Difficulty: Medium
Average Score: 76%
Full-length
The nurse is preparing to administer a dose of warfarin (Coumadin) to a client with atrial fibrillation. The clientÔÇÖs INR is 4.5. The nurse should
Correct answer
B
Rationale
An INR of 4.5 (therapeutic range: 2ÔÇô3 for atrial fibrillation) indicates over-anticoagulation, increasing bleeding risk, so the dose should be held and the physician notified. Administering (A) or reducing (C) is unsafe, and vitamin K (D) requires a physician order.