (DZL), Hannover, Germany
| | - Bradford J Smith
- Department of Bioengineering, College of Engineering Design and Computing, University of Colorado Denver|Anschutz Medical Campus, Aurora, CO, USA
- Department of Pediatric Pulmonary and Sleep Medicine, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Lars Knudsen
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany.
- Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Disease (DZL), Hannover, Germany.
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8
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Szuldrzynski K, Kowalewski M, Swol J. Mechanical ventilation during extracorporeal membrane oxygenation support - New trends and continuing challenges. Perfusion 2024; 39:107S-114S. [PMID: 38651573 DOI: 10.1177/02676591241232270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
BACKGROUND The impact of mechanical ventilation on the survival of patients supported with veno-venous extracorporeal membrane oxygenation (V-V ECMO) due to severe acute respiratory distress syndrome (ARDS) remains still a focus of research. METHODS Recent guidelines, randomized trials, and registry data underscore the importance of lung-protective ventilation during respiratory and cardiac support on ECMO. RESULTS This approach includes decreasing mechanical power delivery by reducing tidal volume and driving pressure as much as possible, using low or very low respiratory rate, and a personalized approach to positive-end expiratory pressure (PEEP) setting. Notably, the use of ECMO in awake and spontaneously breathing patients is increasing, especially as a bridging strategy to lung transplantation. During respiratory support in V-V ECMO, native lung function is of highest importance and adjustments of blood flow on ECMO, or ventilator settings significantly impact the gas exchange. These interactions are more complex in veno-arterial (V-A) ECMO configuration and cardiac support. The fraction on delivered oxygen in the sweep gas and sweep gas flow rate, blood flow per minute, and oxygenator efficiency have an impact on gas exchange on device side. On the patient side, native cardiac output, native lung function, carbon dioxide production (VCO2), and oxygen consumption (VO2) play a role. Avoiding pulmonary oedema includes left ventricle (LV) distension monitoring and prevention, pulse pressure >10 mm Hg and aortic valve opening assessment, higher PEEP adjustment, use of vasodilators, ECMO flow adjustment according to the ejection fraction, moderate use of inotropes, diuretics, or venting strategies as indicated and according to local expertise and resources. CONCLUSION Understanding the physiological principles of gas exchange during cardiac support on femoro-femoral V-A ECMO configuration and the interactions with native gas exchange and haemodynamics are essential for the safe applications of these techniques in clinical practice. Proning during ECMO remains to be discussed until further data is available from prospective, randomized trials implementing individualized PEEP titration during proning.
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Affiliation(s)
- Konstanty Szuldrzynski
- Department of Anaesthesiology and Intensive Care, National Institute of Medicine of the Ministry of Interior and Administration in Warsaw, Warsaw, Poland
| | - Mariusz Kowalewski
- Department of Cardiac Surgery and Transplantology, National Medical Institute of the Ministry of Interior and Administration, Warsaw, Poland
- Thoracic Research Centre, Collegium Medicum Nicolaus Copernicus University, Innovative Medical Forum, Bydgoszcz, Poland
- Department for the Treatment and Study of Cardiothoracic Diseases and Cardiothoracic Transplantation, IRCCS-ISMETT, Palermo, Italy
- Cardio-Thoracic Surgery Department, Heart and Vascular Centre, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Justyna Swol
- Department of Respiratory Medicine, Paracelsus Medical University, Nuremberg, Germany
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9
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Roca O, Telias I, Grieco DL. Bedside-available strategies to minimise P-SILI and VILI during ARDS. Intensive Care Med 2024; 50:597-601. [PMID: 38498168 DOI: 10.1007/s00134-024-07366-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Accepted: 02/17/2024] [Indexed: 03/20/2024]
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.
- Ciber Enfermedades Respiratorias (Ciberes), Instituto de Salud Carlos III, Madrid, Spain.
| | - Irene Telias
- Keenan Research Centre for Biomedical Science, Li Ka Shing Knowledge Institute, St Michael's Hospital, Unity Health Toronto, Toronto, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
- Division of Respirology, Department of Medicine, University Health Network and Sinai Health System, Toronto, Canada
| | - Domenico L Grieco
- Department of Emergency, Intensive Care Medicine and Anesthesia, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
- Department of Anesthesiology and Intensive Care Medicine, Catholic University of the Sacred Heart, Rome, Italy
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10
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Franchineau G, Jonkman AH, Piquilloud L, Yoshida T, Costa E, Rozé H, Camporota L, Piraino T, Spinelli E, Combes A, Alcala GC, Amato M, Mauri T, Frerichs I, Brochard LJ, Schmidt M. Electrical Impedance Tomography to Monitor Hypoxemic Respiratory Failure. Am J Respir Crit Care Med 2024; 209:670-682. [PMID: 38127779 DOI: 10.1164/rccm.202306-1118ci] [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: 07/01/2023] [Accepted: 12/20/2023] [Indexed: 12/23/2023] Open
Abstract
Hypoxemic respiratory failure is one of the leading causes of mortality in intensive care. Frequent assessment of individual physiological characteristics and delivery of personalized mechanical ventilation (MV) settings is a constant challenge for clinicians caring for these patients. Electrical impedance tomography (EIT) is a radiation-free bedside monitoring device that is able to assess regional lung ventilation and changes in aeration. With real-time tomographic functional images of the lungs obtained through a thoracic belt, clinicians can visualize and estimate the distribution of ventilation at different ventilation settings or following procedures such as prone positioning. Several studies have evaluated the performance of EIT to monitor the effects of different MV settings in patients with acute respiratory distress syndrome, allowing more personalized MV. For instance, EIT could help clinicians find the positive end-expiratory pressure that represents a compromise between recruitment and overdistension and assess the effect of prone positioning on ventilation distribution. The clinical impact of the personalization of MV remains to be explored. Despite inherent limitations such as limited spatial resolution, EIT also offers a unique noninvasive bedside assessment of regional ventilation changes in the ICU. This technology offers the possibility of a continuous, operator-free diagnosis and real-time detection of common problems during MV. This review provides an overview of the functioning of EIT, its main indices, and its performance in monitoring patients with acute respiratory failure. Future perspectives for use in intensive care are also addressed.
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Affiliation(s)
- Guillaume Franchineau
- Service de Medecine Intensive Reanimation, Centre Hospitalier Intercommunal de Poissy-Saint-Germain-en-Laye, Poissy, France
| | - Annemijn H Jonkman
- Department of Intensive Care Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Lise Piquilloud
- Adult Intensive Care Unit, Lausanne University Hospital and Lausanne University, Lausanne, Switzerland
| | - Takeshi Yoshida
- Department of Anesthesiology and Intensive Care Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Eduardo Costa
- Pulmonary Division, Cardiopulmonary Department, Heart Institute, University of São Paulo, São Paulo, Brazil
| | - Hadrien Rozé
- Department of Thoraco-Abdominal Anesthesiology and Intensive Care, Bordeaux University Hospital, University of Bordeaux, Bordeaux, France
- Réanimation Polyvalente, Centre Hospitalier Côte Basque, Bayonne, France
| | - Luigi Camporota
- Health Centre for Human and Applied Physiological Sciences, Department of Adult Critical Care, Guy's and St Thomas' National Health Service Foundation Trust, London, United Kingdom
| | - Thomas Piraino
- Keenan Research Centre for Biomedical Science, Li Ka Shing Knowledge Institute, Unity Health Toronto, Toronto, Ontario, Canada
- Division of Critical Care, Department of Anesthesia, McMaster University, Hamilton, Ontario, Canada
| | - Elena Spinelli
- Department of Anesthesia, Critical Care and Emergency, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Alain Combes
- Sorbonne Université, Groupe de Recherche Clinique 30, Réanimation et Soins Intensifs du Patient en Insuffisance Respiratoire Aigüe, UMRS_1166-ICAN, Institute of Cardiometabolism and Nutrition, Service de Médecine Intensive - Réanimation, Assistance Publique-Hôpitaux de Paris (APHP) Hôpital Pitié-Salpêtrière, Paris, France
| | - Glasiele C Alcala
- Pulmonary Division, Cardiopulmonary Department, Heart Institute, University of São Paulo, São Paulo, Brazil
| | - Marcelo Amato
- Pulmonary Division, Cardiopulmonary Department, Heart Institute, University of São Paulo, São Paulo, Brazil
| | - Tommaso Mauri
- Department of Anesthesia, Critical Care and Emergency, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
- Department of Pathophysiology and Transplants, University of Milan, Milan, Italy
| | - Inéz Frerichs
- Department of Anesthesiology and Intensive Care Medicine, University Medical Centre of Schleswig-Holstein Campus Kiel, Kiel, Germany; and
| | - Laurent J Brochard
- Keenan Research Centre for Biomedical Science, Li Ka Shing Knowledge Institute, Unity Health Toronto, Toronto, Ontario, Canada
- Interdepartmental Division of Critical Care, University of Toronto, Toronto, Ontario, Canada
| | - Matthieu Schmidt
- Sorbonne Université, Groupe de Recherche Clinique 30, Réanimation et Soins Intensifs du Patient en Insuffisance Respiratoire Aigüe, UMRS_1166-ICAN, Institute of Cardiometabolism and Nutrition, Service de Médecine Intensive - Réanimation, Assistance Publique-Hôpitaux de Paris (APHP) Hôpital Pitié-Salpêtrière, Paris, France
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11
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Menga LS, Subirà C, Wong A, Sousa M, Brochard LJ. Setting positive end-expiratory pressure: does the 'best compliance' concept really work? Curr Opin Crit Care 2024; 30:20-27. [PMID: 38085857 DOI: 10.1097/mcc.0000000000001121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
PURPOSE OF REVIEW Determining the optimal positive end-expiratory pressure (PEEP) setting remains a central yet debated issue in the management of acute respiratory distress syndrome (ARDS).The 'best compliance' strategy set the PEEP to coincide with the peak respiratory system compliance (or 2 cmH 2 O higher) during a decremental PEEP trial, but evidence is conflicting. RECENT FINDINGS The physiological rationale that best compliance is always representative of functional residual capacity and recruitment has raised serious concerns about its efficacy and safety, due to its association with increased 28-day all-cause mortality in a randomized clinical trial in ARDS patients.Moreover, compliance measurement was shown to underestimate the effects of overdistension, and neglect intra-tidal recruitment, airway closure, and the interaction between lung and chest wall mechanics, especially in obese patients. In response to these concerns, alternative approaches such as recruitment-to-inflation ratio, the nitrogen wash-in/wash-out technique, and electrical impedance tomography (EIT) are gaining attention to assess recruitment and overdistention more reliably and precisely. SUMMARY The traditional 'best compliance' strategy for determining optimal PEEP settings in ARDS carries risks and overlooks some key physiological aspects. The advent of new technologies and methods presents more reliable strategies to assess recruitment and overdistention, facilitating personalized approaches to PEEP optimization.
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Affiliation(s)
- Luca S Menga
- St Michael's Hospital, Li Ka Shing Knowledge Institute, Keenan Research Centre
- University of Toronto, Interdepartmental Division of Critical Care Medicine, Toronto, Ontario, Canada
- Università Cattolica del Sacro Cuore, Facoltà di Medicina e Chirurgia, Anesthesiology and Intensive Care Medicine
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Anesthesia, Emergency and Intensive Care Medicine, Roma, Italy
| | - Carles Subirà
- St Michael's Hospital, Li Ka Shing Knowledge Institute, Keenan Research Centre
- University of Toronto, Interdepartmental Division of Critical Care Medicine, Toronto, Ontario, Canada
- Centro de Investigación Biomédica en Red de Enfermedades Respiratorias, Instituto de Salud Carlos III, Madrid
- Critical Care Department, Althaia Xarxa Assistencial Universitària de Manresa, IRIS Research Institute, Manresa, Spain
- Grup de Recerca de Malalt Crític (GMC). Institut de Recerca Biomèdica Catalunya Central IRIS-CC
| | - Alfred Wong
- St Michael's Hospital, Li Ka Shing Knowledge Institute, Keenan Research Centre
- University of Toronto, Interdepartmental Division of Critical Care Medicine, Toronto, Ontario, Canada
| | - Mayson Sousa
- St Michael's Hospital, Li Ka Shing Knowledge Institute, Keenan Research Centre
- University of Toronto, Interdepartmental Division of Critical Care Medicine, Toronto, Ontario, Canada
| | - Laurent J Brochard
- St Michael's Hospital, Li Ka Shing Knowledge Institute, Keenan Research Centre
- University of Toronto, Interdepartmental Division of Critical Care Medicine, Toronto, Ontario, Canada
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12
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Lan L, Ni Y, Zhou Y, Fu L, Wu W, Li P, Yu H, Liang G, Luo F. PEEP-Induced Lung Recruitment Maneuver Combined with Prone Position for ARDS: A Single-Center, Prospective, Randomized Clinical Trial. J Clin Med 2024; 13:853. [PMID: 38337547 PMCID: PMC10856548 DOI: 10.3390/jcm13030853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Revised: 01/28/2024] [Accepted: 01/29/2024] [Indexed: 02/12/2024] Open
Abstract
Background: Prone position (PP) and the positive end-expiratory pressure (PEEP)-induced lung recruitment maneuver (LRM) are both efficient in improving oxygenation and prognosis in patients with ARDS. The synergistic effect of PP combined with PEEP-induced LRM in patients with ARDS remains unclear. We aim to explore the effects of PP combined with PEEP-induced LRM on prognosis in patients with moderate to severe ARDS and the predicting role of lung recruitablity. Methods: Patients with moderate to severe ARDS were consecutively enrolled. The patients were prospectively assigned to either the intervention (PP with PEEP-induced LRM) or control groups (PP). The clinical outcomes, respiratory mechanics, and electric impedance tomography (EIT) monitoring results for the two groups were compared. Lung recruitablity (recruitment-to-inflation ratio: R/I) was measured during the PEEP-induced LRM procedure and was used for predicting the response to LRM. Results: Fifty-eight patients were included in the final analysis, among which 28 patients (48.2%) received PEEP-induced LRM combined with PP. PEEP-induced LRM enhanced the effect of PP by a significant improvement in oxygenation (∆PaO2/FiO2 75.8 mmHg vs. 4.75 mmHg, p < 0.001) and the compliance of respiratory system (∆Crs, 2 mL/cmH2O vs. -1 mL/cmH2O, p = 0.02) among ARDS patients. Based on the EIT measurement, PP combined with PEEP-induced LRM increased the ventilation distribution mainly in the dorsal region (5.0% vs. 2.0%, p = 0.015). The R/I ratio was measured in 28 subjects. The higher R/I ratio was related to greater oxygenation improvement after LRM (Pearson's r = 0.4; p = 0.034). Conclusions: In patients with moderate to severe ARDS, PEEP-induced LRM combined with PP can improve oxygenation and dorsal ventilation distribution. R/I can be useful to predict responses to LRM.
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Affiliation(s)
- Lan Lan
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu 610064, China; (L.L.); (Y.N.); (Y.Z.); (L.F.); (W.W.); (P.L.); (H.Y.); (G.L.)
- State Key Laboratory of Respiratory Health and Multimorbidity, West China Hospital, Sichuan University, Chengdu 610064, China
| | - Yuenan Ni
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu 610064, China; (L.L.); (Y.N.); (Y.Z.); (L.F.); (W.W.); (P.L.); (H.Y.); (G.L.)
- State Key Laboratory of Respiratory Health and Multimorbidity, West China Hospital, Sichuan University, Chengdu 610064, China
| | - Yubei Zhou
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu 610064, China; (L.L.); (Y.N.); (Y.Z.); (L.F.); (W.W.); (P.L.); (H.Y.); (G.L.)
- State Key Laboratory of Respiratory Health and Multimorbidity, West China Hospital, Sichuan University, Chengdu 610064, China
| | - Linxi Fu
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu 610064, China; (L.L.); (Y.N.); (Y.Z.); (L.F.); (W.W.); (P.L.); (H.Y.); (G.L.)
- State Key Laboratory of Respiratory Health and Multimorbidity, West China Hospital, Sichuan University, Chengdu 610064, China
| | - Wentao Wu
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu 610064, China; (L.L.); (Y.N.); (Y.Z.); (L.F.); (W.W.); (P.L.); (H.Y.); (G.L.)
- State Key Laboratory of Respiratory Health and Multimorbidity, West China Hospital, Sichuan University, Chengdu 610064, China
| | - Ping Li
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu 610064, China; (L.L.); (Y.N.); (Y.Z.); (L.F.); (W.W.); (P.L.); (H.Y.); (G.L.)
- State Key Laboratory of Respiratory Health and Multimorbidity, West China Hospital, Sichuan University, Chengdu 610064, China
| | - He Yu
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu 610064, China; (L.L.); (Y.N.); (Y.Z.); (L.F.); (W.W.); (P.L.); (H.Y.); (G.L.)
| | - Guopeng Liang
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu 610064, China; (L.L.); (Y.N.); (Y.Z.); (L.F.); (W.W.); (P.L.); (H.Y.); (G.L.)
- State Key Laboratory of Respiratory Health and Multimorbidity, West China Hospital, Sichuan University, Chengdu 610064, China
| | - Fengming Luo
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu 610064, China; (L.L.); (Y.N.); (Y.Z.); (L.F.); (W.W.); (P.L.); (H.Y.); (G.L.)
- State Key Laboratory of Respiratory Health and Multimorbidity, West China Hospital, Sichuan University, Chengdu 610064, China
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Somhorst P, Mousa A, Jonkman AH. Setting positive end-expiratory pressure: the use of esophageal pressure measurements. Curr Opin Crit Care 2024; 30:28-34. [PMID: 38062927 PMCID: PMC10763716 DOI: 10.1097/mcc.0000000000001120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
PURPOSE OF REVIEW To summarize the key concepts, physiological rationale and clinical evidence for titrating positive end-expiratory pressure (PEEP) using transpulmonary pressure ( PL ) derived from esophageal manometry, and describe considerations to facilitate bedside implementation. RECENT FINDINGS The goal of an esophageal pressure-based PEEP setting is to have sufficient PL at end-expiration to keep (part of) the lung open at the end of expiration. Although randomized studies (EPVent-1 and EPVent-2) have not yet proven a clinical benefit of this approach, a recent posthoc analysis of EPVent-2 revealed a potential benefit in patients with lower APACHE II score and when PEEP setting resulted in end-expiratory PL values close to 0 ± 2 cmH 2 O instead of higher or more negative values. Technological advances have made esophageal pressure monitoring easier to implement at the bedside, but challenges regarding obtaining reliable measurements should be acknowledged. SUMMARY Esophageal pressure monitoring has the potential to individualize the PEEP settings. Future studies are needed to evaluate the clinical benefit of such approach.
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Affiliation(s)
- Peter Somhorst
- Department of Intensive Care Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Amne Mousa
- Department of Intensive Care Medicine, Amsterdam UMC, location VUmc, Amsterdam, The Netherlands
| | - Annemijn H. Jonkman
- Department of Intensive Care Medicine, Erasmus Medical Center, Rotterdam, The Netherlands
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14
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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:S0012-3692(24)00132-6. [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] [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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15
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Pavlovsky B, Desprez C, Richard JC, Fage N, Lesimple A, Chean D, Courtais A, Mauri T, Mercat A, Beloncle F. Bedside personalized methods based on electrical impedance tomography or respiratory mechanics to set PEEP in ARDS and recruitment-to-inflation ratio: a physiologic study. Ann Intensive Care 2024; 14:1. [PMID: 38180544 PMCID: PMC10769993 DOI: 10.1186/s13613-023-01228-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 12/10/2023] [Indexed: 01/06/2024] Open
Abstract
BACKGROUND Various Positive End-Expiratory Pressure (PEEP) titration strategies have been proposed to optimize ventilation in patients with acute respiratory distress syndrome (ARDS). We aimed to compare PEEP titration strategies based on electrical impedance tomography (EIT) to methods derived from respiratory system mechanics with or without esophageal pressure measurements, in terms of PEEP levels and association with recruitability. METHODS Nineteen patients with ARDS were enrolled. Recruitability was assessed by the estimated Recruitment-to-Inflation ratio (R/Iest) between PEEP 15 and 5 cmH2O. Then, a decremental PEEP trial from PEEP 20 to 5 cmH2O was performed. PEEP levels determined by the following strategies were studied: (1) plateau pressure 28-30 cmH2O (Express), (2) minimal positive expiratory transpulmonary pressure (Positive PLe), (3) center of ventilation closest to 0.5 (CoV) and (4) intersection of the EIT-based overdistension and lung collapse curves (Crossing Point). In addition, the PEEP levels determined by the Crossing Point strategy were assessed using different PEEP ranges during the decremental PEEP trial. RESULTS Express and CoV strategies led to higher PEEP levels than the Positive PLe and Crossing Point ones (17 [14-17], 20 [17-20], 8 [5-11], 10 [8-11] respectively, p < 0.001). For each strategy, there was no significant association between the optimal PEEP level and R/Iest (Crossing Point: r2 = 0.073, p = 0.263; CoV: r2 < 0.001, p = 0.941; Express: r2 < 0.001, p = 0.920; Positive PLe: r2 = 0.037, p = 0.461). The PEEP level obtained with the Crossing Point strategy was impacted by the PEEP range used during the decremental PEEP trial. CONCLUSIONS CoV and Express strategies led to higher PEEP levels than the Crossing Point and Positive PLe strategies. Optimal PEEP levels proposed by these four methods were not associated with recruitability. Recruitability should be specifically assessed in ARDS patients to optimize PEEP titration.
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Affiliation(s)
- Bertrand Pavlovsky
- Medical Intensive Care Unit, Vent'Lab, Angers University Hospital, University of Angers, 4 Rue Larrey, 49933, Angers Cedex 9, France.
| | - Christophe Desprez
- Medical Intensive Care Unit, Vent'Lab, Angers University Hospital, University of Angers, 4 Rue Larrey, 49933, Angers Cedex 9, France
| | - Jean-Christophe Richard
- Medical Intensive Care Unit, Vent'Lab, Angers University Hospital, University of Angers, 4 Rue Larrey, 49933, Angers Cedex 9, France
| | - Nicolas Fage
- Medical Intensive Care Unit, Vent'Lab, Angers University Hospital, University of Angers, 4 Rue Larrey, 49933, Angers Cedex 9, France
| | - Arnaud Lesimple
- Medical Intensive Care Unit, Vent'Lab, Angers University Hospital, University of Angers, 4 Rue Larrey, 49933, Angers Cedex 9, France
| | - Dara Chean
- Medical Intensive Care Unit, Vent'Lab, Angers University Hospital, University of Angers, 4 Rue Larrey, 49933, Angers Cedex 9, France
| | - Antonin Courtais
- Medical Intensive Care Unit, Vent'Lab, Angers University Hospital, University of Angers, 4 Rue Larrey, 49933, Angers Cedex 9, France
| | - Tommaso Mauri
- Department of Anesthesia, Critical Care and Emergency, IRCCS (Institute for Treatment and Research, Ca' Granda Maggiore Policlinico Hospital Foundation, Milan, Italy
- Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
| | - Alain Mercat
- Medical Intensive Care Unit, Vent'Lab, Angers University Hospital, University of Angers, 4 Rue Larrey, 49933, Angers Cedex 9, France
| | - François Beloncle
- Medical Intensive Care Unit, Vent'Lab, Angers University Hospital, University of Angers, 4 Rue Larrey, 49933, Angers Cedex 9, France
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16
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Arellano DH, Brito R, Morais CCA, Ruiz-Rudolph P, Gajardo AIJ, Guiñez DV, Lazo MT, Ramirez I, Rojas VA, Cerda MA, Medel JN, Illanes V, Estuardo NR, Bruhn AR, Brochard LJ, Amato MBP, Cornejo RA. Pendelluft in hypoxemic patients resuming spontaneous breathing: proportional modes versus pressure support ventilation. Ann Intensive Care 2023; 13:131. [PMID: 38117367 PMCID: PMC10733241 DOI: 10.1186/s13613-023-01230-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 12/10/2023] [Indexed: 12/21/2023] Open
Abstract
BACKGROUND Internal redistribution of gas, referred to as pendelluft, is a new potential mechanism of effort-dependent lung injury. Neurally-adjusted ventilatory assist (NAVA) and proportional assist ventilation (PAV +) follow the patient's respiratory effort and improve synchrony compared with pressure support ventilation (PSV). Whether these modes could prevent the development of pendelluft compared with PSV is unknown. We aimed to compare pendelluft magnitude during PAV + and NAVA versus PSV in patients with resolving acute respiratory distress syndrome (ARDS). METHODS Patients received either NAVA, PAV + , or PSV in a crossover trial for 20-min using comparable assistance levels after controlled ventilation (> 72 h). We assessed pendelluft (the percentage of lost volume from the non-dependent lung region displaced to the dependent region during inspiration), drive (as the delta esophageal swing of the first 100 ms [ΔPes 100 ms]) and inspiratory effort (as the esophageal pressure-time product per minute [PTPmin]). We performed repeated measures analysis with post-hoc tests and mixed-effects models. RESULTS Twenty patients mechanically ventilated for 9 [5-14] days were monitored. Despite matching for a similar tidal volume, respiratory drive and inspiratory effort were slightly higher with NAVA and PAV + compared with PSV (ΔPes 100 ms of -2.8 [-3.8--1.9] cm H2O, -3.6 [-3.9--2.4] cm H2O and -2.1 [-2.5--1.1] cm H2O, respectively, p < 0.001 for both comparisons; PTPmin of 155 [118-209] cm H2O s/min, 197 [145-269] cm H2O s/min, and 134 [93-169] cm H2O s/min, respectively, p < 0.001 for both comparisons). Pendelluft magnitude was higher in NAVA (12 ± 7%) and PAV + (13 ± 7%) compared with PSV (8 ± 6%), p < 0.001. Pendelluft magnitude was strongly associated with respiratory drive (β = -2.771, p-value < 0.001) and inspiratory effort (β = 0.026, p < 0.001), independent of the ventilatory mode. A higher magnitude of pendelluft in proportional modes compared with PSV existed after adjusting for PTPmin (β = 2.606, p = 0.010 for NAVA, and β = 3.360, p = 0.004 for PAV +), and only for PAV + when adjusted for respiratory drive (β = 2.643, p = 0.009 for PAV +). CONCLUSIONS Pendelluft magnitude is associated with respiratory drive and inspiratory effort. Proportional modes do not prevent its occurrence in resolving ARDS compared with PSV.
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Affiliation(s)
- Daniel H Arellano
- Departamento de Medicina, Unidad de Pacientes Críticos, Hospital Clínico Universidad de Chile, Dr. Carlos Lorca Tobar 999, 8380456, Santiago, Chile
- Departamento de Kinesiología, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Roberto Brito
- Departamento de Medicina, Unidad de Pacientes Críticos, Hospital Clínico Universidad de Chile, Dr. Carlos Lorca Tobar 999, 8380456, Santiago, Chile
| | - Caio C A Morais
- Divisao de Pneumologia, Faculdade de Medicina, Instituto Do Coração, Hospital das Clinicas HCFMUSP, Universidade de São Paulo, São Paulo, Brazil
- Departamento de Fisioterapia, Universidade Federal de Pernambuco, Recife, Brazil
| | - Pablo Ruiz-Rudolph
- Programa de Epidemiología, Facultad de Medicina, Instituto de Salud Poblacional, Universidad de Chile, Santiago, Chile
| | - Abraham I J Gajardo
- Departamento de Medicina, Unidad de Pacientes Críticos, Hospital Clínico Universidad de Chile, Dr. Carlos Lorca Tobar 999, 8380456, Santiago, Chile
- Programa de Fisiopatología, Facultad de Medicina, Instituto de Ciencias Biomédicas, Universidad de Chile, Santiago, Chile
| | - Dannette V Guiñez
- Departamento de Medicina, Unidad de Pacientes Críticos, Hospital Clínico Universidad de Chile, Dr. Carlos Lorca Tobar 999, 8380456, Santiago, Chile
| | - Marioli T Lazo
- Departamento de Medicina, Unidad de Pacientes Críticos, Hospital Clínico Universidad de Chile, Dr. Carlos Lorca Tobar 999, 8380456, Santiago, Chile
| | - Ivan Ramirez
- Escuela de Kinesiología, Universidad Diego Portales, Santiago, Chile
| | - Verónica A Rojas
- Departamento de Medicina, Unidad de Pacientes Críticos, Hospital Clínico Universidad de Chile, Dr. Carlos Lorca Tobar 999, 8380456, Santiago, Chile
| | - María A Cerda
- Departamento de Medicina, Unidad de Pacientes Críticos, Hospital Clínico Universidad de Chile, Dr. Carlos Lorca Tobar 999, 8380456, Santiago, Chile
| | - Juan N Medel
- Departamento de Medicina, Unidad de Pacientes Críticos, Hospital Clínico Universidad de Chile, Dr. Carlos Lorca Tobar 999, 8380456, Santiago, Chile
| | - Victor Illanes
- Departamento de Medicina, Unidad de Pacientes Críticos, Hospital Clínico Universidad de Chile, Dr. Carlos Lorca Tobar 999, 8380456, Santiago, Chile
| | - Nivia R Estuardo
- Departamento de Medicina, Unidad de Pacientes Críticos, Hospital Clínico Universidad de Chile, Dr. Carlos Lorca Tobar 999, 8380456, Santiago, Chile
| | - Alejandro R Bruhn
- Departamento de Medicina Intensiva, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
- Center of Acute Respiratory Critical Illness (ARCI), Santiago, Chile
| | - Laurent J Brochard
- Keenan Research Centre, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, Toronto, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
| | - Marcelo B P Amato
- Divisao de Pneumologia, Faculdade de Medicina, Instituto Do Coração, Hospital das Clinicas HCFMUSP, Universidade de São Paulo, São Paulo, Brazil
| | - Rodrigo A Cornejo
- Departamento de Medicina, Unidad de Pacientes Críticos, Hospital Clínico Universidad de Chile, Dr. Carlos Lorca Tobar 999, 8380456, Santiago, Chile.
- Center of Acute Respiratory Critical Illness (ARCI), Santiago, Chile.
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17
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Winkler T, Amato MBP. Alveolar Tipping Points in Changing Lungs Related to Positive End-expiratory Pressure. Anesthesiology 2023; 139:719-721. [PMID: 37934106 DOI: 10.1097/aln.0000000000004777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Affiliation(s)
- Tilo Winkler
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
| | - Marcelo B P Amato
- INCOR - Heart Institute, Cardiopulmonary Department, Pulmonary Division, Hospital das Clínicas, University of São Paulo, São Paulo, Brazil
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18
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Nishikimi M, Ohshimo S, Hamaguchi J, Fujizuka K, Hagiwara Y, Anzai T, Ishii J, Ogata Y, Aokage T, Ikeda T, Yagi T, Suzuki G, Ishikura K, Katsuta K, Konno D, Hattori N, Nakamura T, Matsumura Y, Kasugai D, Kikuchi H, Iino T, Kai S, Hashimoto H, Yoshida T, Igarashi Y, Ogura T, Matsumura K, Shimizu K, Nakamura M, Ichiba S, Takahashi K, Shime N. High versus low positive end-expiratory pressure setting in patients receiving veno-venous extracorporeal membrane oxygenation support for severe acute respiratory distress syndrome: study protocol for the multicentre, randomised ExPress SAVER Trial. BMJ Open 2023; 13:e072680. [PMID: 37852764 PMCID: PMC10603413 DOI: 10.1136/bmjopen-2023-072680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Accepted: 08/23/2023] [Indexed: 10/20/2023] Open
Abstract
INTRODUCTION While limiting the tidal volume to 6 mL/kg during veno-venous extracorporeal membrane oxygenation (V-V ECMO) to ameliorate lung injury in patients with acute respiratory distress syndrome (ARDS) is widely accepted, the best setting for positive end-expiratory pressure (PEEP) is still controversial. This study is being conducted to investigate whether a higher PEEP setting (15 cmH2O) during V-V ECMO can decrease the duration of ECMO support needed in patients with severe ARDS, as compared with a lower PEEP setting. METHODS AND ANALYSIS The study is an investigator-initiated, multicentre, open-label, two-arm, randomised controlled trial conducted with the participation of 20 intensive care units (ICUs) at academic as well as non-academic hospitals in Japan. The subjects of the study are patients with severe ARDS who require V-V ECMO support. Eligible patients will be randomised equally to the high PEEP group or low PEEP group. Recruitment to the study will continue until a total of 210 patients with ARDS requiring V-V ECMO support have been randomised. In the high PEEP group, PEEP will be set at 15 cmH2O from the start of V-V ECMO until the trials for liberation from V-V ECMO (or until day 28 after the allocation), while in the low PEEP group, the PEEP will be set at 5 cmH2O. Other treatments will be the same in the two groups. The primary endpoint of the study is the number of ECMO-free days until day 28, defined as the length of time (in days) from successful libration from V-V ECMO to day 28. The secondary endpoints are mortality on day 28, in-hospital mortality on day 60, ventilator-free days during the first 60 days and length of ICU stay. ETHICS AND DISSEMINATION Ethics approval for the trial at all the participating hospitals was obtained on 27 September 2022, by central ethics approval (IRB at Hiroshima University Hospital, C2022-0006). The results of this study will be presented at domestic and international medical congresses, and also published in scientific journals. TRIAL REGISTRATION NUMBER The Japan Registry of Clinical Trials jRCT1062220062. Registered on 28 September 2022. PROTOCOL VERSION 28 March 2023, version 4.0.
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Affiliation(s)
- Mitsuaki Nishikimi
- Department of Emergency and Critical Care Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Shinichiro Ohshimo
- Department of Emergency and Critical Care Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Jun Hamaguchi
- Department of Critical Care and Emergency Medicine, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan
| | - Kenji Fujizuka
- Advanced Medical Emergency Department and Critical Care Center, Japan Red Cross Maebashi Hospital, Maebashi, Maebashi, UK
| | - Yoshihiro Hagiwara
- Department of Emergency Medicine and Critical Care Medicine, Saiseikai Utsunomiya Hospital, Utsunomiya, Japan
| | - Tatsuhiko Anzai
- Department of Biostatistics, M&D Data Science Center, Tokyo Medical and Dental University, Tokyo, Japan
| | - Junki Ishii
- Department of Emergency and Critical Care Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Yoshitaka Ogata
- Department of Critical Care Medicine, Yao Tokushukai General Hospital, Osaka, Japan
| | - Toshiyuki Aokage
- Department of Emergency, Critical Care and Disaster Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Tokuji Ikeda
- Department of Emergency Medicine and Critical Care Medicine, Yamanashi Prefectural Central Hospital, Kouhu, Japan
| | - Tsukasa Yagi
- Department of Cardiology, Nihon University Hospital, Tokyo, Japan
| | - Ginga Suzuki
- Emergency and Critical Care Center, Toho University Omori Medical Center, Tokyo, Japan
| | - Ken Ishikura
- Emergency and Disaster Medicine, Mie University Graduate School of Medicine, Tsu, Japan
| | - Ken Katsuta
- Department of Emergency and Critical Care, Tohoku University Hospital, Sendai, Japan
| | - Daisuke Konno
- Department of Anesthesiology and Perioperative Medicine, Tohoku University School of Medicine, Sendai, Japan
| | - Noriyuki Hattori
- Department of Emergency and Critical Care Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Tomoyuki Nakamura
- Department of Anesthesiology and Critical Care Medicine, Fujita Health University School of Medicine, Toyoake, Japan
| | - Yosuke Matsumura
- Department of Intensive Care, Chiba Emergency Medical Center, Chiba, Chiba, Japan
| | - Daisuke Kasugai
- Department of Emergency and Critical Care Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hitoshi Kikuchi
- Department of Emergency Medicine, Sagamihara Kyodo Hospital, Sagamihara, Japan
| | - Tatsuhiko Iino
- Department of Emergency Medicine, Kishiwada Tokushukai Hospital, Osaka, Japan
| | - Shinichi Kai
- Department of Anesthesia, Kyoto University School of Medicine, Kyoto, Japan
| | - Haruka Hashimoto
- Department of Anesthesia and Intensive Care Medicine, Osaka University School of Medicine, Osaka, Japan
| | - Takeshi Yoshida
- Department of Anesthesia and Intensive Care Medicine, Osaka University School of Medicine, Osaka, Japan
| | - Yumi Igarashi
- Department of Intensive Care Medicine, Showa University School of Medicine, Tokyo, Japan
| | - Takayuki Ogura
- Department of Emergency Medicine and Critical Care Medicine, Saiseikai Utsunomiya Hospital, Utsunomiya, Japan
| | - Kazuki Matsumura
- Department of Critical Care and Emergency Medicine, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan
| | - Keiki Shimizu
- Department of Critical Care and Emergency Medicine, Tokyo Metropolitan Tama Medical Center, Tokyo, Japan
| | - Mitsunobu Nakamura
- Advanced Medical Emergency Department and Critical Care Center, Japan Red Cross Maebashi Hospital, Maebashi, Maebashi, UK
| | - Shingo Ichiba
- Department of Critical Care Medicine, Tokyo Women's Medical University, Tokyo, Japan
| | - Kunihiko Takahashi
- Department of Biostatistics, M&D Data Science Center, Tokyo Medical and Dental University, Tokyo, Japan
| | - Nobuaki Shime
- Department of Emergency and Critical Care Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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19
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Le Stang V, Dres M. Increasing Positive End-Expiratory Pressure to Recruit the Lungs: Take into Account Heart-Lung Interaction and Oxygen Delivery. Am J Respir Crit Care Med 2023; 208:637-638. [PMID: 37490049 PMCID: PMC10492242 DOI: 10.1164/rccm.202305-0891le] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 06/29/2023] [Indexed: 07/26/2023] Open
Affiliation(s)
- Valentine Le Stang
- Sorbonne Université, Institut national de la santé et de la recherche médicale, UMRS1158 Neurophysiologie respiratoire expérimentale et clinique, Paris, France; and
- Service de Médecine Intensive – Réanimation (Département “R3S”), Assistance Publique–Hôpitaux de Paris, Sorbonne Université, Hôpital Pitié-Salpêtrière, Paris, France
| | - Martin Dres
- Sorbonne Université, Institut national de la santé et de la recherche médicale, UMRS1158 Neurophysiologie respiratoire expérimentale et clinique, Paris, France; and
- Service de Médecine Intensive – Réanimation (Département “R3S”), Assistance Publique–Hôpitaux de Paris, Sorbonne Université, Hôpital Pitié-Salpêtrière, Paris, France
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20
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Jimenez JV, Hyzy RC. Electrical Impedance Tomography and Optimal Positive End-Expiratory Pressure: Uncovering Latent Heterogeneity of Treatment Effect. Am J Respir Crit Care Med 2023; 208:636-637. [PMID: 37387585 PMCID: PMC10492253 DOI: 10.1164/rccm.202305-0878le] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 06/29/2023] [Indexed: 07/01/2023] Open
Affiliation(s)
- Jose Victor Jimenez
- Department of Internal Medicine, Yale New Haven Hospital, New Haven, Connecticut; and
| | - Robert C. Hyzy
- Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, Michigan
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21
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Jonkman A, Brochard L. Reply to Jimenez and Hyzy and to Le Stang and Dres. Am J Respir Crit Care Med 2023; 208:638-639. [PMID: 37387595 PMCID: PMC10492257 DOI: 10.1164/rccm.202306-0987le] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 06/29/2023] [Indexed: 07/01/2023] Open
Affiliation(s)
- Annemijn Jonkman
- Department of Intensive Care Medicine, Erasmus Medical Center, Rotterdam, the Netherlands
- Keenan Research Centre, Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Unity Health Toronto, Toronto, Canada; and
| | - Laurent Brochard
- Keenan Research Centre, Li Ka Shing Knowledge Institute, St. Michael’s Hospital, Unity Health Toronto, Toronto, Canada; and
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada
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22
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Motes A, Singh T, Vinan Vega N, Nugent K. A Focused Review of the Initial Management of Patients with Acute Respiratory Distress Syndrome. J Clin Med 2023; 12:4650. [PMID: 37510765 PMCID: PMC10380732 DOI: 10.3390/jcm12144650] [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: 05/05/2023] [Revised: 06/24/2023] [Accepted: 07/04/2023] [Indexed: 07/30/2023] Open
Abstract
At present, the management of patients with acute respiratory distress syndrome (ARDS) largely focuses on ventilator settings to limit intrathoracic pressures by using low tidal volumes and on FiO2/PEEP relationships to maintain optimal gas exchange. Acute respiratory distress syndrome is a complex medical disorder that can develop in several primary acute disorders, has a rapid time course, and has several classifications that can reflect either the degree of hypoxemia, the extent of radiographic involvement, or the underlying pathogenesis. The identification of subtypes of patients with ARDS would potentially make precision medicine possible in these patients. This is a very difficult challenge given the heterogeneity in the clinical presentation, pathogenesis, and treatment responses in these patients. The analysis of large databases of patients with acute respiratory failure using statistical methods such as cluster analysis could identify phenotypes that have different outcomes or treatment strategies. However, clinical information available on presentation is unlikely to separate patients into groups that allow for secure treatment decisions or outcome predictions. In some patients, non-invasive positive pressure ventilation provides adequate support through episodes of acute respiratory failure, and the development of specialized units to manage patients with this support might lead to the better use of hospital resources. Patients with ARDS have capillary leak, which results in interstitial and alveolar edema. Early attention to fluid balance in these patients might improve gas exchange and alter the pathophysiology underlying the development of severe ARDS. Finally, more attention to the interaction of patients with ventilators through complex monitoring systems has the potential to identify ventilator dyssynchrony, leading to ventilator adjustments and potentially better outcomes. Recent studies with COVID-19 patients provide tentative answers to some of these questions. In addition, expert clinical investigators have analyzed the promise and difficulties associated with the development of precision medicine in patients with ARDS.
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Affiliation(s)
- Arunee Motes
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Tushi Singh
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Noella Vinan Vega
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Kenneth Nugent
- Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
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