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Updated: Aug 14, 2026

Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay
Published on: September 9, 2012
Coagulation factor analysis in patients on long-term anticoagulation
Ninety studies on 58 patients undergoing chronic warfarin therapy included Quick prothrombin times, partial thromboplastin times, thromboplastin generation tests and assays for clotting factors II, V, VII, VIII, IX, X, XI and XII. The results indicate no benefit from supplementation of the Quick tests by any of these other procedures. It is suggested that the Quick test uniformly performed, using a standard uniform thromboplastin, would be the procedure of choice.
Ninety studies on 58 patients undergoing chronic warfarin therapy included Quick prothrombin times, partial thromboplastin times, thromboplastin generation tests and assays for clotting factors II, V, VII, VIII, IX, X, XI and XII. The results indicate no benefit from supplementation of the Quick tests by any of these other procedures. It is suggested that the Quick test uniformly performed, using a standard uniform thromboplastin, would be the procedure of choice.
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