Abstract: Objective To explore better quality parameters for valuation of plateletpheresis,we investigate the platelets parameters of donors and recipients.Methods One hundred and four apheresis platelet collected in Zhangzhou Blood Center from June 2015 to December 2016. Platelets parameters of donors and recipients before and after transfusion were analyzed by Sysmex XN-1000 automated blood cell counter. Results For recipients of single and double unit apheresis platelet transfusions,there is a significant difference among the pretransfusion and 1st hour immature platelet count （IPC） （P_single-unit<0.001,P_double-unit<0.001）,and 24th hour IPC （P_single-unit=0.015,P_double-unit<0.001）. There is a positive correlation between donor IPC and the percent change between pretransfusion and 1st hour after transfusion of recipient（r=0.536,P<0.001）,and percent change between pretransfusion and 24th hour after transfusion of recipient（r=0.413,P<0.001）. Conclusion IPC can be used to determine the quality of plateletpheresis in terms of evaluation of donors and also in the follow up of recipients undergoing platelet transfusion.

Key words: Immmature platelet count, Plateletpheresis, Quality parameters