title: Safety of helicopter aeromedical transport in Australia: a retrospective study.
abstract: OBJECTIVE
  To determine the accident rate for Australian helicopter emergency medical services (HEMS) per 100,000 flying hours and to determine the patient mortality risk per mission from a HEMS accident.
  
  
  METHODS
  Retrospective observational study of Australian HEMS flying hours and accidents from 1992-2002.
  
  
  RESULTS
  The calculated accident rate for Australian HEMS is 4.38 per 100,000 flying hours. One patient died as a direct result of helicopter accident in 50,164 missions. Overall, one accident occurred every 16,721 missions.
  
  
  CONCLUSIONS
  The overall Australian HEMS accident rate is similar to that reported from other countries, with all accidents occurring in Queensland community HEMS. Helicopters flown at night under Visual Flight Rules (VFR) appear to represent a high-risk subgroup. HEMS flights do not appear to present significant mortality risk to patients being transported.
authors.affiliation: Department of Emergency Medicine, Royal Adelaide Hospital, Adelaide, SA, Australia.
authors.forename: Jim
authors.initials: J
authors.lastname: Holland
authors.forename: David G
authors.initials: DG
authors.lastname: Cooksley
mesh_terms: D000060:Accidents, Aviation / Q000706:statistics & numerical data*; D017732:Air Ambulances / Q000706:statistics & numerical data*; D001315:Australia / Q000453:epidemiology; D004869:Equipment Safety; D006801:Humans; D009026:Mortality; D012189:Retrospective Studies; D018570:Risk Assessment