A client with a history of deep vein thrombosis (DVT) is prescribed warfarin. Which laboratory value is most important for the nurse to monitor to ensure therapeutic effectiveness and client safety?

The correct answer to the question "A client with a history of deep vein thrombosis (DVT) is prescribed warfarin. Which laboratory value is most important for the nurse to monitor to ensure therapeutic effectiveness and client safety?" is Option B: International Normalized Ratio (INR).

The other options — A) Partial Thromboplastin Time (PTT), C) Platelet count, D) Bleeding time — are incorrect for this NCLEX-RN Exam Prep question. As explained above: The International Normalized Ratio (INR) is the standard laboratory test used to monitor the therapeutic effects of warfarin, ensuring the client's blood clotting time is within the desired range to …