ABSTRACT
【Objective】 To establish the donor bank for local region and distinguish the donors based on the past blood donation frequency and blood donation type, so as to improve the application efficiency of platelet bank. 【Methods】 1) According to the donation type and frequency of blood donors, the blood donors who had joined China Marrow Donor Program(CMDP)in our center from 2011 to 2020 were screened and classified. They are classified as reserve donors, prospective donors, and active donors. The donors, who met the selection conditions of active donors, were enrolled from all apheresis donors in 2020 to expand the local platelet bank. 2) In 2020, 739 blood donors who met the conditions of active donors were screened(including donors who had entered CMDP), and their HLA-A/B loci were detected by HLA high-resolution genotyping, and HPA was detected by Q-PCR genotyping. 3) The compatible platelets provided by three types of donors in 2021 were calculated. 【Results】 1) Taiyuan platelet bank, composed of donors with different previous donation experiences, had been constructed, including 739 active donors, 3840 prospective donors and 18 715 reserve donors. The composition ratio of ABO blood groups among three types of donors was found to be similar via chi square test; there were more male than female in three groups. 2) In 2021, the ratio of the average redonation by active donors in the platelet bank to the regular donation by the general donors was 14.4∶3.98. 3) Of the 142 compatible platelets, supplied to PTR patients in 2021, 83.8% of them came from the redonation of active donors after registration in the bank, and 9.9% and 6.3% from prospective donors and reserve donors, respectively. 4) In 2021, 28.1% of the stored pheresis platalets in our center had HLA typing data, and 54.2% of compatible platelets were retrieved from the inventory, which timely met the needs of clinical patients. 【Conclusion】 Integrating resources and distinguishing the activity degree of donors in platelet bank can reduce the cost of bank building and improve the application efficiency of the platelet bank.
ABSTRACT
【Objective】 To understand the structural characteristics of lapsed apheresis donors in our blood center and provide guidance for further improving recruitment and retention strategies by retrospectively analyzing the characteristics of lapsed apheresis donors in our center in recent years. 【Methods】 The apheresis donation and lapsed apheresis donors in Zhejiang Blood Center from 2016 to 2020 were statistically analyzed, and the general information of lapsed donors, including gender, blood type, age, education level and occupation composition, were compared and analyzed. The lapse of novel and long-term donors with different frequency were retrospectively analyzed. The SPSS 19.0 statistical software package was used for data analysis. 【Results】 In 2020, the total lapse of apheresis donors decreased by 16.6% as compared with 2016(P<0.05). The lapse rate of donors with blood groups A, B, O and AB was 1∶1∶1∶1, higher in female donors(59.0%) than males(50.0%), and dominated by age group of 18-35(66.3%). With the increase of age, the lapse rate decreased. Donors lapsed were mainly with college or above educational background(60.8%), with high proportion in students and the staff. In 2020, the lapse of novel apheresis donors decreased by 34.1% as compared with 2016, but the average lapse rate of novel apheresis donors was still as high as 70.5%. The average lapse rate of blood donors with different frequency was 52.5%, and the lapse rate decreased significantly with the increase of apheresis donation frequency. The average lapse rate of novel blood donors with whole blood donation experience was lower than those without (56.1% vs 82.9%). 【Conclusion】 Multiple measures for recruitment and retention have effectively reduced the lapse of apheresis donors. However, apheresis donors who are 18-35 years old, with college degree or above, students and staff were the main groups from lapsing. In addition, low-frequency and novel apheresis donors without whole blood donation experience were more likely to be lapsing. Targeted and personalized blood donation services should be further provided, and the management of " full cycle of blood donation" should be strengthened to reduce the lapsing, so as to retain more blood donors.
ABSTRACT
【Objective】 To discuss the prevention and control strategies of physical examination and health consultation for apheresis donation during the COVID-19 outbreak, and to verify its necessity and efficiency. 【Methods】 A three-stage (Hubei import period, Jan 23 to 31; local(Zhejiang) epidemic period( Feb 1 to Mar 1); overseas import period, Mar 2 to 22) prevention and control strategy for physical examination and health consultation during the COVID-19 outbreak from January 23 to March 22, 2020 was adopted by our center, and the consultation of residence history, contact history, and the investigation of related symptoms were added to health consultation.The deferral rates of health consultation and physical examination during the COVID-19 outbreak were compared with the same period in 2019. The deferral rates in each stage were compared, containing those contributed by first-time and regular apheresis donors. 【Results】 The deferral rates of health consultation during the epidemic period and the same period in 2019 were 2.31%(100/4 371) vs 1.62%(78/4 740) (P0.05) The deferral rate of travel contact history was the highest at 2.05%(40/1947)during local epidemic period, and respiratory symptoms at 1.29%(5/388)during Hubei import period. The deferral rates of blood pressure during the three stages were1.85%(7/378)vs 3.57%(67/1877)vs 4.08(82/2009)(P>0.05). The deferral rate of health consultation and physical examination in first-time and regular apheresis donors were 5.86%(38/649)vs 1.65%(61/3 696)and 5.79%(35/604)vs 3.41%(124/3 635)(P<0.01). 【Conclusion】 The deferral rates of health consultation and physical examination increased significantly during the COVID-19 epidemic. Therefore, it is necessary to formulate and adopt a targeted consultation strategy during the epidemic period to block COVID-19 transmission to the greatest extent.
ABSTRACT
BACKGROUND: There has not been a comprehensive review to compare the international eligibility criteria for apheresis donation. This study assessed the international variations of the eligibility criteria for apheresis donors to help improve our national criteria for safer and more efficient screening of donors. METHODS: We reviewed the websites of the American Red Cross, Canadian Blood Service, Australian Red Cross Blood Service, New Zealand Blood Service, Japanese Red Cross Society, Hong Kong Red Cross (HKRC), Health Sciences Authority of Singapore and the National Blood Service of the UK (NBS) and the European Union (EU). Only those criteria that were different from ours were analyzed. RESULTS: A considerable number of differences were identified between the international criteria and our criteria. The lower age limit was 17~18 years and the upper limit were 50~69 years for plasma donation and 50~59 years for platelet donation. The regulations for donation frequency ranged from none to 12~57 times/year for plasma and none to 12~24 times/year for platelets. The donation interval for plasma and platelets was 1~4 weeks. A minimum hemoglobin level of 12.5 g/dL was used in most countries, excluding the HKRC (11.5 g/dL for women). The NBS and EU had criteria regarding the volume of donation. CONCLUSION: Different international eligibility criteria for apheresis donors are used according to the characteristics of each country. Thus, the compiled data from various countries will provide the basis to improve our national eligibility criteria for apheresis donors.