The partial thromboplastin time (PTT) or activated partial thromboplastin time (aPTT) is a commonly performed test for the system of coagulation, especially its intrinsic pathway. Apart from detecting abnormalities in blood clotting, it is also used to monitor the effectivity of treatment with heparin, a major anticoagulant.

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... Why get tested?
As part of an investigation of a bleeding or thrombotic episode. To help evaluate your risk of excessive bleeding prior to a surgical procedure. To monitor heparin anticoagulant therapy.

When to get tested?
When you have unexplained bleeding or blood clotting. When you are on heparin anticoagulant therapy. Sometimes as part of a pre-surgical screen.

Sample required?
A blood sample is drawn by needle from a vein in the arm.
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Lab Tests Online - more...

The partial thromboplastin time (PTT) or activated partial thromboplastin ti ...
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Resources

  • aPTT (Lab Tests Online)