What Is PTT?


Quick Answer

PTT stands for partial thromboplastin time, which is a blood test that calculates the time it takes for a patient’s blood to clot, says WebMD. Partial thromboplastin time is performed to determine the reason for abnormal bleeding, to evaluate how the liver is functioning, and to discover blood clotting issues.

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Full Answer

The PTT uses a needle to take a sample of blood, and the patient may receive a bandage to stop any bleeding, says MedlinePlus. Prothrombin time, or PT, is also a test that measures the time for blood to clot. It is normally performed at the same time as a PTT. Blood thinners may affect the time it takes for blood to clot, says WebMD.

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