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Blood clot formation
Blood clot formation


Blood clots
Blood clots


Von Willebrand disease

Definition:

Von Willebrand disease is the most common hereditary bleeding disorder .



Causes:

Von Willebrand disease is caused by a deficiency of von Willebrand factor. Von Willebrand factor helps blood platelets clump together and stick to the blood vessel wall, which is necessary for normal blood clotting. There are several types of Von Willebrand disease.

A family history of a bleeding disorder is the primary risk factor.



Symptoms:

Note: Most women with heavy or prolonged menstrual bleeding do not have Von Willebrand disease.



Exams and Tests:

Von Willebrand disease may be hard to diagnose. Low von Willebrand factor levels and bleeding do not always mean you have von Willebrand disease.

Tests that may be done to diagnose this disease include:

  • Bleeding time
  • Blood typing
  • Factor VIII level
  • Platelet function analysis
  • Platelet count
  • Ristocetin cofactor test
  • Von Willebrand factor specific tests


Treatment:

Treatment may include DDAVP (desamino-8-arginine vasopressin), a medicine to raise von Willebrand factor level and reduce the chances for bleeding.

However, DDAVP does not work for all types of von Willebrand disease. Tests should be done to determine what type of von Willebrand you have. If you are going to have surgery, your doctor may give you DDAVP before surgery to see if your von Willebrand factor levels increase.

The drug Alphanate (antihemophilic factor) is approved to decrease bleeding in patients with the disease who must have surgery or any other invasive procedure.

Blood plasma or certain factor VIII preparations may also be used to decrease bleeding.



Outlook (Prognosis):

Bleeding may decrease during pregnancy. Women who have this condition usually do not have excessive bleeding during childbirth.

This disease is passed down through families. Genetic counseling may help prospective parents understand the risk to their children.



Possible Complications:

Bleeding may occur after surgery or when you have a tooth pulled.

Aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs) can make this condition worse. Do not take these medicines without first talking to your doctor or nurse.



When to Contact a Medical Professional:

Call your health care provider if bleeding occurs without reason.

If you have von Willebrand disease and are scheduled for surgery or are in an accident, be sure you or your family notify the health care providers about your condition.



References:

Kessler CM. Hemorrhagic disorders: coagulation factor deficiencies. In: Goldman L, Ausiello D, eds. Goldman's Cecil Medicine. 23rd ed. Philadelphia, PA: Saunders Elsevier; 2007:chap 180.




Review Date: 2/24/2014
Reviewed By: Todd Gersten, MD, Hematology/Oncology, Florida Cancer Specialists & Research Institute, Wellington, FL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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Atlantic Medical Group
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Morristown Medical Center

100 Madison Avenue
Morristown, NJ 07960
973-971-5000

Overlook Medical Center

99 Beauvoir Avenue
Summit, NJ 07901
908-522-2000

Newton Medical Center

175 High Street
Newton, NJ 07860
973-383-2121

Chilton Medical Center

97 West Parkway
Pompton Plains, NJ 07444
973-831-5000

Goryeb Children's Hospital

100 Madison Avenue
Morristown, NJ 07960
973-971-5000

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