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Updated: Jul 21, 2026

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Leveraging Turbidity and Thromboelastography for Complementary Clot Characterization
Published on: June 4, 2020
A method to examine the need for duplicate testing of common coagulation tests
J A Koepke1, C E McLaren, A Wijetunga
1Department of Hospital Laboratories, Duke University Medical Center, Durham, North Carolina.
American Journal of Clinical Pathology
|August 1, 1994
Abstract:
A statistical protocol for evaluating the need for duplicate coagulation testing was developed. It requires at least 32 sets of duplicate prothrombin times or partial thromboplastin times over the expected range of results. In addition to the statistical procedures, clinical evaluation of the duplicates is required.

