Factors related to prolonged on-scene time during ambulance transportation for critical emergency patients in a big city in Japan: a population-based observational study

摘要

Objectives We aimed to investigate the factors related to prolonged on-scene times, which were defined as being over 30?min, during ambulance transportation for critical emergency patients in the context of a large Japanese city. Design A population-based observational study. Setting Kawasaki City, Japan's eighth largest city. Participants The participants in this study were all critical patients (age ≥15?years) who were transported by ambulance between April 2010 and March 2013 (N=11?585). Outcome measures On-scene time during ambulance transportation for critical emergency patients. Results The median on-scene time for all patients was 17?min (IQR 13–23). There was a strong correlation between on-scene time and the number of phone calls to hospitals from emergency medical service (EMS) personnel (p0.001). In multivariable logistic regression, the number of phone calls to hospitals from EMS personnel, intoxication, minor disease and geographical area were associated with on-scene times over 30?min. Age, gender, day of the week and time of the day were not associated with on-scene times over 30?min. Conclusions To make on-scene time shorter, it is vital to redesign our emergency system and important to develop a system that accommodates critical patients with intoxication and minor disease, and furthermore to reduce the number of phone calls to hospitals from EMS personnel.