Prothrombin Time With INR, Sodium Citrate Whole Blood

A prothrombin time (PT) is a test used to detect and diagnose a bleeding disorder or excessive clotting disorder. The international normalized ratio (INR) is calculated from a PT result and is used to monitor how well an anticoagulant is working to prevent blood clots.

When there is prolonged bleeding or inappropriate clotting disorder, when there is intake of warfarin.