Delayed Postoperative Bleeding in Dogs

Category: Blood
Inheritance: Autosomal dominant, incomplete penetrance
Breeds documented: 1
Published sources: 2

Overview

Bleeding can begin after an apparently normal operation, even when clots form initially. In delayed postoperative bleeding, those clots may break down too quickly, allowing bleeding to start again. Bruising may spread around the surgical wound or farther across the body, and some bleeding can be internal. This can become life-threatening. Routine blood-clotting tests may be normal, so they do not reliably exclude the disorder.

Signs to watch for

Bruising that spreads beyond the surgical wound
Blood seeping from the surgical wound
Sudden collapse after surgery

Bleeding can start hours to days after surgery or an injury.

Emergency Go to an emergency vet now for unexpected bleeding after surgery.

Diagnosis and tests

Vets assess the bleeding pattern and investigate other possible causes. Standard clotting tests and platelet counts may be normal, while specialized clot testing may reveal unusually rapid clot breakdown. The DEPOHGEN DNA test checks for a SERPINF2 variant associated with inherited risk, rather than excluding every cause of surgical bleeding.

Breeds with documented risk

1 breed

By breed size

1 Large

GreyhoundLarge · Hound Group

Inheritance

Autosomal dominant, incomplete penetrance
Scottish Deerhound
One copy can be enough, but not every dog with the variant develops the condition, and severity can vary. A DNA result shows risk, not certainty.
As stated by OMIA

We've gathered what published sources say about this condition, so you can talk it through with your vet. It isn't veterinary advice: you and your vet know your dog best.