A report of two years of pre-hospital blood transfusions by Thames Valley Air Ambulance

Abstract

Introduction Thames Valley Air Ambulance have carried two units of red blood cells on board both the aircraft and rapid response car since 2014. Methods A retrospective database narrative review of patients receiving blood was carried out. Results Data were analysed for 63 patients, the age range was 13 years to 89 years and 74.6% were male. Blunt trauma was the mechanism of injury in 84%. Overall, 16% of patients died at scene, 32% died either in the Emergency Department or as a hospital inpatient and 52% survived to discharge. There were no survivors from traumatic cardiac arrest who received blood products. Injury Severity Scores (ISS) ranged from 4 to 75, and 95% of the patients for whom data were available had an Injury Severity Scores greater than 15. Discussion Patients who received pre-hospital blood transfusions were overwhelmingly those with high Injury Severity Scores and the majority who survived to hospital received additional blood products on arrival. This suggests that our pre-hospital blood transfusions were correctly targeted to severely injured patients who had a need for blood transfusion in hospital.