Coagulation tests are used to evaluate and diagnose bleeding problems. They are also used to monitor people taking warfarin or other anticoagulants. There are many different coagulation tests, and the choice depends on the circumstances and suspected problem.

The INR test is a blood test related to the blood clotting process. INR stands for International Normalized Ratio - a test that evaluates the level of blood clotting, indicating the clotting time of the patient being tested.