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Article History

Received: 19 July 2021

Accepted: 24 November 2021

First Online: 7 December 2021

Declarations

:

: The regional committees for medical and health research ethics (REK) section south-east and the data protection officer at Oslo University Hospital classified this study as a quality assurance project not requiring approval (REK decision 2014/1509). Dispensation from professional confidentiality requirements for other types of research was granted in accordance with REK decision 2014/1510.

: Not applicable.

: Martin Samdal (MS) is a research fellow with Norwegian Air Ambulance Foundation (NAAF) and a consultant anaesthesiologist working both at the Department of Anaesthesiology and Intensive care and the Air Ambulance Department, Drammen Hospital, Vestre Viken Hospital Trust. Kjetil Thorsen (KT) is a senior researcher at NAAF. Ola Græsli (OG) is a paramedic and ICT-advisor at the Pre-hospital division, Oslo University Hospital. Mårten Sandberg (MSb) and Marius Rehn (MR) are consultant anaesthesiologists working at the Pre-hospital Division, Air Ambulance Department, Oslo University Hospital. Rehn is also a senior researcher at NAAF and an associate professor at the University of Stavanger. None of the authors have any other relationships, financial or personal, to disclose that could have inappropriately influenced this study.