Observational studyBritish journal of anaesthesia2021
Prone positioning for patients intubated for severe acute respiratory distress syndrome (ARDS) secondary to COVID-19: a retrospective observational cohort study.
Observational study in British journal of anaesthesia, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 60 papers, 9 of them syntheses that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
A Prospective Clinical Study to Explore the Mechanism of Patients' Response to Prone Positioning in ARDS Patients, Including COVID-19
Use of Lung Ultrasound in Evaluating Physiological Response to Awake Self Proning
Who cites it
60 citing papers in PubMed, 9 syntheses or guidelines pooled it, 142 citations in OpenAlex.
- Definition and prognostic value of response to prone positioning in ARDS: a systematic review and meta-analysis.Critical care (London, England) · 2026Pooled it
- Awake prone positioning for non-intubated patients with COVID-19-related acute hypoxic respiratory failure: a systematic review based on eight high-quality randomized controlled trials.BMC infectious diseases · 2023Pooled it
- Effects of awake prone position vs. usual care on acute hypoxemic respiratory failure in patients with COVID-19: A systematic review and meta-analysis of randomized controlled trials.Frontiers in medicine · 2023Pooled it
- Efficacy and safety of prone position in COVID-19 patients with respiratory failure: a systematic review and meta-analysis.European journal of medical research · 2022Pooled it
- Respiratory system mechanics, gas exchange, and outcomes in mechanically ventilated patients with COVID-19-related acute respiratory distress syndrome: a systematic review and meta-analysis.The Lancet. Respiratory medicine · 2022Pooled it
- Effect of prone versus supine position in COVID-19 patients: A systematic review and meta-analysis.Journal of clinical anesthesia · 2021Pooled it
- Effect of prone position on respiratory parameters, intubation and death rate in COVID-19 patients: systematic review and meta-analysis.Scientific reports · 2021Pooled it
- Prone ventilation in intubated COVID-19 patients: a systematic review and meta-analysis.Brazilian journal of anesthesiology (Elsevier)Pooled it
- Prone Positioning in Patients With COVID-19: Analysis of Multicenter Registry Data and Meta-analysis of Aggregate Data.In vivo (Athens, Greece)Pooled it
- Factors for success of awake prone positioning in patients with COVID-19-induced acute hypoxemic respiratory failure: analysis of a randomized controlled trial.Critical care (London, England) · 2022Trial
- Article
- Acute Respiratory Distress Syndrome: Mechanical Ventilation vs. High-Frequency Percussive Ventilation.Canadian respiratory journal · 2026Article
- Modified Versus Conventional Prone Position for COVID-19 Patients in Adult Intensive Care Units: A Comparative Study.Nursing in critical care · 2025Article
- The effects of different prone ventilation strategies on mechanical power and respiratory mechanics in acute respiratory distress syndrome patients: a prospective, single-center observational study.Journal of thoracic disease · 2025Article
- Article
- Assessing the Impact of the Prone Position on Acute Kidney Injury.Journal of clinical medicine · 2025Article
- A Nomogram for Predicting Pulmonary Complications Following Laparoscopic Surgery in Elderly Patients After the COVID-19 Pandemic.Clinical interventions in aging · 2025Article
- Influence of Prone Position on the Survival of COVID-19 Patients Undergoing Invasive Mechanical Ventilation: A Propensity Score Matching Study.International journal of general medicine · 2025Article
- Respiratory effects of prone position in COVID-19 acute respiratory distress syndrome differ according to the recruitment-to-inflation ratio: a prospective observational study.Annals of intensive care · 2024Article
- Plumbagin ameliorates LPS-induced acute lung injury by regulating PI3K/AKT/mTOR and Keap1-Nrf2/HO-1 signalling pathways.Journal of cellular and molecular medicine · 2024Article
Corrections and comments
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Authors and funding
10 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe role of repeated prone positioning in intubated subjects with acute respiratory distress syndrome caused by COVID-19 remains unclear.
methodsWe conducted a retrospective observational cohort study of critically ill intubated patients with COVID-19 who were placed in the prone position between March 18, 2020 and March 31, 2020. Exclusion criteria were pregnancy, reintubation, and previous prone positioning at a referring hospital. Patients were followed up until hospital discharge. The primary outcome was oxygenation assessed by partial pressure of oxygen/fraction of inspired oxygen ratio (Pao
resultsForty-two subjects (29 males; age: 59 [52-69] yr) were eligible for analysis. Nine subjects were placed in the prone position only once, with 25 requiring prone positioning on three or more occasions. A total of 31/42 (74%) subjects survived to discharge, with five requiring ECMO; 11/42 (26%) subjects died. After the first prone positioning session, Pao
conclusionPatients with COVID-19 acute respiratory distress syndrome frequently responded to initial prone positioning with improved oxygenation. Subsequent prone positioning in subjects discharged from hospital was associated with greater improvements in oxygenation.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.