What is PTIRN?

Answer 1

It is PT/INR. The prothrombin time (PT) and its derived measures of prothrombin ratio (PR) andinternational normalized ratio (INR) are measures of the extrinsic pathway of coagulation. They are used to determine the clotting tendency of blood, in the measure of warfarin dosage, liver damage, and vitamin K status. The reference range for prothrombin time is usually around 12-15 seconds; the normal range for the INR is 0.8-1.2. PT measures factors I, II, V, VII, and X. It is used in conjunction with the activated partial thromboplastin time (aPTT) which measures theintrinsic pathway.

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