Anesthetic drugs & techniques

Depth of anaesthesia and mortality after cardiac or noncardiac surgery: a systematic review and meta-analysis of randomised controlled trials

Br J AnaesthPublished Systematic review and meta-analysis of randomised controlled trials

Pooled result · Mortality, all studies pooledResult — go to the resultOdds ratio 0.99 95% CI 0.92–1.08

Authors' conclusion

pEEG-guided lighter anaesthesia does not appear to reduce the risk of postoperative mortality.

Study context

Population
Adults aged ≥18 yr undergoing cardiac or noncardiac surgery in RCTs of processed electroencephalography (pEEG) monitoring
Participants
48,827 adults · 12 RCTs
Comparison
pEEG-guided light vs deep anaesthesia
Outcome
Mortality (30 days, 90 days and/or 1 yr or longer)
Methodological detailsPRISMA
  • PRISMA

Pooled result

Mortality, all studies pooled

Odds ratio

0.99

95% CI 0.92–1.08

Light anaesthesia vs Deep anaesthesia
OR 0.99 (95% CI 0.92–1.08)

As reported in the abstract

Further pooled results

OutcomeOR (95% CI)
Mortality, pEEG monitoring vs usual care1.02 (0.89–1.18)
Mortality, higher vs lower pEEG index targets0.89 (0.60–1.32)
Mortality, low pEEG index value alerts vs no alerts1.02 (0.41–2.52)

Mortality at 30 days, 90 days, 1 yr or longer

Result did not change significantly

Original publication

Depth of anaesthesia and mortality after cardiac or noncardiac surgery: a systematic review and meta-analysis of randomised controlled trials. Br J Anaesth. Published 7 October 2022. doi:10.1016/j.bja.2022.08.034

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