A study of factors associated with the location of adrenaline administration by emergency life support technicians in Japan

Abstract

Objective：To examine factors associated with the location of adrenaline administration for out-of-hospital cardiac arrest.

Method：This retrospective cohort study used data from the Japan Utstein Registry and emergency transport data collected from patients who underwent pre-hospital adrenaline administration between 2016 and 2019. The location of adrenaline administration was determined as "on the scene" or "in the ambulance. Multiple logistic regression analysis was used to estimate the association between the location of adrenaline administration.

Result：Adrenaline administration on the scene was significantly positively associated with witnessed (AOR [95%CI], 1.05 [1.01-1.09]), with bystander CPR (AOR [95%CI], 1.17 [1.13-1.22]), with etiology cause of drowning (AOR [95%CI], 1.05 [1.01-1.09]).

Conclusion：To improve the prognosis of out-of-hospital cardiac arrest, the rate at which the procedure is performed on the scene needs to be improved. In the future, factors that cause procedure delays need to be scrutinized, and training provided to address them.