Register

American Medical Certification Association (AMCA) Phlebotomy Practice Exam

Access More Questions
A patient taking warfarin is scheduled for a procedure with substantial bleeding risk. Which laboratory value is most directly used to assess warfarin's anticoagulant effect?
Correct Answer:
International normalized ratio
Explanation:
Warfarin prolongs the prothrombin time, which is standardized as the international normalized ratio (INR). The INR is therefore the routine laboratory measure used to assess its anticoagulant effect.

Access more questions from this quiz

Continue to American Medical Certification Association (AMCA) Phlebotomy Practice Exam for more practice questions and the full quiz experience.

Access More Questions