A member asked:

I had an aptt of 36.5, a aptt 1:1 np of 33.3, and a prothrombin time of 13.5. all are listed under high but my doctor is not concerned? is this ok?

A doctor has provided 1 answer
Dr. Michael Thompson answered

Specializes in Hematology and Oncology

Normal range?: More information is needed including the "normal range" of the tests. Why were the tests ordered? However the elevated aptt corrects with mixing with normal blood (1:1 mix) suggesting a coagulation factor deficiency. Consider repeat testing and asking for more information about cause. Your doctor may seek the opinion of a hematologist.

Answered 5/18/2013

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