<prompt> Massive blood transfusion is defined as -350 ml in 5 min500 ml in 5 min1 Litre in 5 minWhole blood volume  <response>: Massive Blood Transfusion is defined as-According to Sabiston- .transfusion greater than patients total blood volume in 24 hrsor as acute administration of more than 10 units of blood over a few hours.According to Schwartz-Massive transfusion is a single transfusion of 2500 ml or 5000 ml transfused over a period of 24hrs. 