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A member asked:
What is the difference between pt, ptt, and inr tests?
A doctor has provided 1 answer
Blood coagulation: The pt and PTT labs measure components of the blood clotting cascade. Abnormalities of one or the other or both lead towards the type of clotting abnormality (extrinsic or intrinsic pathway abnormality). Inr is the international normalized ratio, a derived number based on pt to normalize a variation done in different labs or with different testing systems. It is used in patients on coumadin (warfarin).
Answered 7/3/2018
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