A coagulation factor test is a laboratory test that measures the level of specific proteins in the blood that are involved in the clotting process. There are several different types of coagulation factor tests that can be ordered, including prothrombin time (PT), partial thromboplastin time (PTT), and international normalized ratio (INR). These tests are typically ordered to assess the clotting ability of the blood and to help diagnose and monitor various medical conditions that affect the clotting process, such as bleeding disorders, liver disease, and certain medications. The test is usually performed on a sample of blood that is drawn from a vein in the arm.
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