Posttransfusion platelet counts are directly related to the platelet dose transfused.

Relationship of recipient platelet counts to platelet dose after the transfusion of apheresis platelet products collected from donors administered either placebo (○) or PEG-rHuMGDF (1 μg/kg, ●; 3 μg/kg, ▴). (A) Maximum posttransfusion platelet count. (B) Early (1-4 hours) posttransfusion platelet count increment. (C) Late (18-24 hours) posttransfusion platelet count increment.