Endoscopic Reduction of Gastric Volvulus
Endoscopic reduction of gastric volvulus is performed by advancing a flexible endoscope through the twisted stomach into the duodenum, then pulling back with rotational torque (typically clockwise for mesenteroaxial volvulus) while maintaining low intragastric pressure to untwist the stomach.
Technical Approach
Pre-Procedure Preparation
- Perform under general anesthesia or deep sedation to ensure patient cooperation and airway protection
- Insert nasogastric tube first to decompress the stomach and facilitate endoscopic visualization 1, 2
- Aspirate intragastric gas to maintain low intragastric pressure throughout the procedure 3
Step-by-Step Technique
Initial Endoscopic Navigation:
- Advance the flexible endoscope carefully through the twisted gastric lumen
- Navigate past the point(s) of torsion—typically 2 transition points are encountered 4
- Continue advancement until reaching the descending portion of the duodenum 3, 5
Reduction Maneuver:
- Once in the duodenum, fix the endoscope position (balloon-assisted endoscopes can be inflated at the tip to anchor in the duodenum) 3, 5
- Pull back the endoscope while applying clockwise rotational torque for mesenteroaxial volvulus 3, 5
- The combination of traction and rotation untwists the stomach along its mesenteric axis
Post-Reduction Assessment:
- Mandatory endoscopic visualization of gastric mucosa to assess viability—look for ischemia, necrosis, or perforation 4
- If severe mucosal ischemia, perforation, or impending perforation is discovered, abort the procedure immediately and proceed to emergency surgery 4
Advanced Techniques for Difficult Cases
Balloon-Assisted Endoscopy:
- Use balloon-attached endoscopes when conventional endoscopy fails 5
- The balloon provides better fixation in the duodenum without mucosal damage
- Particularly useful in elderly patients or those with anatomic challenges
Gel Immersion Endoscopy:
- Inject clear gel through the accessory channel to secure visual field 3
- Maintains visualization even with gastric residue while keeping intragastric pressure low
- Especially effective in pediatric cases or when conventional visualization is inadequate
Fluoroscopic Guidance:
- Use X-ray fluoroscopy during the procedure to monitor stomach position in real-time 5
- Helps confirm successful reduction and proper endoscope positioning
Post-Reduction Management
Immediate:
- Place a decompression/flatus tube through the endoscope to maintain reduction 4
- Leave tube in place for continued colonic decompression and to facilitate bowel preparation 4
Definitive Treatment:
- Critical caveat: Endoscopic reduction alone has 43-75% recurrence rates 4
- Strongly recommend surgical intervention (gastropexy or definitive repair) during index admission or within 2-3 weeks 6
- For high-risk surgical patients who cannot tolerate surgery, consider percutaneous endoscopic gastrostomy (PEG) placement for gastric wall fixation as a minimally invasive alternative to prevent recurrence 1, 7
Key Technical Pitfalls to Avoid
Excessive insufflation: Maintain LOW intragastric pressure—over-insufflation can worsen the volvulus or cause perforation 3
Forcing the endoscope: If you cannot visualize or pass the transition points safely, do not force advancement—this indicates possible ischemia or perforation requiring immediate surgery 4
Skipping mucosal assessment: Always inspect the gastric mucosa after reduction—missing ischemia leads to delayed perforation and mortality 4
Inadequate fixation: Failure to place a decompression tube or arrange definitive treatment leads to early recurrence (can occur within days) 6
Success Rates and Contraindications
- Endoscopic reduction is successful in 60-95% of cases when performed appropriately 4
- Absolute contraindications: Clinical or radiologic evidence of perforation, peritonitis, or established bowel ischemia—these require immediate surgery 4
- Flexible endoscopy is superior to rigid sigmoidoscopy with lower perforation rates and better diagnostic performance 4