How should elevated PT of unclear etiology and significance be evaluated?

In the absence of concerning bleeding or thrombosis, family history of coagulopathy, current anticoagulant use, or malnutrition

Answer from: at Academic Institution

Mild prolongation of the prothrombin time (PT) may represent a normal ‘outlier’. If there is no obvious explanation for a moderate to marked prolongation of the PT (for example, anticoagulation therapy effect, liver disease, nutritional deficiency like vitamin K deficiency. then the next...

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at Lourdes Medical Center Burlington
Use a different reagent and/or perform Correction ...

Answer from: at Community Practice

I have seen a Quest lab result binormal at another Lab x2.

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How should elevated PT of unclear etiology and significance be evaluated?

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