Massive blood transfusion is defined as:: (A) Whole blood volume in 24 hours, (B) Half blood volume in 24 hours, (C) 40% blood volume in 24 hours, (D) 60% blood volume in 24 hours
Answer is A. Massive transfusion is defined, in adults, as replacement of whole blood volume in 24 hours or >50% of blood volume in 4 hours.