Von Willebrand Disease

TL;DR. Von Willebrand disease is an inherited bleeding disorder that impairs a pet's ability to form blood clots, making them highly vulnerable to excessive bleeding during surgery, injury, or teething.

Doberman Pinschers are genetically predisposed to von Willebrand disease.

Što je to?

To understand von Willebrand disease (vWD), it helps to understand how a healthy body stops bleeding. When a blood vessel is damaged, the body initiates a complex process called hemostasis. The very first step, known as primary hemostasis, involves platelets, which are tiny, specialized cell fragments circulating in the blood. These platelets must quickly rush to the injury site, stick to the damaged vessel wall, and clump together to form a temporary plug. However, platelets cannot stick to the

"Inheritance is autosomal dominant or recessive in type I but autosomal recessive in types II and III. No sex predilection has been found. Animals with vWD typically show mucosal bleeding..."

Uzroci i čimbenici rizika

Von Willebrand disease is an inherited genetic condition. It is caused by mutations in the gene responsible for producing the von Willebrand factor protein. Because it is a congenital defect, pets are born with the condition, and it persists throughout their entire lives. The mode of inheritance varies depending on the breed and the specific type of vWD. In many common breeds, the disease is inherited as an autosomal dominant trait with incomplete penetrance. Incomplete penetrance means that not

Znakovi

• Type 1: This is the most common and generally the mildest form. The vWF protein is structurally normal, but there is a quantitative reduction in the total amount circulating in the blood. Many dogs with Type 1 vWD live normal lives and may only show signs of excessive bleeding during surgery or major trauma.
• Type 2: This is a more severe, qualitative defect. While some vWF is present, the large, complex structures of the protein (called multimers) are missing or malformed. Because these large multimers are critical for effective clotting, pets with Type 2 vWD have a significant risk of severe bleeding.
• Type 3: This is the most severe form, characterized by an absolute absence of vWF altogether. Pets with Type 3 vWD cannot form primary platelet plugs at all, leading to frequent, severe, and often spontaneous bleeding episodes.
• Cryoprecipitate: This is a specialized blood product concentrated with large vWF multimers, fibrinogen, and factor VIII. It is the ideal transfusion product for vWD patients because it delivers a high concentration of the missing clotting factors in a small volume.
• Fresh Frozen Plasma (FFP): If cryoprecipitate is unavailable, fresh frozen plasma can be administered. FFP contains all clotting factors, including vWF, and helps restore normal hemostasis.
• Type 1 vWD: The prognosis is generally excellent. Because Type 1 is a mild to moderate deficiency, most affected dogs live full, active, and normal lives. With proactive veterinary care-such as pre-surgical screening, the use of desmopressin, and avoiding platelet-inhibiting drugs-the risk of serious bleeding complications is very low.

Kada veterinaru

If you own a breed predisposed to von Willebrand disease, or if your pet has been diagnosed with the condition, you must monitor them closely for any signs of bleeding. Contact your veterinarian if you notice: * Prolonged bleeding from the gums, especially during teething or after eating hard food. * Frequent or unexplained nosebleeds. * Blood in your pet's urine or stool. * Unusually heav

Dijagnostika

Diagnosing von Willebrand disease requires a systematic, step-by-step approach. Because the symptoms of vWD mimic other bleeding disorders, your vet must rule out other potential causes before confirming a diagnosis. The diagnostic process typically begins with a physical examination and a review of your pet's breed and family history. If your vet suspects a bleeding disorder, they will recommend

Liječenje

There is no permanent cure for von Willebrand disease, as the genetic defect cannot be corrected. However, the condition can be managed highly effectively, particularly when planning for surgical procedures or managing acute bleeding episodes. ### First-Line Medical Therapy: Desmopressin (DDAVP) Desmopressin is a synthetic hormonal agent and a vasopressin analogu

Prevencija i svakodnevica

Because von Willebrand disease is an inherited genetic disorder, it cannot be prevented through lifestyle changes, vaccines, or diet. The only way to prevent the disease is through responsible breeding practices. * Genetic Screening: Breeders of predisposed dog breeds should perform DNA testing on all potential breeding stock before mating. D

Izvori

Veterinary internal medicine references for this condition.

My highlights & notes

New note