Emergency aeromedical services in Ireland: a retrospective study for "MEDEVAC112"

Abstract

Aim: This is a retrospective analysis of all consecutive patients requiring emergency aeromedical services (EAS) to a level II trauma centre. This analysis was performed to evaluate the new service to Tallaght Hospital in terms of: the criteria used for dispatch, an estimate of baseline efficiency of time critical management of patients, the cross-catchment transfer of patients.

Methods: Data were provided by the EAS with respect to the patients brought to Tallaght Hospital not including inter-facility transfers for the calendar year 2013. Using this information patient records were matched to the electronic database. Once patients were identified, their hospital journey was catalogued using chart review. Using Google Maps and the EAS data an estimated road-time was calculated. Specific dispatch criteria were unavailable, however, using five broad categories outlined by the American College of Surgeons (ACS) for trauma related dispatch criteria each case was evaluated.

Results: The EAS data had 52 cases which were reported to come to this unit. 48 patient records were accurately matched to this data. 25 % were discharged without speciality input. Seven patients died within 24 h only one of which was admitted under a speciality. 30 patients were admitted under specialist care with two requiring transfer to another centre. 80 % of admissions came under the primary management of the orthopaedic team. 11 patients required operative management, five required ICU management, three required chest drains and one patient required cardiac angiogram. Of the five dispatch criteria categories evaluated the mean number of criteria met was 3.1.

Conclusion: 25 % of the patients were managed in the Emergency Department alone indicating an acceptable level of over-triage according to ACS guidelines. When comparing the dispatch criteria met for this 25 % there was no statistical difference compared with the other 75 %. Sensitivity and specificity analyses have looked at the question of dispatch criteria before and our data are comparable with international evidence. We suggest that further research be undertaken to develop this service to improve activation criteria and thereby the entire service delivered.

Keywords: Dispatch criteria; Helicopter emergency medical services; Pre-hospital care.