Cardiothoracic & vascular anesthesia

Effect of peri‐operative pharmacological interventions on postoperative delirium in patients having cardiac surgery: a systematic review and Bayesian network meta‐analysis

AnaesthesiaPublished Systematic review and Bayesian network meta-analysis of randomised controlled trials

Pooled result · Postoperative deliriumResult — go to the resultRelative risk 0.31 95% CrI 0.13–0.69

Authors' conclusion

We identified dexmedetomidine with melatonin as the most effective pharmacological strategy for preventing postoperative delirium following cardiac surgery.

Study context

Population
Patients having cardiac surgery
Participants
24,827 patients · 79 RCTs
Comparison
29 peri-operative pharmacological interventions vs placebo
Outcome
Incidence of postoperative delirium
Methodological detailsSUCRA ranking, GRADE assessment, sensitivity analyses
  • SUCRA ranking
  • GRADE assessment
  • Sensitivity analyses

Pooled result

Postoperative delirium

Relative risk

0.31

95% CrI 0.13–0.69

Dexmedetomidine + melatonin vs Placebo
RR 0.31 (95% CrI 0.13–0.69)

As reported in the abstract

Further pooled results

OutcomeMD (days) (95% CrI)
ICU stayCrI; reported as significantly decreased2.4 (−3.50-1.10)
Hospital stayCrI; significantly decreased1.32 (−2.09 to −0.57)
  • ICU stay: 95%CrI
  • Hospital stay: 95%CrI

Other interventions (incl. ketamine, risperidone)

Potential efficacy but low or very low certainty of evidence

Original publication

Effect of peri‐operative pharmacological interventions on postoperative delirium in patients having cardiac surgery: a systematic review and Bayesian network meta‐analysis. Anaesthesia. Published 1 September 2025. doi:10.1111/anae.16757

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