Nationwide estimates of potential lives saved with prehospital blood transfusions.

Introduction: Prehospital blood transfusions result in a significant reduction in mortality risk for injured patients in hemorrhagic shock; however, prehospital blood transfusions have not been widely implemented across the United States. Thus, a paucity of data surrounding the impact of achieving near-complete population-level access to this resource exists. We aimed to determine the number of lives that could potentially have been saved among injured patients in hemorrhagic shock between 2020 and 2023 had prehospital blood products (blood components or whole blood, pBP) been fully implemented.

Methods: We performed a retrospective review of the National Emergency Medical Services Information System (NEMSIS) from 2020 to 2023 for all trauma patients ≥16 years. Patients with prehospital systolic blood pressure <90 mmHg and heart rate >108 beats per minute, or a systolic blood pressure <70 mmHg, and who did not receive pBP products were included in the analysis. Potential lives saved were calculated using mortality and risk ratio estimates (RR) from previously published studies, assuming 100% nationwide access to pBP. A series of models were developed incorporating varying RR, mortality rate assumptions, and nationwide access to pBP to encompass a wide range of scenarios.

Results: A total of 260,472 patients met our inclusion criteria. Using a 22.1% 24-h mortality rate and an RR of 0.629, 21,356 deaths over the four-year study period could have potentially been saved with the nationwide implementation of pBP.

Conclusion: Transfusion of pBP offers the potential to save thousands of injured patients lives. Efforts toward making policy-level interventions aimed at increasing the adoption and availability of pBP should be sought.