• Masato Yasuda, Shunsuke Amagasa, Masahiro Kashiura, Hideto Yasuda, and Satoko Uematsu.
• Department of Emergency and Transport Medicine, National Center for Child Health and Development, Setagaya-ku, Tokyo, Japan masato_yasuda@sk00106.achmc.pref.aichi.jp.
• Emerg Med J. 2024 Nov 21; 41 (12): 742748742-748.

BackgroundBecause of their young age and lack of known comorbidities, paediatric patients with out-of-hospital cardiac arrest (OHCA) often undergo prolonged cardiopulmonary resuscitation (CPR). We aimed to determine the association between prehospital and in-hospital CPR duration and neurological outcomes.MethodsWe conducted a retrospective analysis of data from the Japanese Association for Acute Medicine-OHCA Registry for patients <18 years of age with OHCA between June 2014 and December 2019. All patients received prehospital CPR by emergency medical service (EMS). The aetiologies of arrest included traumatic and atraumatic causes. The primary outcome measure was a 1-month neurological outcome of moderate disability or better (Pediatric Cerebral Performance Category 1-3). We calculated the dynamic probability and cumulative proportion of 1-month moderate disability or better neurological outcomes. Dynamic probability calculates patient outcomes during CPR per min. We performed multivariate logistic regression analysis to explore the association between longer CPR duration (as an ordinal variable) and 1-month poorer neurological outcomes.ResultsAmong 1007 eligible children, 252 achieved return of spontaneous circulation and 53 had a 1-month moderate disability or better neurological outcome. The dynamic probability of a 1-month moderate disability or better neurological outcome dropped below 0.01 at 64 min (0.005, 95% CI 0.001 to 0.017). The cumulative proportion of a 1-month moderate disability or better neurological outcome exceeded 0.99 at 68 min (1, 95% CI 1 to 1). With increasing CPR time from CPR initiation by EMS, both crude and adjusted ORs for 1-month neurological outcomes gradually decreased.ConclusionUsing a large Japanese database of paediatric OHCA patients, we found that longer CPR duration was associated with a lower likelihood of a 1-month moderate disability or better neurological outcome. Less than 1% of paediatric patients exhibited 1-month moderate disability or better neurological outcomes when total CPR duration is more than 64 min.© Author(s) (or their employer(s)) 2024. No commercial re-use. See rights and permissions. Published by BMJ.

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