Characteristics of Children Cared for by a Physician-Staffed Helicopter Emergency Medical Service.

OBJECTIVES: The effectiveness of Japanese helicopter emergency medical services (HEMS) and interventions at the scene is not clear as regard children. For effective use of HEMS at the clinical scene, we need to clarify the characteristics of pediatric patients cared for by HEMS. Therefore, the objective of this study was to describe the characteristics of pediatric scene flights and to describe the procedures performed on the patients. METHODS: This was a retrospective cohort study based on the database for children aged younger than 18 years who were cared for by physician-staffed HEMS of Ibaraki prefecture, in Japan. We reviewed the database for air medical transports conducted at our institution from July 2010 to December 2016. RESULTS: During the 6.5-year period, the Ibaraki HEMS attended to 288 children. The median age of the children was 11 (interquartile range, 5-14) years. Of the total, 196 (68.1%) of the children had trauma-related injuries. The head was the most common site of significant injuries (12.4%). The most common cause of nontrauma incidents was seizure (9.0%). In 65.9% of the patients, the injury or illness was of mild or moderate severity at the scene. An intervention was applied at the scene in 76.0% of the cases: 75.1%, intravenous route; 6.9%, intubation; and 13.4%, drug administration. Of those patients, 29.1% were discharged from the emergency department. In-hospital mortality accounted for 1.5% (n = 2) of the cases. CONCLUSIONS: Although the condition at the scene of most of the pediatric patients transported by the physician-staffed HEMS was not severe, an intervention was frequently applied from the scene. Improving the dispatch criteria and monitoring compliance are needed for appropriate use of HEMS.

Association between physician-staffed helicopter versus ground emergency medical services and mortality for pediatric trauma patients: A retrospective nationwide cohort study.

BACKGROUND: Helicopter emergency medical services' (HEMS) effectiveness for pediatric trauma patients remains unclear. We aimed to examine the relation between HEMS and reduced mortality in pediatric trauma patients. METHODS: This retrospective cohort study utilized data from the Japan Trauma Data Bank, a national multicenter clinical trauma database. Participants were aged <18 years, admitted between 2004 and 2015, and transported from the scene to the hospital by HEMS or ground emergency medical services (GEMS). We used a standardized mortality ratio (SMR) weight method, and fitted a marginal structural model to adjust for measured confounders. The SMR weight was calculated using the estimation of the propensity scores. A logistic regression model was used with the baseline independent variables to estimate the propensity score. RESULTS: Overall, 5,947 patients were identified in our study: 453 were transported by HEMS and 5,494 by GEMS. The mean injury severity score in the HEMS group was significantly higher than that in the GEMS group17.0 (Standard deviation = 11.0) vs 12.2 (Standard deviation = 9.2), p < .001. In-hospital mortality was higher in the HEMS group than that in the GEMS group in the unadjusted analysis (3.8% vs 1.3%, respectively; p < .001). After adjusting for covariates, HEMS transport was not associated with reduced hospital mortality. (odds ratio = 0.82, 95% confidence interval = 0.42-1.58). CONCLUSIONS: HEMS was not associated with reduced mortality among pediatric trauma patients compared with GEMS in this nationwide study. Further investigation is necessary to determine who clearly benefits from HEMS as compared to GEMS.