Acute cardiac care & resuscitation

Association Between Early Hyperoxia Exposure After Resuscitation From Cardiac Arrest and Neurological Disability: Prospective Multicenter Protocol-Directed Cohort Study

CirculationPublished Prospective cohort study

Authors' conclusion

Early hyperoxia exposure after resuscitation from cardiac arrest was independently associated with poor neurological function at hospital discharge.

Study context

Population
Adults after cardiac arrest, mechanically ventilated, receiving targeted temperature management after ROSC; trauma or sepsis causes excluded
Participants
280 adults
Exposure
Early hyperoxia vs no hyperoxia after resuscitation
  • Hyperoxian = 105
Outcome
Poor neurological function (modified Rankin Scale score >3)
Follow-up
Hospital discharge
Methodological detailsmulticentre
  • Multicentre

Main finding

As reported in the abstract

Hyperoxia vs No hyperoxiaAbsolute risk difference (95% CI)
Hyperoxia
12%(1–23)
Hyperoxia vs No hyperoxiaRelative risk (95% CI)
Independently associated (multivariable)
1.23(1.11–1.35)

Observational data: associations, not effects.

Further findings

OutcomeRR (95% CI)
Poor neurological outcome per 1-hour-longer hyperoxia exposurePer 1-hour-longer duration; multivariable1.03 (1.02–1.05)

Poor neurological outcome by alternative PaO2 cut points

Association with poor neurological outcome began at ≥300 mm Hg

Original publication

Association Between Early Hyperoxia Exposure After Resuscitation From Cardiac Arrest and Neurological Disability: Prospective Multicenter Protocol-Directed Cohort Study. Circulation. Published 1 February 2018. doi:10.1161/circulationaha.117.032054

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