Difficulty: Medium
Average Score: 72%
Full-length
The physician has prescribed Coumadin (sodium warfarin) for a client having transient ischemic attacks. Which laboratory test measures the therapeutic level of Coumadin?
Correct answer
A
Rationale
Prothrombin time (PT/INR) measures Coumadin's anticoagulant effect by assessing clotting time. PTT monitors heparin, and clot retraction or bleeding time are unrelated.