The intrinsic system of coagulation is measured by the __________.

Question

Quizplus · Accepted Answer

The intrinsic system of coagulation is measured by the APTT (activated partial thromboplastin time). This test is used to evaluate the activity of coagulation factors XII, XI, IX, VIII, X, V, and II in the intrinsic pathway. The other options (PT, Fibrinogen assay, TT, and Reptilase time) are used to measure different aspects of the coagulation cascade. PT measures the extrinsic pathway and common pathway. Fibrinogen assay measures the concentration of fibrinogen, a key factor in clot formation. TT measures the activity of the final step of the coagulation cascade, the conversion of fibrinogen to fibrin. Reptilase time measures the same step as TT, but using a different reagent.

The Intrinsic System of Coagulation Is Measured by the __________