Von Willebrand Factor, Plasma Test
- Category
- Blood Clotting
- Sample
- Blood sample taken from a vein in your arm
- Reports () Terms & Conditions Report time varies with time of sample collection.
- In 9 days
- Fasting
- No Fasting
- Age
- 5+ Years
What Is This Test?
Measures von Willebrand factor, a protein that helps platelets stick to damaged blood vessels and carries Factor VIII.
Why this test is performed?
Diagnoses von Willebrand disease, the most common inherited bleeding disorder, in people with easy bruising, nosebleeds or heavy periods.
Who should take this test?
Easy bruising or bleeding, heavy periods, blood clots, before surgery, or people taking blood thinners.
Test Preparation
No fasting needed.
Medical disclaimer · for information only, not medical advice
This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.
In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.
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- Report time: In 2 days
- No fasting
- Report time: In 3 days
- No fasting
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Frequently asked questions
Yes — levels rise with stress, exercise, pregnancy and inflammation, so repeat testing may be needed.
No fasting is needed. You can eat and drink normally unless your doctor has advised otherwise.
Blood sample taken from a vein in your arm.
Usually within 7–8 days after the sample reaches the lab. You will receive the report online.
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