Abstract: Objective To analyze the distribution characteristics of apheresis platelets donors in Tianjin from 2014 to 2016,and to provide evidence for further optimizing the strategies of recruiting and retaining unpaid blood donations to ensure the clinical blood supply. Methods The data of platelet apheresis blood donors were collected via SHINOW 9.0 modern blood management information system. Descriptive statistical analysis was carried out using SPSS 19.0 statistical software for the total number of blood donors and therapeutic doses,gender,blood type distribution,donation volume and the ratio of repeated blood donations. Results The number of apheresis platelets donors and the amount of therapeutic doses were increasing annually,a total of 83 411 donators gave their apheresis platelets in the past three years,and 125 098 treatment doses were collected. The majority of the blood donors were male,accounting for 84.81%; the blood types distribution included types B>O>A>AB; and 75.87% of the donors had their repeated donations. There were 68.69% of the donors in 2014,63.22% in 2015,and 68.04% in 2016 gave the blood volume equal to two therapeutic doses each time. Conclusion The apheresis platelets collection in Tianjin district showed a promising trend. A long-term strategy of the apheresis platelets donation recruitments should be put forward to ensure the safety and sufficiency of clinical apheresis platelets.

Key words: Apheresis platelets, Distribution characteristics, Voluntary blood donation, Blood components