• Anne E Weaver, Ceri Hunter-Dunn, Richard M Lyon, David Lockey, and Charlotte L Krogh.
• Emergency Medicine & Pre-hospital Care, London's Air Ambulance, The Royal London Hospital, Whitechapel Road, London E1 1BB, United Kingdom. Electronic address: anne.weaver@bartshealth.nhs.uk.
• Injury. 2016 Jan 1; 47 (1): 3-6.

BackgroundMajor trauma is a leading cause of mortality and serious morbidity. Recent approaches to life-threatening traumatic haemorrhage have emphasized the importance of early blood product transfusion. We have implemented a pre-hospital transfusion request policy where a pre-hospital physician can request the presence of a major transfusion pack on arrival at the destination trauma centre.ObjectivesThis study was performed to establish whether three simple criteria (1) suspicion or evidence of active haemorrhage (2) systolic BP<90 mmHg (3) failure of blood pressure to respond to an intravenous fluid bolus) which were used to activate a pre-hospital 'Code Red' transfusion request accurately identified seriously injured patients who required transfusion on arrival at hospital.MethodsProspective evaluation of all pre-hospital 'Code Red' requests over a 30-month period (August 2008-May 2011) was performed for patients transported to a major trauma centre. Mechanism of injury, Injury Severity Score, hospital mortality, and use of blood products were recorded. Patients were followed up to hospital discharge.Results176 'Code Red' activations were made in the study period. 129 patients were transported to the Trauma Centre. Mechanism of injury was penetrating trauma in 39 (30%) cases, road traffic collision in 58 (45%), falls in 18 (14%) and 'other' in 14 (10.8%). Complete data was available for 126 patients. Of the patients reaching hospital, 20 died in the emergency department or operating theatre, 22 died following admission and 84 survived to hospital discharge. Mean Injury Severity Score (ISS) was 29.1. (range 0-66). Overall, 115 (91%) of the patients declared 'Code Red' pre-hospital received blood product transfusion after arrival in hospital. Eleven patients did not receive any blood products following hospital admission. In patients declared 'Code Red' pre-hospital, mean packed red blood cell transfusion in the first 24-h was 10.4 unit (95% CI 8.4-12.3 unit).ConclusionsThe use of simple pre-hospital criteria allowed physicians to successfully identify trauma patients with severe injury and a requirement for blood product transfusion. This allowed blood products to be ready on the patient's arrival in a major trauma centre with the potential for earlier transfusion.Copyright © 2015 Elsevier Ltd. All rights reserved.

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