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What is a VON-WILLEBRAND FACTOR ANTIGEN (WFAg)?

Von Willebrand Factor Antigen (WFAg) is a blood test that measures the amount of von Willebrand factor, a protein essential for normal blood clotting. It is done to help diagnose von Willebrand disease and other bleeding disorders, especially in people who bruise easily, have frequent nosebleeds, heavy menstrual bleeding, or prolonged bleeding after injury or surgery.

Additional Information

Also known as/ Other names: Von Willebrand Factor Antigen Test, VWF Antigen Assay, Von Willebrand Antigen Level
Parameters: 1
Recommended for: M/F/Others
Sample Type: Blood
Patient Preparation: Overnight fasting is preferred.
Reports: 2 days

FAQs

What is von Willebrand factor?

It is a protein that helps platelets stick together and form blood clots.

What conditions can this test help detect?

It can help detect von Willebrand disease and some other bleeding disorders.

What does a low result mean?

A low level may suggest von Willebrand disease or another bleeding disorder.

What does a high result mean?

A high level may occur with stress, inflammation, pregnancy, or other conditions.

Can this test be done before surgery?

Yes, if a bleeding disorder is suspected or there is a history of excessive bleeding.

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