Use of a bougie-shaped cap for dilation with direct visual control for an esophageal stricture induced by radiation therapy.

Bougies and balloons are two instruments commonly used for endoscopic dilation of benign strictures in the upper gastrointestinal tract, with similar efficacy [1]. Endoscopic dilation with bougies versus balloon dilation in esophageal benign strictures: systematic review and meta-analysis. [Extracted from the article]