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  • Title: Detection of mild factor VIII Deficiency by thrombokinetics.
    Author: Natelson EA, Shapiro D, Smith DF.
    Journal: Am J Clin Pathol; 1975 Jul; 64(1):95-100. PubMed ID: 1155379.
    Abstract:
    The maximal rate of change in optical density (Vmax-deltaOD)of plasma clots forming in the activated partial thromboplastin time test (APTT) may be significantly influenced by reductions in factor VIII activity insufficient to also cause a distinctly abnormal timed clotting endpoint. Analysis of relationships between Vmax-deltaOD of clotting plasma in the APTT, prothrombin time, and thrombin time tests provides a basis for increasing the screening value of the APTT in suggesting intrinsic system abnormalities. Three illustrative case reports support the added benefit of thrombokinetics in the detection of mild factor VIII deficiency in hemophilia A and in von Willebrand's disease.
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