• Natalie Kruit, Nivedita Rattan, David Tian, Stefan Dieleman, Aidan Burrell, and Mark Dennis.
• Department of Anaesthesia, Westmead Hospital, Westmead, New South Wales, Australia; Royal Prince Alfred Hospitals, Sydney, New South Wales, Australia; Greater Sydney Helicopter Emergency Service, Sydney, New South Wales, Australia; Department of Anaesthesia and Perioperative Medicine, Westmead Hospital, Westmead, New South Wales, Australia. Electronic address: natalie.kruit@health.nsw.gov.au.
• J. Cardiothorac. Vasc. Anesth. 2023 May 1; 37 (5): 748754748-754.

ObjectivesTo evaluate the available published evidence of the effects of extracorporeal cardiopulmonary resuscitation (ECPR) in the prehospital setting on clinical outcomes in patients with out-of-hospital cardiac arrest.DesignA systematic review and meta-analysis designed according to the Preferred Reporting Items for Systematic Reviews an Meta-Analyses guidelines.SettingIn the prehospital setting.ParticipantsAll randomized control trials (RCTs) and observational trials using pre-hospital ECPR in adult patients (>17 years).InterventionsPrehospital ECPR.Measurements And Main ResultsThe study authors searched Medline, Embase, and PUBMED for all RCTs and observational trials. The studies were assessed for clinical, methodologic, and statistical heterogeneity. The primary outcome was survival at hospital discharge. The study outcomes were aggregated using random-effects meta-analysis of means or proportions as appropriate. The Grading of Recommendations Assessment, Development and Evaluation methodology was used to assess the quality of evidence. Four studies were included, with a total of 222 patients receiving prehospital ECPR (mean age = 51 years [95% CI 44-57], 81% of patients were male (CI 74-87), and 60% patients had a cardiac cause for their arrest (95% CI 43-76). Overall survival at discharge was 23.4% (95% CI 15.5-33.7; I2 = 62%). The pooled low-flow time was 61.1 minutes (95% CI 45.2-77.0; I2 = 97%). The quality of evidence was assessed to be low, and the overall risk of bias was assessed to be serious, with confounding being the primary source of bias.ConclusionNo definitive conclusions can be made as to the efficacy of prehospital ECPR in refractory cardiac arrest. Higher quality evidence is required.Copyright © 2022 Elsevier Inc. All rights reserved.

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