03/22/2023
Von Willebrand’s Disease
Von Willebrand’s Disease (VWD) is a genetic blood disorder often seen in Toy Poodles. The condition causes a deficiency in a protein called the von Willebrand factor, which is necessary for platelets to stick together and form a clot. In dogs that are deficient in this protein, the blood may have difficulty clotting, which can lead to bleeding from the nose, v***a, bladder, or gums. Additionally, dogs with this condition may bleed for a long time after trauma or surgery.
If there is concern about VWD, a screening test may be performed. This test measures how long it takes for a small cut in the mouth to stop bleeding. If the time is longer than usual, additional testing is needed to confirm VWD.
Because some dogs with VWD do not have notably prolonged bleeding until later in adulthood, blood levels of von Willebrand factor can be measured to help with diagnosis. Most veterinarians recommend testing for VWD prior to any planned surgery, including spays, neuters, and dewclaw removals.