Labile Coagulation Factors in Thawed Fresh Frozen Plasma Prepared by Two Methods

Abstract
Two preparations of fresh frozen plasma were studied. The plasma from CPDA‐1 whole blood units was either frozen within 6 h (FFP‐I) or 18–20 h (FFP‐II) of phlebotomy. Average activity for factor VIII for FFP‐I (n = 6) and FFP‐II (n = 19) was 102% and 55%, respectively (p<0.01). Average activity for factor V and VII in both products was approximately 100%. Factor XI activity (n = 13) in FFP‐II averaged 84%. We conclude that FFP‐I and FFP‐II are equivalent in terms of coagulation factor activity except for factor VIII.