Question

What is the coagulation parameter affected by warfarin?

1) Prothrombin time (PT)
2) Activated partial thromboplastin time (aPTT)
3) International normalized ratio (INR)
4) Platelet count

Answer 1

Warfarin affects the coagulation parameter Prothrombin time (PT), which measures the clotting time of blood. Warfarin inhibits the synthesis of vitamin K-dependent clotting factors, including prothrombin.

Step-by-step explanation:

The coagulation parameter affected by warfarin is Prothrombin time (PT). Prothrombin time is a measure of how long it takes for blood to clot. Warfarin, an anticoagulant medication, works by inhibiting the synthesis of vitamin K-dependent clotting factors, including prothrombin. Therefore, when warfarin is taken, the prothrombin time is prolonged, indicating a slower clotting time.