A Prolonged PTT Is Corrected When Mixed with Normal Plasma

question 17

Multiple Choice

A prolonged PTT is corrected when mixed with normal plasma and tested immediately and after a 2-hour incubation. Which test (or tests) should be performed next?

• A) Bethesda titer
• B) High phospholipid PTT
• C) Anti-Xa assay
• D) Factor VIII and IX assays

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Definitions:

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A logical process in which a conclusion is based on the concordance of multiple premises that are generally assumed to be true.

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