Which laboratory test is the most important for the postanesthesia care nurse to monitor closely in the patient who is prescribed warfarin in the treatment of atrial fibrillation?

Question

Quizplus · Accepted Answer

Prothrombin time (PT) and its derived measure, the International Normalized Ratio (INR), are the most important tests to monitor in patients taking warfarin. This is because warfarin's mechanism of action involves inhibiting the synthesis of vitamin K-dependent clotting factors, which affects the blood's ability to clot. PT/INR values help ensure the dose of warfarin is appropriate to prevent clot formation (as in the case of atrial fibrillation) without causing excessive bleeding.

Which Laboratory Test Is the Most Important for the Postanesthesia