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Prothrombin Time (Clotting Test)

The Activated Partial Thromboplastin Time (aPTT) measures the body’s Ability To Form Blood Clots appropriately.

Test Details

By measuring the amount of time the body takes to form a blood clot in a test tube, the aPTT test can determine the amount and the function of certain coagulation factors.  For people who are at increased risk of blood clots that can cause stroke or heart attack, Heparin, an anti-coagulant is sometimes prescribed.  While on Heparin therapy it is important to monitor both the effectiveness of the therapy and to ensure that the body is still able to properly form blood clots.

If you experiencing unexplained bruising or bleeding, have developed a thromboembolism (clot that has broken free and is moving through the veins), have an acute condition that may cause bleeding and the clots to be used too quickly, or chronic liver disease this test will help to determine the cause allowing treatment to prevent life threatening bleeding events.  This test may also be used prior to surgery to determine a patient’s bleeding tendencies so that surgical staff is prepared for the possibility of increased blood loss or if the patient has a history of history of frequent or excessive bleeding.

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Am I required to fast?

No, fasting is not required. There are no dietary or medicinal restrictions to take this test.

Is a doctor's order required?

No. You do not need to provide a doctor’s order to get lab testing done at Any Lab Test Now.

Do I need to make an appointment?

No. You can walk in for same day testing. We make it easy for you by offering work-friendly hours.

If I have questions about my tests results who should I contact?

We recommend you share your results with your physician.