【Objective】 To explore the incidence of adverse reactions to blood transfusion in Wuxi, so as to provide theoretical basis for further improving the safety of blood transfusion in this area. 【Methods】 211 778 cases of blood transfusion in hospitals in Wuxi from 2017 to 2019 were collected, and the incidence of adverse reactions were retrospectively analyzed. 【Results】 From 2017 to 2019, 750 cases of adverse reactions occurred in Wuxi, with the incidence rate at 0.35%(750/211 778), which kept increasing year by year. The incidence of reactions relative to apheresis platelet transfusion was the highest, about 0.86% (accounting for 32.8%, 246/750), viral inactivated frozen plasma transfusion 0.1% (accounting for 30.4%, 228/750), showing an increasing trend year by year, suspension of leukocytes reduced RBC 0.12%(257/220 106), washed RBC 0.08%(5/6 439) and cryoprecipitate 0.02%(14/750) respectively (the above three accounting for 36.8%, 216/750). The adverse reactions were mainly allergic reactions (67.6%, 507/750) and febrile non-haemolytic transfusion reaction(FNHTR) (28.8%, 216/750), and the incidence of both increased year by year. In addition, there were 6 cases (0.8%, 6/750) of transfusion-associated circulation overload, 2 cases (0.27%, 2/750) of post transfusion purpura, 1 case (0.13%, 1/750) of transfusion-related acute lung injury and 18 miscellaneous cases (2.4%, 18/750). Further analysis revealed that red blood cell products were the main causes for FNHTR, and platelets and plasma products for allergic reactions. 【Conclusion】 The incidence of adverse reactions in Wuxi, mainly composed of allergic and febrile reactions caused by transfusions of blood components other than cryoprecipitate, was lower than the general level in China, but it kept increasing year by year. Measures should be taken by hospitals to strengthen the monitoring, reporting of adverse reactions, so as to prevent and further reduce the incidence of adverse reactions.

【Objective】 To learn the production efficient of platelet components among prefecture-level blood stations in China, to provide supporting data for those blood stations to optimize the production mode of platelet components and continuously improve production efficiency and supply capacity. 【Methods】 The data from 2017 to 2020 was obtained from 24 prefecture-level blood stations who were the members of the practice comparison network for blood institutes in China. The collection units of apheresis platelets, the number of dual-collections of apheresis platelets and plasma, the average apheresis units of one platelet apheresis procedure, the discarded rate of apheresis platelets, the amount of expired apheresis platelets and the amount of apheresis platelets issued were collected. For concentrated platelets, the prepared amount of platelet concentrates and the amount of expired platelet concentrates were collected; both the quantity of qualified and issued concentrated platelets were submitted for statistical analysis.The total output and efficiency of platelet components were calculated based on the collected data. 【Results】 The average annual growth rate of apheresis platelets collection in 24 prefecture-level blood stations was 12.23%, accounting for 99.80% of the total platelet output; the average collection unit of one platelets apheresis procedure was 1.75; from 2019 to 2020, only 5 blood stations performed dual-collection of platelet and plasma during one apheresis procedure; the discarded rate of apheresis platelets was 0.28%, of which 0.007% was due to expiration. A total of 1 621.2 therapeutic units of concentrated platelets were prepared, and 13.03% of them was discarded due to the expiration. The production efficiency of platelet components was 97.56%, of which the production efficiency of apheresis platelets was 97.61% and the production efficiency of concentrated platelets was 74.43%. 【Conclusion】 There are large regional differences in the supply capacity of platelet components in prefecture-level blood stations. Apheresis platelets are the main resource of platelet components product, and the collection capacity is increasing over the years with the characteristics of high production efficiency and low expiration scrapping rate. However, the preparation of concentrated platelets are still limited with relatively low production and high expiration discarded rate.