Bilious vomiting syndrome

Bilious Vomiting Syndrome

Bilious Vomiting Syndrome (BVS) is a condition observed in dogs, characterized by the vomiting of bile, typically occurring in the early morning or late at night. This syndrome is often seen in otherwise healthy dogs and is believed to be caused by an accumulation of bile in the stomach, leading to irritation and subsequent vomiting.

Pathophysiology

Bile is a digestive fluid produced by the liver and stored in the gallbladder. It is released into the small intestine to aid in the digestion of fats. In some dogs, bile can reflux into the stomach, especially when the stomach is empty for prolonged periods. This can irritate the gastric mucosa, leading to vomiting. The vomitus is typically yellow or greenish in color due to the presence of bile.

Clinical Presentation

Dogs with Bilious Vomiting Syndrome often present with:

• Vomiting of yellow or greenish fluid, usually occurring in the early morning or late at night.
• Otherwise normal appetite and behavior.
• No significant weight loss or other systemic signs of illness.

Diagnosis

Diagnosis of BVS is primarily based on clinical history and ruling out other causes of vomiting. A thorough physical examination and diagnostic tests such as blood work, abdominal ultrasound, and endoscopy may be performed to exclude other gastrointestinal disorders.

Management

Management of Bilious Vomiting Syndrome typically involves dietary modifications and medical therapy:

• Dietary Changes: Feeding small, frequent meals throughout the day and providing a late-night snack can help prevent the stomach from being empty for long periods, reducing bile accumulation.
• Medical Therapy: Medications such as proton pump inhibitors (e.g., omeprazole) or H2 receptor antagonists (e.g., famotidine) may be prescribed to reduce gastric acidity and protect the gastric mucosa.

Prognosis

The prognosis for dogs with Bilious Vomiting Syndrome is generally good, especially with appropriate dietary management and medical treatment. Most dogs respond well to treatment and can lead normal, healthy lives.

Also see

• Gastritis
• Gastroesophageal reflux disease
• Canine digestive system