Which prothrombin time (PT) test results suggest von Willebrand disease (vWD)?

Updated: Dec 30, 2019
  • Author: Eleanor S Pollak, MD; Chief Editor: Srikanth Nagalla, MBBS, MS, FACP  more...
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The PT should be within reference ranges. Prolongations of both the PT and the aPTT signal a problem with acquisition of a proper specimen or the presence of a disorder other than or in addition to vWD.

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