Von Willebrand's Disease

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:

• 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 identify 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.

Go to previous section	Go to top of page	Go to next section
Author:	Robin Parks, MS	Last Updated: November 24, 2008
Medical Review:	Anne C. Poinier, MD - Internal Medicine Joseph O'Donnell, MD - Hematology/Oncology
© 1995-2009 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.This information does not replace the advice of a doctor. Healthwise disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.