The normal human PT, also known as the plasma prothrombin time, is between 11-13 seconds, and is considered abnormal if it exceeds the normal control value by more than 3 seconds. increased PT values are most often seen in patients with congenital reductions in coagulation factors, such as hemophilia, and in patients with acquired coagulation factor deficiencies, which occur mainly in patients with poor liver function due to hepatitis, poor liver function due to other liver diseases, or liver failure. In addition, the PT time can be prolonged in some patients with diffuse intravascular hemolysis and in patients with vitamin K deficiency. If the PT time is prolonged, the patient needs to have further blood tests for liver function to see if glutathione aminotransferase and glutamic oxalacetic aminotransferase are normal. If the liver function is abnormal, the first thing to do is to actively treat the liver and transfuse plasma and albumin for supportive treatment.