What is it used for?A PTT test is used to:Check the function of specific coagulation factors. If any of these factors are missing or defective, it can mean you have a bleeding disorder. Bleeding disorders are a group of rare conditions in which blood doesn't clot normally. The most well-known bleeding disorder is hemophilia.Find out if there is another reason for excessive bleeding or other clotting problems. These include certain autoimmune diseases that cause the immune system to attack coagulation factors.Monitor people taking heparin, a type of medicine that prevents clotting. In some bleeding disorders, the blood clots too much, rather than too little. This can cause heart attacks, strokes, and other life-threatening conditions. But taking too much heparin can cause excessive and dangerous bleeding.
