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A Questionnaire Survey of HLA Crossmatch Tests in Korea (2015)
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2015년 국내 HLA 교차시험 현황 설문조사

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Type
Academic journal
Author
유신애 (성균관대학교 의과대학 진단검사의학교실) KANG EUN SUK (성균관대학교) Myoung Hee Park (한국장기기증원 KODA LAB)
Journal
대한진단검사의학회 Laboratory Medicine Online Laboratory Medicine Online 제7권 제3호 KCI Accredited Journals
Published
2017.7
Pages
147 - 156 (10page)

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A Questionnaire Survey of HLA Crossmatch Tests in Korea (2015)
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Background: We carried out a questionnaire survey for laboratories performing human leukocyte antigen-crossmatch (HLA-XM) to provide a basis for laboratory standardization of HLA-XM tests in Korea. Methods: The questionnaires were distributed to 51 HLA laboratories participating in the HLA-XM part of the HLA proficiency survey program organized by the Korean Society for Laboratory Medicine and replies from 50 laboratories were analyzed. The questionnaires included following items: 1) HLA-XM methods performed and annual number of tests, 2) types of the specimen and lymphocyte separation methods, 3) test procedures and reagents for complement-dependent cytotoxicity crossmatch (CDC-XM) and flow cytometry crossmatch (FCXM). Results: The number of laboratories performing anti-human globulin (AHG) CDC-XM (47/49, 96%) and FCXM (30/50, 60%) was considerably increased compared to the 2005 survey (AHG CDC-XM, 35/43, 81%; FCXM, 7/44, 16%). As for the annual number of XM tests, more than 50% of the laboratories were low volume laboratories performing ≤50 tests, and only 10% of the laboratories were performing >500 tests. For cell isolation methods, negative selection was used by 43% (21/49) of laboratories performing CDC-XM. Number of cells reacted per 1 μL of serum varied among different laboratories in both CDC-XM (1,000?8,000) and FCXM tests (1,300-20,000). For the interpretation of FCXM, log fluorescence ratio (26/30, 87%) was more commonly used than channel shift values (5/30, 17%). Conclusions: Considerable variation is noted in both CDC-XM and FCXM methods performed by different laboratories. A continuous effort for laboratory standardization is needed to reduce inter-laboratory variation in the HLA-XM test results.

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