von Willebrand Factor Antigen details
What von Willebrand Factor Antigen shows
Von Willebrand factor is a protein in blood that helps platelets stick to damaged blood vessels and carries clotting factor VIII. This test measures how much of the protein is present, not how well it works. It is used when you have easy bruising, nosebleeds, heavy periods or bleeding after procedures. A lower result can point to von Willebrand disease, the most common inherited bleeding disorder. Levels are naturally lower in people with blood group O and rise with stress, exercise, pregnancy, inflammation and estrogen, which can mask a low level. Results are interpreted with von Willebrand factor activity and factor VIII, often with repeat testing.
Tests that include von Willebrand Factor Antigen
von Willebrand Disease is the most common hereditary bleeding disorder; it may also be acquired. von Willebrand Factor is necessary for platelet adhesion to injured endothelium. von Willebrand Factor Antigen is useful in assessing the quantity of von Willebrand Factor. When combined with other tests, results are useful in categorizing the type of von Willebrand Disease.
- von Willebrand Factor Antigen Measures the amount of von Willebrand factor protein in your plasma, used to look into bleeding problems such as von Willebrand disease.
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