Study supports flexible blood transfusion options in emergency trauma care

A large-scale trial conducted by University of Pittsburgh and UPMC clinicians has shown that paramedics and emergency medical technicians can use either whole blood or blood components to treat patients with severe traumatic bleeding before hospital arrival, with no difference in effectiveness. The Type O Whole blood and assessment of Age during prehospital Resuscitation (TOWAR) Trial, published in *New England Journal of Medicine*, randomized 1,020 severely bleeding patients—transferred by medical helicopter—into two groups: one receiving whole blood and the other blood components. About 20-25% of patients in both groups died within 30 days, compared to roughly 33% mortality for those who did not receive prehospital blood. The study resolves long-standing uncertainty about whether whole blood or components are superior, allowing emergency responders to prioritize accessibility over method. In civilian settings, blood components are more common, while military contexts often rely on whole blood; the findings confirm both are equally viable. Researchers also found that blood age—whether fresh or nearing expiration—did not impact patient outcomes, as survival rates remained consistent regardless of donation date. The trial, spanning May 2022 to June 2025, was led by Jason Sperry, M.D., M.P.H., chief of trauma surgery at UPMC, and Francis Guyette, M.D., medical director of STAT MedEvac, the nation’s largest academic critical care transport group. Their work aligns with a concurrent European study, also published in *New England Journal of Medicine*, which reached similar conclusions. The combined findings are expected to influence trauma care guidelines from medical societies overseeing blood handling and emergency surgery. Traumatic bleeding remains the leading cause of trauma-related deaths, often more time-sensitive than strokes or heart attacks, but the study underscores that early blood transfusion—whether whole or component—can prevent fatalities. The results provide critical flexibility for emergency responders, ensuring patients receive life-saving care as quickly as possible, regardless of blood supply logistics.