The relationship of platelet yield, donor's characteristic and apheresis instruments in China.

Platelet yield was associated with donor's characteristic and property of apheresis instruments. Here, we have analyzed the relationship of platelet yield, physiologic parameters of donors for different apheresis instruments in China. Data were consecutively retrieved from plateletapheresis donors during March 1, 2007 and March 1, 2012. Three different apheresis instruments MCS+, Amicus, Trima system were used for plateletapheresis and defined as group 1, 2 and 3 respectively. Totally 77,091 Plateletapheresis donations were performed in this study. 17 donations were finally aborted because of vasovagal reaction with syncope. 5861, 37,036, 34,177 donations were performed in group 1, 2 and 3 respectively. Hct and platelet values before donations were similar, but platelet yield and collection rate were showed significantly difference (p<0.05) among the three groups. The values of platelet and Hct in the males before donations were higher than those in the females, and the platelet yield and collection rate were showed significantly difference between the male group and female group (p<0.05). The overall reaction rate was 1.56%. Most donors were chosen the group 2 (51.6%) for next donation, followed by group 3 (33%) and group 1 (15.4%). We concluded that the platelet yield and collection rate in the male group were higher than those in the female group and the efficiency of plateletapheresis was associated with the kind of apheresis instruments and donor's characteristic. These data will help to work out suitable apheresis protocol based on the Chinese donor's characteristic.