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| PROTHROMBIN TIME |
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submitted by dolph12 239 days ago (via moneysuffer.blogspot.com) | |
| The prothrombin time (PT, pro time) test is used to
evaluate the extrinsic pathway of the coagulation
sequence. It represents the time required for a firm
fibrin clot to form after tissue thromboplastin (coag-
ulation factor III) and calcium are added to the
sample. These added substances directly activate
factor X, the key factor in all three coagulation path-
ways (see Fig. 2–1). |
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