Imsang kŏmsa wa chŏngdo kwalli; Journal of Laboratory Medicine and Quality Assurance; 임상검사와 정도관리
We report here the results of surveys for external quality assessment of blood bank tests performed in 2005. Response rates for the 1st, 2nd and 3rd trial were 97.0%, 96.8%, and 97.1% respectively. Test items for the surveys were ABO grouping, Rh(D) typing, crossmatching, direct antiglobulin test, antibody screening and identification test. The average accuracy rates of ABO grouping and Rh typing were in the range of 99.5-100% and 99.7-100% respectively. In crossmatching test, the accuracy rates were 94.3-98.2% for the compatible samples, 88.5-92.9% for the incompatible samples, and 88.5-92.9% for the samples which could be detected as incompatible only by antiglobulin method. The accuracy rates of direct antiglobulin test were 98.9-99.3% for negative samples and 89.2-96.9% for positive samples. The correct results were reported by 98.3-100% of the surveyed institutions for antibody screening test and 98.9-100% for identification test. Seventeen institutions gave repeatedly incorrect answers for crossmatching. Thirteen institutions out of them gave incorrect answers for all the test specimens sent out 3 times last year.
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