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What is the difference between pt and ptt partial thromboplastin time?

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Dr. Gurmukh Singh
Pathology

In brief: Two pathways

The process of coagulation follows two pathways, and pt measures the constituents of the extrinsic pathway and PTT measure the constituents of intrinsic pathway.
There is a common final pathway for both sides. The tests help in diagnosing the type of coagulation abnormality, e.g., pt is prolonged on treatment with coumadin/warfarin and PTT is prolonged with heparin.

In brief: Two pathways

The process of coagulation follows two pathways, and pt measures the constituents of the extrinsic pathway and PTT measure the constituents of intrinsic pathway.
There is a common final pathway for both sides. The tests help in diagnosing the type of coagulation abnormality, e.g., pt is prolonged on treatment with coumadin/warfarin and PTT is prolonged with heparin.
Dr. Gurmukh Singh
Dr. Gurmukh Singh
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