• Louise Milling, Jeannett Kjær, Lars Grassmé Binderup, de MuckadellCaroline SchaffalitzkyCSPhilosophy, Department for the Study of Culture, University of Southern Denmark, Odense, Denmark., Ulrik Havshøj, ChristensenHelle CollatzHCThe Danish Clinical Quality Program, National Clinical Registries, Copenhagen, Denmark., Erika Frischknecht Christensen, Annmarie Touborg Lassen, Søren Mikkelsen, and Dorthe Nielsen.
• Prehospital Research Unit, Department of Anaesthesiology and Intensive Care, Odense University Hospital, Kildemosevej 15, 5000, Odense C, Denmark. louise.milling@rsyd.dk.
• Scand J Trauma Resus. 2022 Mar 28; 30 (1): 24.

AimThis systematic review explored how non-medical factors influence the prehospital resuscitation providers' decisions whether or not to resuscitate adult patients with cardiac arrest.MethodsWe conducted a mixed-methods systematic review with a narrative synthesis and searched for original quantitative, qualitative, and mixed-methods studies on non-medical factors influencing resuscitation of out-of-hospital cardiac arrest. Mixed-method reviews combine qualitative, quantitative, and mixed-method studies to answer complex multidisciplinary questions. Our inclusion criteria were peer-reviewed empirical-based studies concerning decision-making in prehospital resuscitation of adults > 18 years combined with non-medical factors. We excluded commentaries, case reports, editorials, and systematic reviews. After screening and full-text review, we undertook a sequential exploratory synthesis of the included studies, where qualitative data were synthesised first followed by a synthesis of the quantitative findings.ResultsWe screened 15,693 studies, reviewed 163 full-text studies, and included 27 papers (12 qualitative, two mixed-method, and 13 quantitative papers). We identified five main themes and 13 subthemes related to decision-making in prehospital resuscitation. Especially the patient's characteristics and the ethical aspects were included in decisions concerning resuscitation. The wishes and emotions of bystanders further influenced the decision-making. The prehospital resuscitation providers' characteristics, experiences, emotions, values, and team interactions affected decision-making, as did external factors such as the emergency medical service system and the work environment, the legislation, and the cardiac arrest setting. Lastly, prehospital resuscitation providers' had to navigate conflicts between jurisdiction and guidelines, and conflicting values and interests.ConclusionsOur findings underline the complexity in prehospital resuscitation decision-making and highlight the need for further research on non-medical factors in out-of-hospital cardiac arrest.© 2022. The Author(s).

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