Placement of guidewire for esophageal dilation. Improved technique.
D004106:Dilatation / Q000379:methods; D004939:Esophageal Perforation / Q000517:prevention & control; D004940:Esophageal Stenosis / Q000628:therapy*; D020701:Esophagoscopes; D020699:Gastroscopes; D006801:Humans