“CO37 | Assessment of Clotting Factor Activity and Sterility in Thawed Fresh Frozen Plasma Supplied to Helicopter Emergency Medical Services for Prehospital Transfusion: D. Romeo1, M. Marchetti1,2, M. Testa1, A. Motta1, P. Gomez-Rosas1, G. Ravasio1, F. Daminelli3, L. Barcella1, A. Falanga1,2 | 1Immunohematology and Transfusion Medicine Department, Hospital Papa Giovanni XXIII, Bergamo; 2School of Medicine and Surgery, University Milano Bicocca, Milan; 3Anesthesia and Resuscitation Department, Hospital Papa Giovanni XXIII, Bergamo, Italy”. 2025. Bleeding, Thrombosis and Vascular Biology 4 (s1). https://doi.org/10.4081/btvb.2025.244.