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Ileus in Cats

The term ileus (functional or paralytic) is used to denote temporary and reversible blockages in the intestines due to the absence of bowel motility. This absence of normal intestinal movements (or peristalsis) results in accumulation of intestinal contents in certain areas of intestine. It should be remembered that ileus itself is not a primary disease in cats, but a complication seen due to some other disease or condition affecting normal motility of the intestines.

Symptoms and Types

• Loss of appetite (anorexia)
• Vomiting
• Depression
• Mild abdominal distention or discomfort due to gas accumulation due to obstruction

Causes

• After gastrointestinal surgery
• Electrolyte imbalances
• Infections and inflammatory diseases of gastrointestinal tract
• Persisting mechanical obstruction (e.g., foreign body in GI tract)
• Blockages of blood supply to intestine or part of intestine
• Septicemia (body wide illness due to presence of bacteria in blood) due to gram negative bacteria
• Shock
• Abdominal injury
• Distention of intestines due to aerophagia or excessive burping or belching
• After use of certain drugs
• Toxicity (e.g., lead)

Diagnosis

After recording a detailed history and performing a complete physical examination, routine laboratory tests will be conducted. These tests include complete blood count, biochemistry profile, and urinalysis. The main objective of the diagnostic effort is to find the underlying cause of this problem. Results of routine laboratory testing may reveal some information related to the underlying disease. Abdominal X-rays and ultrasound will help in finding various abnormalities including: presence of gas, fluid, mechanical obstruction (e.g., foreign body), tumor in abdomen, and other such conditions.

For confirmation, your veterinarian may use more specific testing like Barium-Impregnated Polyethylene Spheres (BIPS). Barium is a chemical used in certain radiological studies to enhance visualization of anatomical structures. BIPS are markers given orally and will demonstrate the extent of intestinal obstruction and motility disorder. Your veterinarian will assess the time it takes for these markers to move along the intestines and how much delay is involved. This test also helps in the localization of the anatomical site involved.

Endoscopy is also an option for diagnosis, especially for an assessment of mechanical obstruction. Your veterinarian will look directly into the stomach and intestine using an instrument called an endoscope. A rigid or flexible tube will be inserted into your cat’s stomach, where your veterinarian will be able to visually inspect and take pictures. In some cases, exploratory surgery may need to be performed to rule out mechanical obstruction. X-ray, computed tomography scan, magnetic imaging test, and analysis of cerebrospinal fluid (fluid circulate around brain and spinal cord) may be required in patients in whom spinal cord injury is suspected.