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Methods:

In-patient records for 8,618 trauma casualties treated at the military hospital in Baghdad more than a 3-year interval between January 2004 and December 2006 were retrospectively reviewed and patients requiring MT (n= 694) were identified. Patients who required MT in the first 24 hours and did not receive fresh whole blood were divided into study groups defined by source of platelets:(1) patient receiving a low ratio of platelets (< 1: 16 apheresis platelets per stored red cell unit, aPLT: RBC)(n= 214),(2) patients receiving a medium ratio of platelets (1: 16 to< 1: 8 aPLT: RBC)(n= 154), and (3) patients receiving a high ratio of platelets (≥ 1: 8 aPLT: RBC)(n= 96). The primary endpoint was survival at 24 hours and at 30 days.

Results:

At 24 hours, patients receiving a high ratio of platelets had higher survival (95%) as compared with patients receiving a medium ratio (87%) and patients receiving the lowest ratio …