Abstract
BackgroundAeromedical transfer can reduce transfer times for primary percutaneous coronary intervention (PPCI). Delays in dispatch of the helicopter and landing-reperfusion can reduce the benefits of air travel. The ad hoc nature of these transfers may compound delays. A formal aeromedical transfer service, with rapid dispatch protocols and rapid landing to balloon times could significantly reduce reperfusion times. MethodsA standard operating procedure (SOP) was developed using a field assessment team (doctor, aircrew paramedic) and a cardiologist-led multidisciplinary team meeting the incoming aircraft. The aeromedical SOP for STEMI care was implemented when anticipated land journey >30min to the nearest PPCI centre. Reperfusion times for actual air travel and estimated virtual land journeys from the same location were compared. ResultsBetween April and December 2009, 8 patients were managed according to the aeromedical SOP. Median air distance 49 miles and road, 40 miles. All subsequent data shown in median minutes (range). Call-balloon time 109 (97–116). Call-aeromedical activation 13 (9–26). Aeromedical activation-arrive scene 12 (9–16). Time at scene 29 (24–52). Call-depart scene 57 (45–75). Air journey 25 (18–30) and landing-balloon 21 (8–22). Call-arrive at PPCI centre for air 85 (70–95); estimated virtual road call-arrive at PPCI centre 102 (85–104). ConclusionsThis SOP delivered sub 120min call-balloon times in all cases undergoing PPCI from difficult locations where anticipated land journeys were >30min. With longer anticipated land journeys (or more remote locations) the proportional gains with air transfer will be greater. Subject to a formal SOP and very rapid landing-balloon times, aeromedical transfer can significantly reduce the number of patients suffering long reperfusion delays in acute myocardial infarction.
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