Enterotomy / Intestinal Resection

Intestinal surgery is recommended when the bowel cannot heal or function without surgical correction. The most common reasons in dogs and cats:

• Foreign body obstruction — fabric, string, bones, fruit pits, toys, or any object that lodges in the small intestine and causes a blockage (obstructed pets vomit repeatedly and deteriorate without treatment)
• Linear foreign bodies — thread, string, or ribbon caught at the base of the tongue or pylorus that pleats the intestine as peristalsis tries to move it; these are particularly dangerous in cats
• Intestinal neoplasia — adenocarcinoma, lymphoma, leiomyoma, and carcinoid tumors that obstruct or perforate the bowel
• Intestinal intussusception — telescoping of one segment of bowel into another, which cuts off blood supply and requires resection when manual reduction fails or tissue is not viable
• Mesenteric volvulus — twisting of the intestinal mesentery causing catastrophic ischemia; a rare but rapidly fatal emergency
• Full-thickness biopsy needed to distinguish high-grade lymphoma from adenocarcinoma when endoscopic biopsies are inconclusive

Intestinal surgery is performed under general anesthesia with meticulous contamination control — intestinal contents are bacteria-laden, and preventing spillage into the abdomen is paramount:

• A midline abdominal incision provides access to the full length of intestine; the abdomen is explored systematically from stomach to colon
• The obstructed or diseased segment is identified and isolated from the rest of the abdomen using moistened sponges
• For enterotomy: a small incision is made in a healthy section of intestine near (but not at) the obstruction; the foreign object is milked to the incision and removed; the incision is closed with a two-layer absorbable suture technique
• For resection and anastomosis: the diseased intestinal segment is removed by dividing the intestine and its mesenteric blood supply on either side of the disease; the two healthy cut ends are joined with careful, precise suturing or surgical stapling; the anastomosis (connection) is checked for leaks
• The whole abdomen is lavaged and closed in layers; antibiotics are given throughout

The bowel has significant capacity to function normally after removal of moderate lengths — short bowel syndrome requiring long-term dietary management is uncommon unless very long segments must be removed.

Pre-operative preparation for intestinal surgery balances urgency with safety:

• Blood panel including complete blood count, chemistry, and electrolytes — vomiting pets are often dehydrated and hypokalemic (low potassium); these must be corrected before anesthesia
• Abdominal radiographs (X-rays) often show the obstruction, gas patterns indicating ileus (stopped bowel), or free abdominal gas (which means perforation has already occurred)
• Abdominal ultrasound refines the location, helps identify the cause, and assesses whether intussusception or masses are present
• IV fluids and electrolyte replacement begin immediately; IV antibiotics are given before surgery
• Chest X-rays when neoplasia is suspected to screen for spread
• For true emergencies (perforation, devitalized bowel, septic peritonitis), stabilization and surgery must happen in parallel — delay worsens outcome

Intestinal surgery requires a careful feeding protocol and close monitoring because the anastomosis (the bowel connection) needs time to heal securely:

• Hospitalization (1–3 days): IV fluids and electrolytes, pain management, anti-nausea medications, and IV antibiotics; the team monitors for fever, abdominal pain, or deterioration that could signal leakage
• Feeding protocol: water in small amounts begins 6 to 12 hours after surgery; a small amount of soft, bland food (boiled chicken and rice, or a veterinary GI diet) is offered the following morning; portions increase gradually over five to seven days
• Days 3–14 at home: multiple small meals daily, restricted activity, leash walks only; loose stools or diarrhea for a few days is common and expected as the gut re-establishes normal flora
• Week 2 recheck: incision evaluation and assessment of appetite, energy, and stool quality
• Weeks 3–4: gradual return to a full, regular diet and normal activity in uncomplicated cases

For neoplasia cases, pathology results guide whether further treatment such as chemotherapy is indicated. Lymphoma in cats, for example, often responds well to chemotherapy even after surgical resection.

Intestinal surgery carries risks proportional to the disease severity at the time of surgery:

• Anastomotic leakage — separation or breakdown of the intestinal closure is the most feared complication; it is uncommon with proper technique but warrants close monitoring in the first 72 hours
• Septic peritonitis — bacterial contamination of the abdomen, whether from pre-existing perforation or intraoperative spillage; treated with thorough lavage, drainage, and antibiotics
• Short bowel syndrome — if a very long segment must be removed, the remaining bowel may have difficulty absorbing nutrients; most routine resections do not remove enough intestine to cause this
• Ileus (bowel paralysis) — the gut may be slow to restart after surgery, causing nausea and delayed appetite; usually temporary and managed with medication
• Stricture at the anastomosis — rare narrowing of the reconnection site that can cause re-obstruction over weeks to months

Outcomes are best when surgery is performed before intestinal necrosis or perforation has occurred — this is why prompt evaluation of a vomiting pet that cannot keep food down is strongly encouraged. What starts as a simple foreign body can become a much more serious problem with each passing hour.