Upper Endoscopy with Dilation for Symptomatic Esophageal Narrowing
Perform endoscopic dilation when patients have symptomatic dysphagia from esophageal strictures, using wire-guided bougie or balloon dilators in a fully equipped endoscopy suite, with the specific technique and target diameter tailored to the underlying cause of the stricture. 1
Pre-Procedure Considerations
Facility Requirements
- Perform in a dedicated endoscopy room with fluoroscopy access and surgical backup available 1
- Ensure an agreed protocol exists for managing perforation, with identified surgeon on or off-site 1
Dilator Selection
Both balloon and wire-guided bougie dilators are equally effective 1. The choice depends on:
- Bougienage: More cost-effective (consumable costs significantly lower than disposable balloons) 1
- Balloon: Allows direct visualization during dilation 1
- Use wire-guided or endoscopically controlled techniques for all patients to enhance safety 1
- Never use weighted (Maloney) bougies with blind insertion 1
Fluoroscopy Guidance
- Not required for simple, straightforward strictures 1
- Mandatory for high-risk strictures: post-radiation, caustic injury, long, angulated, multiple, or those not passable endoscopically 1
Stricture-Specific Protocols
Peptic Strictures
Target diameter: 13-15 mm (may require up to 16-20 mm if symptoms persist)
- Always prescribe PPI therapy before and after dilation—this is high-grade evidence that reduces need for repeat dilation and stricture recurrence 1
- H2 receptor antagonists are ineffective and should not be used 1
- Perform weekly or two-weekly sessions until ≥15 mm diameter achieved with symptom improvement 1
Schatzki's Ring
Target diameter: 16-20 mm in a single session
- Do not dilate asymptomatic rings discovered incidentally 1
- Exclude eosinophilic esophagitis with biopsies from distal, mid, and proximal esophagus before proceeding 1
- Single aggressive dilation session to 16-20 mm provides best outcomes 1
- Prescribe PPI therapy after dilation to reduce relapse risk 1
- Consider electrosurgical (needle knife) incision as alternative if dilation ineffective 1
Eosinophilic Esophagitis
Start medical therapy before dilation when possible
- Offer dilation alongside disease-modifying treatment (PPI, topical steroids, elimination diet) 1
- Warn patients that chest pain is common after dilation in EoE 1
- Continue medical therapy after dilation to prevent recurrence 1
- Consider dilation for narrow-caliber esophagus or when medical treatment fails 1
Post-Radiation or Post-Operative Strictures
Higher perforation risk—proceed cautiously
- Perforation rates up to 1.1% for post-endotherapy strictures 1
- Avoid dilation within 3 weeks of caustic ingestion 1
- For post-fundoplication dysphagia: assess wrap integrity first, then use 30-40 mm pneumatic balloon (as for achalasia) 1
- For anastomotic strictures: consider intralesional steroid injection (triamcinolone 40 mg/mL in four quadrants) to reduce re-dilation frequency 1
- For completely obstructed esophagus: consider combined anterograde-retrograde dilation (CARD) with fluoroscopy at expert centers 1
Achalasia
Use pneumatic balloons 30-40 mm
- Start with 30 mm balloon in first session 1
- Perform second session 2-28 days later with 35 mm balloon 1
- Prescribe PPI therapy after dilation (10-40% develop symptomatic GERD) 1
- Consider water-soluble contrast swallow to screen for perforation, though not essential 1
Dilation Technique
Initial Approach for Very Tight Strictures
- Limit initial dilation to 10-12 mm (30-36F) for strictures not passable by adult gastroscope 1
- For filiform strictures, target ≤9 mm initially 1
The "Rule of Three"
- Consider using no more than three successively larger diameter increments per session 1
- This traditional rule is not strictly evidence-based but provides safety margin for complex strictures 1
Carbon Dioxide Insufflation
Use CO₂ instead of air during endoscopy for complex strictures to minimize luminal distension and post-procedural pain 1
Post-Procedure Management
Immediate Recovery (2 hours minimum)
- Monitor in recovery room for at least 2 hours 1
- Ensure patient tolerates water before discharge 1
- Provide written instructions on fluids, diet, and medications 1
- Give contact information for on-call team 1
Imaging After Dilation
Do not perform routine contrast studies unless patient develops:
- Persistent chest pain (transient pain is common)
- Fever
- Breathlessness
- Tachycardia 1
Suspecting Perforation
If persistent symptoms develop, obtain CT scan with oral contrast 1. If perforation confirmed while still in procedure room, perform immediate endoscopic re-inspection and consider covered stent placement 1
Refractory Strictures
When strictures recur despite standard dilation:
- Ensure optimal acid suppression with high-dose PPI therapy 1
- Consider alternative diagnoses: neuromuscular causes if diameter seems adequate 1
- Intralesional steroid injection (triamcinolone) combined with dilation for inflammatory strictures 1
- Needle knife incision for refractory Schatzki's rings and anastomotic strictures at experienced centers 1
- Temporary fully covered self-expanding metal stent (4-8 weeks) 1
- Self-dilation for selected patients with proximal strictures 1
- Referral to expert centers for complex cases 1
Common Pitfalls
- Assuming dysphagia is functional in psychiatric patients without endoscopic evaluation—always investigate obstructive features 2
- Using H2 blockers instead of PPIs for peptic strictures—they are ineffective 1
- Dilating asymptomatic Schatzki's rings—no benefit, only risk 1
- Failing to biopsy for eosinophilic esophagitis in Schatzki's ring patients 1
- Aggressive dilation of malignant strictures—modest dilation only, as perforation risk is higher and stenting is usually definitive 3