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Hohmann F, Wedekind L, Grundeis F, Dickel S, Frank J, Golinski M, Griesel M, Grimm C, Herchenhahn C, Kramer A, Metzendorf MI, Moerer O, Olbrich N, Thieme V, Vieler A, Fichtner F, Burns J, Laudi S. Early spontaneous breathing for acute respiratory distress syndrome in individuals with COVID-19. Cochrane Database Syst Rev 2022; 6:CD015077. [PMID: 35767435 PMCID: PMC9242537 DOI: 10.1002/14651858.cd015077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND Acute respiratory distress syndrome (ARDS) represents the most severe course of COVID-19 (caused by the SARS-CoV-2 virus), usually resulting in a prolonged stay in an intensive care unit (ICU) and high mortality rates. Despite the fact that most affected individuals need invasive mechanical ventilation (IMV), evidence on specific ventilation strategies for ARDS caused by COVID-19 is scarce. Spontaneous breathing during IMV is part of a therapeutic concept comprising light levels of sedation and the avoidance of neuromuscular blocking agents (NMBA). This approach is potentially associated with both advantages (e.g. a preserved diaphragmatic motility and an optimised ventilation-perfusion ratio of the ventilated lung), as well as risks (e.g. a higher rate of ventilator-induced lung injury or a worsening of pulmonary oedema due to increases in transpulmonary pressure). As a consequence, spontaneous breathing in people with COVID-19-ARDS who are receiving IMV is subject to an ongoing debate amongst intensivists. OBJECTIVES To assess the benefits and harms of early spontaneous breathing activity in invasively ventilated people with COVID-19 with ARDS compared to ventilation strategies that avoid spontaneous breathing. SEARCH METHODS We searched the Cochrane COVID-19 Study Register (which includes CENTRAL, PubMed, Embase, Clinical Trials.gov WHO ICTRP, and medRxiv) and the WHO COVID-19 Global literature on coronavirus disease to identify completed and ongoing studies from their inception to 2 March 2022. SELECTION CRITERIA Eligible study designs comprised randomised controlled trials (RCTs) that evaluated spontaneous breathing in participants with COVID-19-related ARDS compared to ventilation strategies that avoided spontaneous breathing (e.g. using NMBA or deep sedation levels). Additionally, we considered controlled before-after studies, interrupted time series with comparison group, prospective cohort studies and retrospective cohort studies. For these non-RCT studies, we considered a minimum total number of 50 participants to be compared as necessary for inclusion. Prioritised outcomes were all-cause mortality, clinical improvement or worsening, quality of life, rate of (serious) adverse events and rate of pneumothorax. Additional outcomes were need for tracheostomy, duration of ICU length of stay and duration of hospitalisation. DATA COLLECTION AND ANALYSIS We followed the methods outlined in the Cochrane Handbook for Systematic Reviews of Interventions. Two review authors independently screened all studies at the title/abstract and full-text screening stage. We also planned to conduct data extraction and risk of bias assessment in duplicate. We planned to conduct meta-analysis for each prioritised outcome, as well as subgroup analyses of mortality regarding severity of oxygenation impairment and duration of ARDS. In addition, we planned to perform sensitivity analyses for studies at high risk of bias, studies using NMBA in addition to deep sedation level to avoid spontaneous breathing and a comparison of preprints versus peer-reviewed articles. We planned to assess the certainty of evidence using the GRADE approach. MAIN RESULTS We identified no eligible studies for this review. AUTHORS' CONCLUSIONS We found no direct evidence on whether early spontaneous breathing in SARS-CoV-2-induced ARDS is beneficial or detrimental to this particular group of patients. RCTs comparing early spontaneous breathing with ventilatory strategies not allowing for spontaneous breathing in SARS-CoV-2-induced ARDS are necessary to determine its value within the treatment of severely ill people with COVID-19. Additionally, studies should aim to clarify whether treatment effects differ between people with SARS-CoV-2-induced ARDS and people with non-SARS-CoV-2-induced ARDS.
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Affiliation(s)
- Friedrich Hohmann
- Department of Anaesthesiology and Intensive Care, University of Leipzig Medical Center, Leipzig, Germany
| | - Lisa Wedekind
- Department of Anaesthesiology and Intensive Care, University of Leipzig Medical Center, Leipzig, Germany
- Institute of Medical Statistics, Computer and Data Sciences, University Hospital Jena, Jena, Germany
| | - Felicitas Grundeis
- Department of Anaesthesiology and Intensive Care, University of Leipzig Medical Center, Leipzig, Germany
| | - Steffen Dickel
- Department of Anesthesiology and Intensive Care Medicine, University Medical Center Goettingen, Goettingen, Germany
| | - Johannes Frank
- Department of Anaesthesiology and Intensive Care, University of Leipzig Medical Center, Leipzig, Germany
| | - Martin Golinski
- Department of Anesthesiology and Intensive Care Medicine, University Medical Center Goettingen, Goettingen, Germany
| | - Mirko Griesel
- Department of Anaesthesiology and Intensive Care, University of Leipzig Medical Center, Leipzig, Germany
| | - Clemens Grimm
- Department of Anesthesiology and Intensive Care Medicine, University Medical Center Goettingen, Goettingen, Germany
| | - Cindy Herchenhahn
- Department of Anaesthesiology and Intensive Care, University of Leipzig Medical Center, Leipzig, Germany
| | - Andre Kramer
- Department of Anaesthesiology and Intensive Care, University of Leipzig Medical Center, Leipzig, Germany
| | - Maria-Inti Metzendorf
- Institute of General Practice, Medical Faculty of the Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Onnen Moerer
- Department of Anesthesiology and Intensive Care Medicine, University Medical Center Goettingen, Goettingen, Germany
| | - Nancy Olbrich
- Department of Anaesthesiology and Intensive Care, University of Leipzig Medical Center, Leipzig, Germany
| | - Volker Thieme
- Department of Anaesthesiology and Intensive Care, University of Leipzig Medical Center, Leipzig, Germany
| | - Astrid Vieler
- Medicine and Sciences Library, Leipzig University, Leipzig, Germany
| | - Falk Fichtner
- Department of Anaesthesiology and Intensive Care, University of Leipzig Medical Center, Leipzig, Germany
| | - Jacob Burns
- Institute for Medical Information Processing, Biometry and Epidemiology (IBE), Chair of Public Health and Health Services Research, LMU Munich, Munich, Germany
| | - Sven Laudi
- Department of Anaesthesiology and Intensive Care, University of Leipzig Medical Center, Leipzig, Germany
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