What Do Your PT, PTT and INR results mean?What do my blood tests mean?
What are PT, PTT and INR blood tests? Before you have surgery your doctor may order blood tests to determine how quickly your blood clots. This group of tests is known as a coagulation study, individually these tests are commonly referred to as a PT (Prothrombin Time), PTT(Partial Thromboplastin Time), and INR (International Normalized Ratio). During some surgeries it is important that the blood not clot as quickly as normal, and medications may be given to slow the clotting time. Drugs commonly used to slow clotting have a variety of names, but Heparin, Coumadin, Lovenox and Warfarin are among the most common. In other cases, the patient may not clot quickly enough, and steps may be taken to make the blood to clot more quickly. Prothrombin Time Blood Test-PT This test is done to evaluate the blood for its ability to clot. It is often done before surgery to evaluate how likely the patient is to have a bleeding or clotting problem during or after surgery. Normal PT Values: 10-12 seconds
