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【Objective】 To explore the population characteristics, the reasons for deferral and the changing trend of unqualified rate of blood test of voluntary blood donors in Xi′an, so as to provide a data support for recruiting low-risk regular blood donors, reducing unqualified rate, improving blood safety and blood quality. 【Methods】 The age, gender, occupation, education and unqualified blood test of voluntary blood donors in Xi′an area from 2012 to 2021 were classified and analyzed retrospectively. 【Results】 The number of voluntary blood donors in Xi′an increased year by year from 2012 to 2021, while the overall unqualified rate of blood test kept decreasing, with an overall unqualified rate at 2.36%, which was at a middle level in China. There were more male blood donors than female donors, and the highest proportion of blood donors in terms of age, occupation and education was between 21-30 years old group (40.19%), other occupation group(21.75%), and undergraduate and above group (32.61%) respectively. The total unqualified rate was ALT (0.68%)>HBsAg (0.55%) > anti -HCV (0.48%) > anti -TP (0.43%) > anti -HIV (0.17%). The unqualified rate of blood donors aged 31 to 40 was the highest. With the increase of academic qualifications, the unqualified rate generally showed a gradual downward trend. The unqualified rate of soldiers, teachers, civil servants and medical workers was low, while the unqualified rates of various items of students were high. There were seasonal differences in the total number of blood donors, the total unqualified rate and the unqualified rate of each item (except anti -HIV). 【Conclusion】 The voluntary blood donors are mainly males, aged 21 to 30, with other occupations and with bachelor degree or above. Regular voluntary blood donation teams in this area should be established among soldiers, teachers, civil servants, medical workers and highly educated groups, and more attention should be paid to health consultation for workers, farmers and students before blood donation.
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【Objective】 To analyze testing ability of blood testing laboratories in domestic blood establishments, and to comprehensively understand the resource allocation, workload and unqualified blood samples. 【Methods】 All blood testing laboratories reported the quarterly quality indicator data via their EQA system on the website of National Center for Clinical Laboratories (https: //srv.clinet.cn/qblood/report/add1.aspx). We collected related quality indicators throughout 2020, including resource indicators, number of sample detection, and number (rate) of unqualified samples. All the data were integrated by EQA system. 【Results】 1) Throughout 2020, 324 blood testing laboratories reported that 13 529 778 donations were tested by immunoassays and 13 892 927 donations were tested by nucleic acid testing(NAT). Among them, 253 laboratories reported the data correctly throughout four quarters, and they tested 12 015 407 donations. 2) The number of equipment varied greatly among different laboratories, and a certain equipment was often overloaded in some laboratories. 3) The proportion of domestic ELISA reagents was 100% (322/322), while the proportion of imported NAT reagents was 75.33% (220/300). 4) The positive rate of HBsAg was closely related to geographical locations, as Sichuan (0.86%, 5 895/689 445), Guangdong (0.57%, 5 147/895 929), and Guangxi (0.53%, 3 021/573 216) provinces demonstrated higher positive rates than that of other provincial regions. 【Conclusions】 There are many blood stations across China, with great differences in scale and equipment. There are obvious differences in the positive rates of infectious indicators in different regions. Therefore, the laboratory should make horizontal comparison with the laboratories in the same region, to improve the detection quality of the laboratory in time and effectively.
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【Objective】 To retrospectively analyze the unqualified blood screening results of voluntary blood donors in Guangzhou area during 2016~2020, and analyze various factors that affect the blood screening results, for the purpose of providing a scientific basis for recruitment and retention of blood donors, improving blood safety, and avoiding waste of blood resources. 【Methods】 A total of 1 548 204 voluntary blood donors in Guangzhou from 2016 to 2020 were selected as the research objects, and the blood samples were screened by dual ELISA and once NAT. The unqualified rate of different years and populations were counted and the analysis of risks of unqualified blood testing was performed by conditional Logistics regression. 【Results】 An overall unqualified rate of blood screening was 2.52% in Guangzhou from 2016 to 2020, the unqualified rate of every year showed a downward trend first and then an upward trend. HBsAg and ALT were the two primary deferral causes, the positive rate was 0.65%(10 129/1 548 204) and 1.22%(18 824/1 548 204), respectively; the unqualified rate in male blood donors3.10%(31 091/1 004 079) was significantly higher than that in female(P<0.05), and that in blood donors aged 18~25 was 1.84%(12 781/694 374), which was lower than the other three age groups (P<0.05). Fewer students(1.33%, 4 024/302 007) and bachelor degree donors(1.57%, 5 379/341 662) were deferred. Compared with individual blood donors, group blood donors’ deferral rate(2.62%, 21 307/813 664) was higher. The deferral rate of first-time blood donors(4.57%, 24 469/535 551) were higher than the repeated blood donors (P<0.05) , meanwhile, whole blood donors(2.84%, 38 111/1 340 678) higher than those apheresis donors (P<0.05). Gender, age, occupation, education, frequency and blood components donated were risk factors for unqualified blood screening. 【Conclusion】 The deferral rates of voluntary blood donors in Guangzhou showed an overall upward trend, from 2016 to 2022. HBsAg and ALT were the primary deferral causes, and there were differences in demographics and blood donation characteristics. To formulate targeted recruitment strategies according to the test results of voluntary blood donors, and strengthen the publicity of low-risk groups and the consultation and screening before blood donation, will be a great benefit for reducing the blood scrap and guaranteeing the blood safety.
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【Objective】 To retrospectively analyze the quality status and annual trend of provincial-level centralized blood screening across Ningxia, and discuss the effect and advantages of the application of centralized blood screening. 【Methods】 The centralized detection, with the combination of enzyme linked immunosorbent assay (ELISA) and nucleic acid test(NAT), in Ningxia from 2016 to 2020 was statistically analyzed, and the sample size, overall unqualified rate and unqualified rate of each item were compared among different regions. 【Results】 There were about 70 000 samples in Ningxia annually, 65% were in Yinchuan city, and 35% in Shizuishan, Wuzhong, Guyuan and Zhongwei city. The unqualified rates of blood screening in above five cities were 1.09% (2 438/223 852), 1.48% (401/27 024), 1.50% (425/28 364), 1.01% (351/34 772) and 1.45% (435/30 002) respectively. Significant differences were noticed in the unqualified rates of HBsAg, anti-HCV, anti-TP, HIV Ab/Ag, ALT and HBV DNA (P0.05) among the five cities. 【Conclusion】 Centralized blood screening at provincial-level in Ningxia can optimize the allocation of laboratory resources and better ensure blood safety, which is of great significance to the construction of urban public health system in Ningxia.
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【Objective】 To investigate the age, gender and unqualified blood test of voluntary blood donors, so as to provide a data support for blood donation publicity, recruitment and retainment of blood donors, and to avoid unnecessary waste of blood resources. 【Methods】 The age, gender and unqualified blood test of voluntary blood donors in Lianyungang area from 2017 to 2020 were retrospectively classified and statistically analyzed. 【Results】 The proportion of voluntary blood donors increased with age, and the proportion of blood donation in the 51-60 age group decreased. The unqualified rate of voluntary blood donors showed a downward trend with the increase of age. The unqualified rate of blood test in 51-60 age group was rather low. Except for 18-20 age group, the blood donation ratio and the unqualified rate of blood test of male blood donors in all age groups were higher than those of female blood donors, which were 1.47∶1 and 1.30∶1, respectively. The total unqualified rate of blood test was 1.09%(1 274/117 079), and it decreased year by year. The unqualified item of blood test was ALT>HBV>TP>HCV>HIV, and the unqualified rate of ALT test between male and female blood donors was significantly different(P<0. 05), and the unqualified rate of HBV and TP test in different time periods was significantly different(P<0.05). 【Conclusion】 The publicity of voluntary blood donation for people aged 18-25 and 50-60 should be strengthened, and regular blood donor team should be continuously retained and expanded. Effective consultation and preliminary blood screening before blood donation are of great significance in reducing the unqualified rate of blood test. The unqualified rate of HBV and TP tests can be reduced by scientific preliminary screening process and standardized operation, which is of great significance to reduce the waste of blood resources and ensure blood safety.
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【Objective】 To investigate the unqualified rate of anti-HIV detection of blood screening laboratories in Beijing-Tianjin-Hebei region, and explore the differences in anti-HIV detection ability and influencing factors in each laboratory. 【Methods】 Through filling questionnaires via e-mail, the anti-HIV ELISA unqualified rate and confirmed (WB) positive results (data) from January to December 2018 from 15 blood screening laboratories in Beijing-Tianjin-Hebei region were collected. Our laboratory was responsible for data collection and confirmation, and statistics software SPSS22.0 was used for analysis. 【Results】 1) There was a statistically significant difference among the unqualified rate of anti-HIV ELISA(6.77‱~35.71‱) and confirmed positive rate(0.60‱~3.56‱) in 15 blood screening laboratories in Beijing-Tianjin-Hebei region (P<0.05); 2) There were significant differencse among the ELISA unqualified rate and the confirmed positive rate of 8 reagents for anti-HIV detection(P<0.01), and the sensitivity of the 4th generation detection reagent and the imported reagent was higher than that of the 3rd generation reagent and the domestic reagent. The anti-HIV ELISA unqualified rate of R5 was the highest (19.08‱). 3)There were significant differences in the anti-HIV ELISA unqualified rate of R1, R2, R3, R5 and R7 reagents among different blood station laboratories(P<0.05), and there were no significant differences in the anti-HIV ELISA unqualified rate of R4, R6 and R8 reagents among different blood station laboratories(P>0.05). 4)The unqualified rate of anti-HIV ELISA of laboratories using different regents showed significant differences(P<0.05), except H, J, M. The unqualified rate of imported reagent was significantly higher than that of domestic reagents of laboratories using imported and domestic reagents combinations(P<0.05), except O. 62.5% (5/8) laboratories using domestic 3rd and 4th generation reagent combination showed significant differences in the unqualified rates among different reagents(P<0.05); 5) The positive rate of single-reagent(62.02%~95.45%)in 15 blood screening laboratories showed significant difference(P<0.001), and A was the lowest (62.02%). 【Conclusion】 The anti-HIV detection ability among 15 blood screening laboratories in Beijing-Tianjin-Hebei region is quite different. The application of different reagents is the main factor for the difference, and other factors such as personnel, instruments and test strategies also has a great impact on the detection of anti-HIV. It is still necessary to promote the process of homogenization of blood testing quality among blood screening laboratories in Beijing-Tianjin-Hebei region.
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Objective@#By analyzing the blood samples of unpaid blood donors in Bozhou Central Blood Station from 2010 to 2016, to analyze the distribution of syphilis infection in this area, and provide data support for the investigation of infectious diseases and the screening of voluntary blood donors.@*Methods@#ELISA method was used to detect syphilis antibody.A total of 192 635 blood samples of unpaid blood donors in Bozhou fron 2010 to 2016 were retrospectively analyzed.Syphilis antibody detection showed reactivity of samples identified as unqualified samples.Chi square test of statistical software SPSS13.0 was used for statistical processing.@*Results@#Of 192 635 copies of unpaid blood donors in Bozhou area fron 2010 to 2016, the unqualified rate of anti-TP test was 0.25%.The unqualified rate of female was 0.30%, which of male was 0.21%, the difference was statistically significant (χ2=15.30, P<0.01). The unqualified rate of free workers was 0.40%, and that of students was 0.34%, compared with the total unqualified rate, the difference was significant (χ2=49.25, P<0.01; χ2=6.50, P<0.05). The unqualified rate of primary school education was 0.39%, compared with the total unqualified rate, the difference was statistically significant (χ2=13.13, P<0.01). The unqualified rates of the four age groups were 0.20%, 0.23%, 0.28% and 0.30%, respectively, the difference was not statistically significant(P>0.05).@*Conclusion@#The data show that syphilis unqualified rate of unpaid blood donors in Bozhou at a lower level, female donors have a higher rate of disqualification than male donors.Free-lancer and students are high-risk people, people with low level of education have a high unqualified rate, unqualified samples occur in all ages.
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Objective To investigate the upper limit of plasma′s alanine aminotransferase (ALT ) donated by volunteers in Chongqing city ,utmost avoid blood discarding due to ALT unqualified and provide a scientific basis for the improvement measures . Methods Checking 115 530 blood donors′ALT by rate method ,the activity of ALT value was normal distribution ,deem x ± 1 .96s as the upper limit of ALT of blood donors ,the upper limit of ALT and the unqualified rate was analyzed according tomonth ,age , gender .Results 95% upper limit of blood donors′ ALT reference range to less than 47 .88 U/L .From June to September ,ALT value unqualified rate compared with other months of the year have significant difference (P0 .05) .There was obvious difference about unqualified rate and upper limit between different sex group ,there was statistical significance (P<0 .05) .Conclusion The quantitative blood agen‐cies should increase propagandist strength ,optimize ALT screening strategy ,gender‐specific blood donors screening measures should be taken ,re‐establish a more scientific ALT Elimination standard ,the maximum reduct blood ALT′s failure rate .To ensure the safety and clinical local blood supply at the same time ,the maximum to avoid waste of blood .