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prothrombin time |
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prothrombin time [prō′thräm·bən ‚tīm] (pathology) A one-stage clotting test based on the time required for clotting to occur after the addition of tissue thromboplastin and calcium to decalcified plasma. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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In addition, all patients were screened by several laboratory tests, including measurement of the complete blood count (CBC), including platelet count; prothrombin time (PT) to evaluate the extrinsic coagulation pathway (factor II, V, VII, and X activity), which were converted to calculate the International Normalized Ratio (INR) (7); and activated partial thromboplastin rime (aPTT) to evaluate the intrinsic coagulation pathway (factor VIII, IX, XI, and XII activity). Laboratory findings included albumin/globulin inversion, gamma globulin of 24%, slightly prolonged prothrombin time (14 sec), and a prothrombin index of 43%. For example, it is difficult to see that the patient had several Prothrombin time tests before warfarin therapy was initiated on January 16. |
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