Prehospital COVID-19 patients discharged at the scene - an observational study.

Background: Emergency medical services (EMS) were the first point of contact for many COVID-19 patients during the pandemic. The aim of this study was to investigate whether the non-conveyance decision of a COVID-19 patient was more frequently associated with a new EMS call than direct ambulance transport to the hospital.

Methods: All confirmed COVID-19 patients with an EMS call within 14 days of symptom onset were included in the study.

Ambulance crew-initiated non-conveyance in the Helsinki EMS system-A retrospective cohort study.

Background: Ambulance patients are usually transported to the hospital in the emergency medical service (EMS) system. The aim of this study was to describe the non-conveyance practice in the Helsinki EMS system and to report mortality following non-conveyance decisions.

Methods: All prehospital patients ≥16 years attended by the EMS but not transported to a hospital during 2013-2017 were included in the study.

Relation of Medical History to the Pediatric Out-of-Hospital Cardiac Arrest Managed by Emergency Medical Services.

Objective: The aim of this study was to examine the medical history of the pediatric out-of-hospital cardiac arrest (OHCA) patients to determine preexisting conditions that may relate to a later OHCA.

Methods: The study was a retrospective population-based cohort study in Helsinki (population 595,000) served by a single emergency medical service (EMS) system. All OHCA patients aged between 0 and 17 met by the local EMS from 2002 to 2011 were included.