Partial thromboplastin time (PTT)

Partial Thromboplastin Time (PTT)

The partial thromboplastin time (PTT) is a test that measures how long it takes for blood clotting proteins to form a clot. It is often used to diagnose and manage various blood clotting issues.

Preparation for the Partial Thromboplastin Time Test

Typically, no special preparation is necessary for the partial thromboplastin time test.

Procedure for the Partial Thromboplastin Time Test

The partial thromboplastin time test is typically done using a small sample of blood. The needles used for drawing blood are typically very thin and cause less pain or discomfort than those used for drawing larger samples.

It is important to note that the test is typically conducted in a laboratory and is not an at-home test.

Types of Partial Thromboplastin Time Tests

There are several types of partial thromboplastin time tests available, including the chromogenic PTT, the latex PTT, and the Activated Partial Thromboplastin Time (APTT).

Risks of the Partial Thromboplastin Time Test

The partial thromboplastin time test is a very safe procedure with few risks. The most common risk associated with the test is a small bruise or slight discomfort at the site of the needle injection.

It is important to note that the partial thromboplastin time test should not be used as a stand-alone test for diagnosing blood clotting disorders.

When is the Partial Thromboplastin Time Test Performed?

The partial thromboplastin time test is typically performed when a patient shows signs and symptoms of a blood clotting disorder. This can include bleeding or bruising that occurs spontaneously or for no apparent reason, heavy menstrual cycles, unusual bleeding after medical or dental procedures, or an unexplained increase in bleeding in patients with existing clotting disorders.

The partial thromboplastin time test may also be used to monitor patients who are taking medications that can affect blood clotting, such as warfarin or heparin.