Whole Blood Clotting Time: Variation of Practice in Coagulation Laboratory, Members of Thailand National External Quality Assessment Scheme

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Preechaya Wongkrajang
Wimol Chinswangwatanakul
Panutsaya Tientadakul
Nisarat Opartkiattikul


Objective: To collect the necessary data for a perspective of Whole Blood Clotting Time (WBCT) practice in Thailand.
Methods: In March 2007, 124 questionnaires were sent to laboratory members of the Thailand National External Quality Assessment Scheme (Thailand NEQAS) to obtain essential information about the WBCT practice.
Results: From a dispatch of 124 questionnaires, 120 (96.77%) were returned. There were 101 (84.1%) hospitals performing WBCT in the laboratories and the mean number of WBCTs performed was 16.17 times/month. Eighty nine laboratories (88.11%) used the modified Lee-White methods. Seventy four laboratories (73.26%) used snake bite and other animal bites as
the indication for WBCT. Thirty three laboratories (34.37%) had problems performing the WBCT.
Conclusion: The WBCT methods among the practice of the Thailand NEQAS laboratory members were as various as problems concerning WBCT throughout Thailand. Their practice needs to be improved and standardized by proper education. It also emphasizes the need for an appropriate guidelines for WBCT in Thailand.


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Wongkrajang, P. ., Chinswangwatanakul, W. ., Tientadakul, P. ., & Opartkiattikul, N. . (2020). Whole Blood Clotting Time: Variation of Practice in Coagulation Laboratory, Members of Thailand National External Quality Assessment Scheme. Siriraj Medical Journal, 63(3), 81–84. Retrieved from https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/240915
Original Article


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