Prothrombin Time (PT) and Partial Thromboplastin Time (PTT)


[PT and PTT] Includes Activated partial thromboplastin time, prothrombin time, and international normalized ratio.

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Markers reported include:

  • Activated partial thromboplastin time (aPTT);
  • International normalized ratio (INR);
  • Prothrombin time (PT)

Also known as:

  • Activated Partial Thromboplastin Time (aPTT) and Prothrombin Time (PT)
  • PT and aPTT
  • PT and PTT

Turnaround time: Expected turnaround is within one day, although this may vary depending on other tests ordered for the same blood draw, and expected variation with testing.