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   Do you need a sample for a von Willebrand factor test?

   • Sample Required? Test Preparation Needed? Von Willebrand factor (vWF) is one of several proteins in the body's blood clotting system that work together, and in sequence, to stop bleeding. Von Willebrand factor tests help investigate excessive bleeding.

   von Willebrand Factor - Understand the Test - Testing.com

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   Does von Willebrand factor work?

   • People with this type have low levels of von Willebrand factor in their blood. They may not have symptoms. If they have symptoms, those symptoms are mild. Type 2: In this case, von Willebrand factor doesn’t work as it should. People with this type may have mild or moderate bleeding.

   von Willebrand Disease: What It Is, Types, Symptoms & Treatment

   my.clevelandclinic.org/health/diseases/17709-von-willebrand-disease

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   Why do you need a blood test for von Willebrand disease?

   • To help determine the cause of unexplained excessive or repeated episodes of bleeding, to diagnose von Willebrand disease (VWD), and to distinguish between different types of VWD When To Get Tested?

   von Willebrand Factor - Understand the Test - Testing.com

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2. www.testing.com › tests › von-willebrand-factorvon Willebrand Factor - Understand the Test - Testing.com

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   Dec 22, 2018 · Von Willebrand factor (VWF) testing is used to investigate excessive or recurrent bleeding episodes or a personal or family history of excessive bleeding. Testing is used to help diagnose von Willebrand disease (VWD) and distinguish between the various types of VWD.

3. www.uptodate.com › contents › von-willebrand-diseasePatient education: von Willebrand disease (Beyond the Basics)

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   Apr 16, 2024 · The only way to know if DDAVP will work for you is to do a test after your diagnosis is established and when you are not bleeding or otherwise sick. During the test, you are given a dose of DDAVP and your blood is checked before and after the dose to see if your VWF and factor VIII levels increase sufficiently, usually into the normal range.

4. my.clevelandclinic.org › health › diseasesvon Willebrand Disease: What It Is, Types, Symptoms & Treatment

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   Jun 22, 2022 · von Willebrand factor multimers: This test measures the factor’s structure. Your healthcare provider may need to do several blood tests to confirm you have von Willebrand disease. That’s because factors, including hormone levels, may change your von Willebrand factor blood levels may change.

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6. www.hematology.org › - › mediaDiagnosis and Management of von Willebrand Disease

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   Diagnose the patient with type 1 VWD and send targeted genetic testing. The panel recommends a VWF level of <0.30 IU/mL regardless of bleeding, and in patients with abnormal bleeding, a VWF level of <0.50 IU/mL to confirm the diagnosis of type 1 VWD (Strong recommendation, low certainty).

7. www.medicalnewstoday.com › articles › von-willebrandWhat tests can help diagnose von Willebrand disease?

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   Nov 22, 2023 · VWF multimers. Platelet aggregation. Factor VIII. Summary. To help diagnose von Willebrand disease or other bleeding disorders, a doctor will request various blood tests. These tests will...

8. www.hog.org › handbook › articleTesting for VWD > von Willebrand Disease > The Basics > HoG ...

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   Von Willebrand Factor Multimers – This test measures the different parts of the VWF protein. This can help determine which type of VWD someone has. It is typically done only after someone is confirmed to have VWD. Factor VIII level – This test measures how much factor VIII is in the blood.

9. www.cdc.gov › von-willebrand › aboutAbout von Willebrand Disease | Von Willebrand Disease (VWD) | CDC

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   Feb 14, 2024 · What it is. Von Willebrand disease (VWD) is a blood disorder in which the blood does not clot properly. Blood contains many proteins that help the blood clot when needed. One of these proteins is called von Willebrand factor (VWF). People with VWD either have a low level of VWF in their blood or the VWF protein doesn't work the way it should.