Which statement about monitoring anticoagulation with INR is true?

Which statement about monitoring anticoagulation with INR is true?

• A. It measures oxygen saturation
• B. It is used to monitor anticoagulation therapy
• C. It measures blood sugar
• D. It assesses kidney function

Answer: (B)

INR is used to monitor anticoagulation therapy. It standardizes the prothrombin time so results are comparable across labs, allowing careful adjustment of drugs like warfarin to keep the patient within a safe therapeutic range. This helps prevent clots while minimizing bleeding risk. Oxygen saturation measures how well blood carries oxygen, not clotting tendency. Blood sugar reflects glucose control, and kidney function is assessed with markers like creatinine and eGFR. So the true statement is that INR monitors anticoagulation therapy.

INR is used to monitor anticoagulation therapy. It standardizes the prothrombin time so results are comparable across labs, allowing careful adjustment of drugs like warfarin to keep the patient within a safe therapeutic range. This helps prevent clots while minimizing bleeding risk.

Oxygen saturation measures how well blood carries oxygen, not clotting tendency. Blood sugar reflects glucose control, and kidney function is assessed with markers like creatinine and eGFR. So the true statement is that INR monitors anticoagulation therapy.