A patient on warfarin sodium following myocardial infarction reports for an oral surgical procedure which one of the following laboratory tests should be preferred to ascertain the fitness_______________?

Correct answer: A. Prothrombin time

A. Prothrombin time
B. Tourniquet time
C. Clotting time
D. Bleeding time

Explanation

Warfarin inhibits vitamin K-dependent clotting factors and is monitored with prothrombin time, reported clinically as the INR. Bleeding time and tourniquet time assess platelet or capillary function rather than warfarin effect.

Submitted by a TestUstad contributor and published by the TestUstad editorial teamLast updated 18 September 2026

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A patient on warfarin sodium following myocardial infarction reports for an oral surgical procedure which one of the following laboratory tests should be preferred to ascertain the fitness_______________?

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