Esophageal Dilation

Esophageal dilation is an endoscopic procedure that gently widens a narrowed area of the esophagus. It is one of the most effective treatments for solid-food dysphagia caused by peptic strictures, Schatzki rings, eosinophilic esophagitis (EoE), and achalasia.

When Dilation Is Used

• Peptic stricture — narrowing from chronic GERD-related inflammation
• Schatzki ring — thin mucosal ring at the squamocolumnar junction
• Eosinophilic esophagitis (EoE) stricture — fibrosis and ringed esophagus from chronic inflammation
• Anastomotic stricture — narrowing at a surgical connection
• Radiation-induced stricture
• Caustic stricture
• Achalasia (pneumatic dilation — a different, larger-caliber technique using a balloon at the LES)

How Dilation Is Performed

Dilation is performed during upper endoscopy (EGD), under sedation. Two main techniques are used:

Bougie dilation (Savary)

A series of progressively larger flexible dilators are passed through the stricture over a guide wire. Useful for short, straight strictures.

Through-the-scope (TTS) balloon dilation

A balloon is advanced through the endoscope and inflated across the stricture under direct vision. Allows precise dilation across multiple sizes in one pass and is preferred for many indications including EoE.

The 'rule of three'

To minimize perforation risk, dilation typically advances no more than three serial sizes (or 3 mm) once moderate resistance is encountered in a single session. Most strictures require multiple sessions for full treatment.

What to Expect

• Procedure performed under standard EGD sedation
• Total time: 20–40 minutes including endoscopy
• Most patients return to normal diet within 24 hours
• Mild chest discomfort or sore throat is common; severe pain or difficulty swallowing post-procedure is not normal and warrants evaluation
• You cannot drive for the rest of the day after sedation

Risks and Recovery

Dilation is generally safe in experienced hands. The main risks include:

• Perforation — small risk (~0.1–0.4% for routine dilation; higher for complex cases)
• Bleeding — typically self-limited
• Recurrence — peptic strictures and EoE strictures often require repeat dilation; recurrent peptic strictures are managed with optimized PPI therapy

Severe chest pain, fever, shortness of breath, or persistent vomiting after dilation should be reported immediately.

Outcomes

For most causes — Schatzki rings, mild peptic strictures, EoE-related strictures — dilation is highly effective at restoring normal swallowing. Long-term outcome depends on treating the underlying disease (PPI for peptic stricture, anti-inflammatory therapy for EoE).

Esophageal Dilation: Common Questions