Hemodynamics, fluids & transfusion

Methylene Blue Reduces Mortality in Critically Ill and Perioperative Patients: A Meta-Analysis of Randomized Trials

J Cardiothorac Vasc AnesthPublished Systematic review and meta-analysis of randomised trials

Pooled result · MortalityResult — go to the resultRelative risk 0.60 95% CI 0.43–0.84

Authors' conclusion

This meta-analysis showed that MB reverses vasodilation in critically ill and perioperative patients and might improve survival.

Study context

Population
Critically ill and perioperative patients
Participants
556 participants · 11 RCTs
Comparison
Methylene blue vs control
Outcome
Mortality at the longest follow-up
Follow-up
Longest

Pooled result

Mortality

Relative risk

0.60

95% CI 0.43–0.84

P = 0.003

MB vs Control
RR 0.60 (95% CI 0.43–0.84); P = 0.003

As reported in the abstract

Further pooled results

OutcomeMD (days) (95% CI)P value
ICU LOSMB vs Control−0.9 (−1.06 to −0.77)P < 0.001
Hospital LOSMB vs Control−2.2 (−2.68 to −1.70)P < 0.001
OutcomeMD (mmHg) (95% CI)P value
MAPMB vs Control8.4 (5.01–11.75)P < 0.001
OutcomeMD (dyn/s/cm5) (95% CI)P value
Systemic vascular resistanceMB vs Control94.5 (17.73–171.15)P = 0.02
OutcomeSMD (95% CI)P value
COMB vs Control0.16 (−0.25 to 0.57)P = 0.45

Mortality, septic shock and cardiac surgery subgroups (subgroup)

Lower mortality with methylene blue (MB) confirmed in septic shock and cardiac surgery subgroups

Original publication

Methylene Blue Reduces Mortality in Critically Ill and Perioperative Patients: A Meta-Analysis of Randomized Trials. J Cardiothorac Vasc Anesth. Published 1 October 2023. doi:10.1053/j.jvca.2023.09.037

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