Evidence map›Paper›PMID 35294565›Full record

SynthesisIntensive care medicine2022

The role of acute hypercapnia on mortality and short-term physiology in patients mechanically ventilated for ARDS: a systematic review and meta-analysis.

Ségolène Gendreau, Guillaume Geri, Tai Pham, Antoine Vieillard-Baron, Armand Mekontso Dessap

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Intensive care medicine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
41citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

41 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  7. PaCOJournal of clinical medicine · 2026
    Review
  8. Minimally invasive extracorporeal COCritical care (London, England) · 2026
    Observational
  9. Article
  10. The ribosomal landscape in influenza A virus infection: from molecular mechanisms to clinical relevance.European respiratory review : an official journal of the European Respiratory Society · 2026
    Review
  11. PaCOFrontiers in medicine · 2026
    Review
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors.

Ségolène GendreauAP-HP, Hôpitaux Universitaires Henri-Mondor, Service de Médecine Intensive-Réanimation, 94010, Créteil, France.ORCID 0000-0002-8223-4411
Guillaume GeriAP-HP, Hôpital Universitaire Ambroise-Paré, Service de Médecine Intensive Réanimation, 92100, Boulogne-Billancourt, France.ORCID 0000-0002-7691-6635
Tai PhamAP-HP, Hôpital de Bicêtre, DMU CORREVE, Service de Médecine Intensive-Réanimation, Université Paris-Saclay, Inserm UMR S_999, FHU SEPSIS, Groupe de Recherche Clinique CARMAS, Le Kremlin-Bicêtre, France.ORCID 0000-0002-4373-0711
Antoine Vieillard-BaronAP-HP, Hôpital Universitaire Ambroise-Paré, Service de Médecine Intensive Réanimation, 92100, Boulogne-Billancourt, France.ORCID 0000-0002-4179-3583
Armand Mekontso DessapAP-HP, Hôpitaux Universitaires Henri-Mondor, Service de Médecine Intensive-Réanimation, 94010, Créteil, France. armand.dessap@aphp.fr.ORCID 0000-0001-5961-5577

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeHypercapnia is frequent during mechanical ventilation for acute respiratory distress syndrome (ARDS), but its effects on morbidity and mortality are still controversial. We conducted a systematic review and meta-analysis to explore clinical consequences of acute hypercapnia in adult patients ventilated for ARDS.

methodsWe searched Medline, Embase, and the Cochrane Library via the OVID platform for studies published from 1946 to 2021. "Permissive hypercapnia" defined hypercapnia in studies where the group with hypercapnia was ventilated with a protective ventilation (PV) strategy (lower V

resultsTwenty-nine studies (10,101 patients) were included. Permissive hypercapnia, imposed hypercapnia under PV, and imposed hypercapnia under NPV were reported in 8, 21 and 1 study, respectively. Studies testing permissive hypercapnia reported lower mortality in hypercapnic patients receiving PV as compared to non-hypercapnic patients receiving NPV: OR = 0.26, 95% CI [0.07-0.89]. By contrast, studies reporting imposed hypercapnia under PV reported increased mortality in hypercapnic patients receiving PV as compared to non-hypercapnic patients also receiving PV: OR = 1.54, 95% CI [1.15-2.07]. There was a significant interaction between the mechanism of hypercapnia and the effect on mortality.

conclusionsClinical effects of hypercapnia are conflicting depending on its mechanism. Permissive hypercapnia was associated with improved mortality contrary to imposed hypercapnia under PV, suggesting a major role of PV strategy on the outcome.

Indexed as

HypercapniaRespiratory Distress SyndromeAdultHumansRespirationRespiration, ArtificialARDSHemodynamicsHypercapnia

Identifiers

PMID35294565
PMCPMC8924945

What OpenQuestion holds

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Registered trials

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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.