Why is repeating tests needed to confirm the diagnosis of 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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Repeating tests at intervals of more than 2 weeks is advisable to confirm or definitively exclude the diagnosis of vWD. Optimally, testing should occur at a time remote from events that may raise vWF levels, such as pregnancy, infection, surgery, and strenuous exercise.

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