Gallstone Ileus Management
For gallstone ileus, perform immediate enterolithotomy to relieve the bowel obstruction, and defer cholecystectomy with fistula repair to a later date (two-stage approach) in elderly or high-risk patients to minimize perioperative mortality.
Immediate Surgical Intervention
Gallstone ileus is a surgical emergency requiring prompt operative management to relieve mechanical bowel obstruction. The impacted stone—typically 2.5-4 cm in size lodged in the terminal ileum—must be removed urgently 1, 2, 3, 4, 5.
Primary Procedure: Enterolithotomy
- Enterolithotomy alone is the preferred initial approach for most patients, particularly those over 70 years with significant comorbidities 2, 4, 5
- The procedure can be performed either:
Critical intraoperative decision: Choose the enterotomy site based on bowel viability—perform distal enterotomy if the distal bowel is decompressed and healthier, as this reduces anastomotic complications 4.
Staged vs. One-Stage Approach
Two-Stage Strategy (Recommended for High-Risk Patients)
The evidence strongly supports enterolithotomy alone initially, with delayed cholecystectomy and fistula repair scheduled 6-8 weeks later 1, 2, 4. This approach is preferred because:
- Lower perioperative mortality in elderly patients (median age 74-83 years) 2, 5
- Reduces operative time and anesthetic exposure in frail patients
- Addresses the life-threatening obstruction immediately
- Allows optimization before definitive biliary surgery
One-Stage Surgery (Selected Cases Only)
Simultaneous enterolithotomy + cholecystectomy + fistula repair should be reserved for:
- Younger patients (<60 years) with minimal comorbidities
- Patients with good physiologic reserve
- Absence of significant inflammation at the fistula site
Important caveat: The recurrence risk after enterolithotomy alone is low enough that many elderly patients may never require the second stage, especially if they remain asymptomatic 2, 4.
Diagnostic Confirmation
Before surgery, CT abdomen is the gold standard and should demonstrate Rigler's triad 3:
- Pneumobilia (air in biliary tree)
- Ectopic gallstone in bowel lumen
- Small bowel obstruction
Look for the cholecystoduodenal fistula (most common) on imaging 1, 3.
Patient Population Characteristics
Gallstone ileus predominantly affects:
- Elderly females (90% of cases) over age 70 5
- Patients with long-standing gallstone disease (often 20+ years) 3
- Those with chronic cholecystitis leading to fistula formation
Clinical presentation: Abdominal pain, vomiting, distension, and constipation for 2-7 days before presentation 5. Expect deranged liver function tests in 50% and elevated inflammatory markers (WBC, CRP) in 60% 5.
Postoperative Management
- Monitor for anastomotic complications
- Address any acute kidney injury (present in 50% at presentation) 5
- Schedule interval cholecystectomy only if patient develops recurrent biliary symptoms
- Many elderly patients with significant comorbidities may not require the second stage if asymptomatic 2
Critical pitfall to avoid: Do not attempt simultaneous cholecystectomy and fistula repair in elderly patients with multiple comorbidities, as this significantly increases operative mortality without proportional benefit 2, 4.