Von Willebrand's Disease

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Exams and Tests

Von Willebrand's disease can be hard to diagnose. If you have symptoms that suggest a blood clotting disorder, such as frequent nosebleeds, easy bruising, or heavy menstrual periods, a doctor will take a blood sample and have it tested in a lab.

Tests for von Willebrand's disease may measure:

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Von Willebrand factor antigen.
Bleeding time.
Von Willebrand factor activity levels, using a test such as PTT (partial thromboplastin time).

Early diagnosis of mild von Willebrand's disease allows doctors to know when you may need special treatment in order to help prevent severe bleeding problems. A definite diagnosis of von Willebrand's disease depends on:

A finding of low levels of von Willebrand factor in your blood on more than one occasion.
A history of excessive bleeding.
Genetic testing. It can show a defect in your von Willebrand factor and what type or subtype of von Willebrand's disease you have.

If you have von Willebrand's disease, your doctor may suggest that your family members get tested for it too.

WebMD Medical Reference from Healthwise

Last Updated: November 22, 2010

This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.