It's often used with other tests that monitor clotting factors. Blood clots form in a specific series of steps called a pathway. This test mainly looks at how both the intrinsic clotting pathway and the common final pathway are working. You may need this test if your healthcare provider believes that you have a problem with 1 or more clotting factors. If you have a bleeding disorder such as von Willebrand disease or another disease that prevents your blood from clotting, this test can help find out where the problem is.
This test is also used to monitor people who are getting heparin therapy. Heparin is a blood thinner used to prevent dangerous blood clots. Depending on why you are having this test, you may have other blood tests that help measure how well your blood is clotting.
Some of these tests might include:. Test results may vary depending on your age, gender, health history, the method used for the test, and other things.
Your test results may not mean you have a problem. Ask your healthcare provider what your test results mean for you. Test results are measured in seconds of time. Your results will show how long your blood took to clot, and will often compare them with results from a normal sample tested at the same time.
A normal range is around 21 to 35 seconds. The wide range of possible causes for abnormal results means that this test alone is not enough to determine what condition you have. An abnormal result will probably prompt your doctor to order more tests. Testing can help assess your risk of excessive bleeding or developing….
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Some people may experience severe bleeding, while…. If left untreated, a blood clot can reach your organs and cause potentially life threatening conditions, such as pulmonary embolism, stroke, or a…. Bleeding diathesis means a tendency to bleed or bruise easily.
Bleeding disorders often occur when blood doesn't clot properly. Learn about common…. Find out what to do in case of hemorrhage, or bleeding. Discover how to recognize a medical emergency, the complications, and more. Anticoagulants and antiplatelet drugs are a type of medication that is used to eliminate or reduce the risk of blood clots by helping prevent or break…. Lead in water pipes can cause a number of long lasting health effects, and experts say children are particularly vulnerable to them.
Health Conditions Discover Plan Connect. Medically reviewed by Deborah Weatherspoon, Ph. Why do I need a PTT test? How do I prepare for a PTT test? What are the risks associated with a PTT test? Have had multiple miscarriages Are taking heparin.
What happens during a PTT test? Will I need to do anything to prepare for the test? You don't need any special preparations for a PTT test. Are there any risks to the test? What do the results mean? If your results show that your blood took a longer-than-normal time to clot, it may mean you have: A bleeding disorder, such as hemophilia or von Willebrand disease. Von Willebrand disease is the most common bleeding disorder, but it usually causes milder symptoms than other bleeding disorders.
Liver disease Antiphospholipid antibody syndrome or lupus anticoagulant syndrome. These are autoimmune diseases that cause your immune system to attack your coagulation factors. Vitamin K deficiency. Vitamin K plays an important role in forming coagulation factors. Is there anything else I need to know about a PTT test? References American Society of Hematology [Internet]. Washington D.
Bleeding Disorders; [cited Aug 26]; [about 2 screens]. Atlanta: U. Bleeding Disorders; [cited Aug 26]; [about 3 screens].
Partial Thromboplastin Time; [updated Mar 27; cited Aug 26]; [about 2 screens]. Mayo Foundation for Medical Education and Research; c— Bethesda MD : U.
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