The distribution characteristics of ABO and RhD blood groups in the world were different and the data were limited. The aim was to investigate the distribution characteristics of ABO and RhD blood groups in Chongqing, and to provide scientific-effective data for a more reasonable blood collection program. We retrospectively analyzed 795 698 blood donors who had donated blood from 2014 to 2019 at the Chongqing Blood Center. The data on ABO and RhD blood groups were extracted based on blood management system. We used percentages to describe the extraction of data on blood donors by gender, age, and nationality. The data on the distribution of ABO (A, B, AB and O) and RhD (RhD-Positive and RhD-Negative) blood groups were reported also in percentages. Of those, 427 516 (53.73%) were males and 368 182 (46.27%) were females. Among all the blood donors, 321 916 (40.46%) were under the age of 25, followed by 26–35 years age group (22.65%), 36-45 years age group (18.95%), 46-55 years age group (16.98%) and 56-60 years age group (0.96%). There were 755439 (94.94%) of the blood donors who were of the Han nationality. The distribution of blood groups O, A, B and AB were 35.54%, 31.90%, 24.14% and 8.42%, respectively. The distributions of RhD-Negative group was found in 4362 (0.55%) blood donors. The distribution characteristics of the ABO and RhD blood group should be considered when improving blood collection program in Chongqing.

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Background To study the changes of whole blood cells and plasma proteins in donors after plateletpheresis with multiple donations. Materials and Methods From October 2015 to September 2019, 42 donors with a plateletpheresis interval of 14-16 days and more than 20 times were selected as the research subjects. The venous blood samples were collected from the first and the last screening before plateletpheresis. The result of last screening before plateletpheresis as the observation group, and the first as the control group. Then, the venous blood samples was detected. Results The whole blood cells and plasma proteins in donors after plateletpheresis changes within a normal range in the two groups. The PLT counts in the the observation group was 220.1±40.4 x109/L, which was no statistically significant compared with the change of 216.6±44.5 x109/L in the control group(P>0.05). The HGB in the the observation group was 142.8±10.2 g/L, which was no statistically significant compared with the change of 142.1±8.3g/L in the control group(P>0.05). The HCT in the the observation group was 43.50±3.2%, which was no statistically significant compared with the change of 44.1±2.8% in the control group(P>0.05). The serum TP levels in the the observation group was 70.4±4.7g/L, which was no statistically significant compared with the change of 69.0±4.8g/L in the control group(P>0.05). The serum ALB levels in the observation group was 46.3±2.3g/L, which was no statistically significant compared with the change of 45.8±2.3g/L in the control group(P>0.05). Conclusion There have no effect on the whole blood cells and plasma proteins in donors after plateletpheresis with multiple donations.