Guttural pouch hemorrhage associated with lesions of the maxillary artery in two horses.

The research article discusses two cases where horses suffered from guttural pouch hemorrhage, possibly due to lesions in the maxillary artery, and outlines the treatment methods and postoperative complications.

Cases Overview

• The study focuses on two horses, both two-year-old geldings, presenting with guttural pouch hemorrhage, a rare condition associated with potentially fatal bleeding.
• In both cases, endoscopic examination resulted in detecting guttural pouch mycosis – a fungal infection of the guttural pouches.

Treatment Measures

• Both horses underwent surgery wherein the internal and external carotid arteries were ligated (closed off) to stop the bleeding.
• Following this, they received topical antifungal therapy to treat the mycosis.
• The horses’ conditions were kept under observation for a month postoperatively.

Postoperative Complications

• In the case of the Thoroughbred horse, despite the treatments, it was returned and had to be euthanized due to recurrent epistaxis (nosebleed). The necropsy (animal autopsy) revealed a bacterial infection in the guttural pouch, maxillary artery ulceration, and related hemorrhage.
• The Grade gelding also suffered complications postoperatively and started bleeding from a lesion located in the maxillary artery. Initial treatment was successful in achieving hemostasis (stopping of blood flow), but it later developed a bleeding lesion in another artery.

Discussion

• The article uses these cases to discuss the rationale behind the surgical intervention that was applied to prevent epistaxis associated with guttural pouch mycosis. It emphasizes the high risks surrounding the condition and the challenges in managing such complicated cases.
• The paper also suggests further exploration of potential reasons for the recurrent nosebleeds following surgery – postsurgical epistaxis. These could either be directly related to the surgery or might be due to simultaneous issues like bacterial infection as was found in the thoroughbred horse.

In conclusion, this research not only presents the detailed medical interventions in two interesting cases, but it also highlights the need for a deeper understanding of the causes and treatment options for conditions like guttural pouch hemorrhage in horses.