Evidence map›Paper›PMID 35672497›Full record

ArticleNeurocritical care2022

Hyperoxia is Dose-Dependently Associated with an Increase of Unfavorable Outcomes in Ventilated Patients with Aneurysmal Subarachnoid Hemorrhage: A Retrospective Cohort Study.

Jörn Grensemann, Marius Marc-Daniel Mader, Manfred Westphal, Stefan Kluge, Patrick Czorlich

Open access · hybridAbstract read
In one paragraph

Article in Neurocritical care, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 1 pooled it
2.5field-weighted citation impact, top 9% of its field
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

12 citing papers in PubMed, 1 synthesis or guideline pooled it, 20 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Oxygen Therapy for Intracranial Hemorrhage.CNS neuroscience & therapeutics · 2026
    Review
  4. Article
  5. Article
  6. Article
  7. Observational
  8. Article
  9. Article
  10. Article
  11. Article
  12. Medical journal, Armed Forces India
    Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 1 institution in 2 countries.

Jörn GrensemannDepartment of Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany. j.grensemann@uke.de.ORCID http://orcid.org/0000-0002-3341-669X
Marius Marc-Daniel MaderDepartment of Neurosurgery, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany.
Manfred WestphalDepartment of Neurosurgery, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany.
Stefan KlugeDepartment of Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany.
Patrick CzorlichDepartment of Neurosurgery, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany.
Universität Hamburg · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAdequate oxygenation in patients with aneurysmal subarachnoid hemorrhage (SAH) is imperative. However, hyperoxia increases formation of reactive oxygen species and may be associated with a dose-dependent toxicity. We postulated a threshold for arterial partial pressure of oxygen (paO

methodsIn this retrospective single-center cohort study, patients with SAH and mechanical ventilation > 72 h were included. Oxygen integrals were calculated above the following thresholds: 80, 100, 120, and 150 mm Hg and time-weighted mean paO

resultsFrom November 2010 to February 2021, 282 of 549 patients fulfilled the inclusion criteria. Odds ratios for 30-day mortality increased dose dependently and were as follows: 1.07 (95% confidence interval [CI] 1.03-1.11; p = 0.001) for each 1 mm Hg per day above 80 mm Hg; 1.16 (95% CI 1.07-1.27), above 100 mm Hg; 1.36 (95% CI 1.15-1.61), above 120 mm Hg; and 1.59 (95% CI 1.22-2.08), above 150 mm Hg (all p < 0.001) at day 14. For favorable outcome at 3 months, odds ratios were 0.96 (95% CI 0.92-0.99) for each 1 mm Hg per day above 80 mm Hg; 0.90 (95% CI 0.84-0.98), above 100 mm Hg; 0.83 (95% CI 0.72-0.97), above 120 mm Hg; and 0.77 (95% CI 0.61-0.97), above 150 mm Hg (all p < 0.05). For time-weighted mean paO

conclusionsIntegrals above the defined paO

Indexed as

Brain IschemiaHyperoxiaSubarachnoid HemorrhageCerebral InfarctionCohort StudiesHumansOxygenProspective StudiesReactive Oxygen SpeciesRespiration, ArtificialRetrospective StudiesTreatment OutcomeOxygenReactive Oxygen SpeciesHyperoxemiaHyperoxiaMechanical ventilationMortalityOutcomeOxygenSubarachnoid hemorrhage

Identifiers

PMID35672497
PMCPMC9519732
OpenAlexW4281630281

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.