Neuroanesthesia & neurocritical care

Association of Cerebral Oxygenation During Prehospital Anaesthesia and Functional Outcome: A Prospective, Observational Multi‐Centre Cohort Study of 1014 Patients

Acta Anaesthesiol ScandPublished Prospective observational cohort study

Main finding · Favourable functional outcome (mRS ≤ 2), aCDE vs no aCDEResult — go to the resultAdjusted odds ratio 0.92 95% CI 0.62–1.34

Authors' conclusion

An rCDE was not associated with worse functional outcomes. While aCDEs were linked to unfavourable outcomes in unadjusted analyses, these associations were not significant after adjustment, highlighting the complexity of interpreting NIRS in heterogeneous populations.

Study context

Population
Adults anaesthetised by six prehospital critical care teams, monitored with near-infrared spectroscopy (NIRS)
Participants
1,014 adults
Exposure
Cerebral desaturation events vs none during prehospital anaesthesia
  • Relative cerebral desaturation event (rCDE)n = 199
  • Absolute cerebral desaturation event (aCDE)n = 182
Outcome
Favourable functional outcome (modified Rankin Scale ≤ 2)
Follow-up
30 days
Methodological detailsmulticentre
  • Multicentre

Main finding

As reported in the abstract

Favourable functional outcome (mRS ≤ 2), aCDE vs no aCDE

Adjusted odds ratio

0.92

95% CI 0.62–1.34

P = 0.14

Cerebral desaturation events (rCDE, aCDE) vs none during prehospital anaesthesia
adjusted OR 0.92 (95% CI 0.62–1.34); P = 0.14

Observational data: associations, not effects.

Secondary outcomes

OutcomeP value
30-day survival, aCDE vs no aCDE · 46% vs. 58% · adjusted analyses showed no significant associationsP = 0.006
Favourable functional outcome, aCDE vs no aCDE · 1 year31% vs. 41% · adjusted analyses showed no significant associationsP = 0.043
Supraphysiological baseline among rCDE
63% · 125 of 199

Original publication

Association of Cerebral Oxygenation During Prehospital Anaesthesia and Functional Outcome: A Prospective, Observational Multi‐Centre Cohort Study of 1014 Patients. Acta Anaesthesiol Scand. Published 8 December 2025. doi:10.1111/aas.70161

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