Updated on November 9, 2024 Massive Transfusion Massive transfusion is defined as the administration of greater than 1 total blood volume (10 – 20 units of blood) in 24 hours or replacing 1/2 of the blood volume in < 1 hour *(*about 5 – 10 units) Common products used in Massive Transfusion include 6 pRBCs,...