External quality assessment scheme in red blood cell serology: a 5-year experience in Thailand

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Immunohematology

American National Red Cross

Subject: Medical Laboratory Technology

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ISSN: 0894-203X
eISSN: 1930-3955

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VOLUME 22 , ISSUE 1 (March 2006) > List of articles

External quality assessment scheme in red blood cell serology: a 5-year experience in Thailand

Sasitorn Bejrachandra / Jariya Saipin / Oytip Nathalang / Usanee Siriboonrit / Ekaraj Rungroung / Sudjai Udee

Keywords : RBC serology, external quality assessment, Thailand

Citation Information : Immunohematology. Volume 22, Issue 1, Pages 1-5, DOI: https://doi.org/10.21307/immunohematology-2019-338

License : (Transfer of Copyright)

Published Online: 01-April-2020

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ABSTRACT

From 2000 to 2004, 36, 58, 72, 78,and 86 laboratories participated in an external quality assessment scheme (EQAS) organized by the Department of Transfusion Medicine, Faculty of Medicine Siriraj Hospital. Each year the staff was requested to perform ABO grouping,D typing,antibody screening,antibody identification,and DATs on eight blood samples. Each participant received information on the correct test results and a coded summary. Regarding ABO grouping, the error .rate ranged from 0.3 to 1.3 percent,mostly due to human errors. Error rates in D typing ranged from 0.7 to 5.7 percent, the most problematic being weak D phenotype interpretation. Although every sample was negative by the DAT, error rates due to false positive test results were determined to be 0.4 to 2.1 percent. Antibody screening errors were also found; however, errors steadily decreased from 4.2 percent in 2000 to 0.3 percent in 2004. Only 69.4 to 87.2 percent of laboratories performed antibody identification;however,correct results increased from 78.4 to 91.0 percent. In conclusion,an EQAS in RBC serology should be used to compare results from different laboratories and to identify those laboratories that need improvement in testing procedures.

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