Partial Thromboplastin Time (PTT), Activated

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Partial Thromboplastin Time (PTT), Activated

The PTT test is ordered when someone has unexplained bleeding or clotting. Along with the PT (which evaluates the extrinsic and common pathways of the coagulation cascade), the PTT is often used as a starting place when investigating the cause of a bleeding.

Preparation: No special preparation is needed. Fasting is not required for this blood test. In general, being well hydrated (drinking plenty of water before the blood draw) will help make your veins somewhat easier to locate and access for the blood draw.

For more Information on any of your lab test results:

  • Consult your physician
  • Review the information on the independent, non-profit web site: labtestsonline.org.

These are not intended as diagnostic comments, but only to give you sufficient information for further discussion with your physician. It is important that you promptly consult your physician regarding any abnormal findings.

code 005207

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