Which test is used to monitor patients on anticoagulant therapy?

The PT/INR (Prothrombin Time/International Normalized Ratio) test is specifically designed to monitor patients on anticoagulant therapy, particularly those receiving vitamin K antagonists such as warfarin. This test measures the time it takes for blood to clot, providing valuable information about the coagulation status of patients. By using the INR, healthcare providers can ensure that a patient’s blood coagulation levels remain within a therapeutic range that minimizes the risk of thromboembolic events while also reducing the chances of excessive bleeding.

Regular monitoring through PT/INR tests allows for adjustments in the dosage of anticoagulants based on the individual patient's response to therapy, thereby enhancing safety and efficacy in the management of conditions requiring anticoagulation. Other tests like a complete blood count, bone marrow biopsy, or blood glucose do not provide relevant information regarding the effectiveness or safety of anticoagulation therapy.