Post-Ileostomy Abdominal Distension with Persistent Hiccups - Systematic Approach

• Heavy abdominal distension
• Persistent hiccups (phrenic nerve irritation from diaphragm elevation)
• Inability to pass stool (obstipation)
• No improvement with Ryle's tube (RT) and enema

Step 1: Immediate Assessment

A. Investigate the ileostomy itself

• Is there output from the ileostomy? Even minimal output?
  • Zero output = concerning for ileostomy obstruction/retraction or internal hernia
  • Normal small bowel function usually returns within a few hours post-op; at Day 7, the ileostomy should be functioning
• Examine the stoma: is it viable, prolapsed, retracted, stenosed?
• Inspect the peristomal area for hernia or adhesion band around the stoma exit

B. Urgent investigations (if not already done)

1. CECT Abdomen (CT with oral ± IV contrast) - This is the KEY investigation
   • CT has 100% sensitivity and specificity in differentiating early postoperative mechanical obstruction from paralytic ileus (Maingot's Abdominal Operations)
   • Look for: transition point, dilated proximal + collapsed distal loops (defines mechanical), free gas, peritoneal collection
2. Plain X-ray abdomen (erect + supine) - Quick, bedside; look for air-fluid levels, small bowel dilation, but be aware it can be misleading post-op
3. Labs: Electrolytes (Na, K, Cl - hypokalemia is a major driver of ileus), serum albumin, CBC, CRP, LFT
4. Water-soluble contrast study (Gastrografin via NGT/ileostomy) - helps differentiate and may even be therapeutic in adhesive SBO

Step 2: Differential Diagnosis to Rule Out

Step 3: Immediate Management

A. Supportive measures (ensure these are optimized)

• NGT (Ryle's tube) on free drainage / suction - confirm it's positioned correctly (tip in stomach, not esophagus) and actually decompressing
• IV fluid resuscitation - Aggressive replacement with Ringer's lactate or normal saline; insert Foley catheter and target urine output >0.5 mL/kg/hr (Sabiston Textbook of Surgery)
• Correct electrolytes: Especially potassium (hypokalemia perpetuates ileus), also correct hyponatremia and hypomagnesemia
• NPO (nothing by mouth)
• Proton pump inhibitor IV
• Stop/minimize opioids if possible (they markedly delay bowel recovery) - use NSAIDs or regional analgesia as alternatives

B. Address the hiccups

• Hiccups from gastric distension usually resolve with adequate NGT decompression
• If persistent: Metoclopramide or Chlorpromazine (10 mg IV/IM) - chlorpromazine is the most effective pharmacologic agent for intractable hiccups
• If no response, check for sub-diaphragmatic pathology on CT

C. Prokinetics (if ileus is confirmed)

• Neostigmine 2 mg IV slowly (over 3-5 min) with cardiac monitoring - useful in colonic pseudo-obstruction (Ogilvie's syndrome), but requires exclusion of mechanical obstruction first
• Metoclopramide IV for upper GI motility
• Erythromycin 250 mg IV TDS (motilin receptor agonist - prokinetic)
• Note: Prokinetics are contraindicated if mechanical obstruction is not excluded - do CT first

D. For the ileostomy specifically

• Digital examination of the ileostomy - gently dilate if stenosis suspected
• If stoma is edematous and not functioning, a soft catheter can be gently inserted into the ileostomy lumen under lubrication
• Water-soluble contrast via ileostomy (retrograde loopogram) - delineates if there is a proximal obstruction

Step 4: Surgical Intervention Criteria

• CT shows complete mechanical obstruction with dilated proximal + collapsed distal bowel (transition point)
• Evidence of internal hernia (highly likely with colorectal surgery - small bowel through mesenteric defect)
• Peritoneal signs: guarding, rigidity, rebound tenderness
• Signs of bowel ischemia/strangulation: fever >38.5, WBC >15,000, tachycardia, metabolic acidosis, pneumatosis on CT
• Free air on imaging

• CT confirms adhesive partial SBO without strangulation signs
• Paralytic ileus pattern (no transition point)
• Some clinical improvement trend

Per Maingot's: "Most surgical texts recommend that the waiting period can be extended to 14 days. If the early bowel obstruction lasts longer than 14 days, less than 10% resolve spontaneously, and exploratory laparotomy is indicated."

Step 5: Special Consideration - Internal Hernia

"A blind gutter may be constructed inadvertently during the creation of a colostomy. When the colostomy is brought up to the anterior abdominal wall, there is a space between the colon and the lateral abdominal wall, which may also trap the mobile loops of small bowel."

• Does NOT resolve with conservative management
• Requires prompt operative intervention due to high risk of strangulation
• Suspected when complete obstipation is present with CT showing herniated loops

Summary Action Plan

1. Urgent CECT abdomen - do this now if not done
2. Confirm NGT position and suction, aggressive IV fluids, correct electrolytes (especially K+)
3. Check ileostomy output and examine stoma
4. If CT shows mechanical obstruction / internal hernia - prepare for emergency exploratory laparotomy
5. If CT shows ileus - optimize electrolytes, minimize opioids, add prokinetics (neostigmine/metoclopramide/erythromycin), reassess q12h
6. For hiccups: chlorpromazine 10 mg IV if not settling with decompression
7. Involve colorectal surgery team for shared decision on operative timing