title: The Optical Dilator: a clear, over-the-scope bougie with sequential dilating segments.
abstract: OBJECTIVE
  The safety and efficacy of esophageal dilation is enhanced when direct visualization is possible, tactile sensation and feedback from resistance is maintained, and multiple dilations with a single passage of the dilating device is an option. The InScope Optical Dilator (InScope, a Division of Ethicon Endo-Surgery, Inc, Cincinnati, Ohio) is a flexible, transparent bougie fitted over a standard endoscope, with 3 dilating segments allowing sequential dilation under direct visualization. We report our experience with this device in treating benign esophageal strictures.
  
  
  METHODS
  Patients with solid food dysphagia due to peptic strictures or Schatzki's ring were studied by using a 27F or 29F endoscope. Based on stricture appearance and estimated luminal diameter, 1 of 3 dilator sizes was chosen: IN0216 (14-, 15-, and 16-mm dilating segments), IN0218 (16-, 17-, and 18-mm dilating segments), or IN0220 (18-, 19-, and 20-mm dilating segments).
  
  
  RESULTS
  Twenty-six patients were dilated and included 17 peptic strictures and 9 Schatzki's rings. Before dilation, most patients reported difficulties with solids at every meal. Median improvement 3 weeks after dilation was rated by patients as "substantial relief." Patients rated the dilation experience as largely "not at all unpleasant" immediately after endoscopy and had no recollection at 3 weeks' follow-up. There were no complications. Endoscopists rated dilator use as typical of experience with other bougies, and visualization was rated as high.
  
  
  CONCLUSIONS
  The Optical Dilator maintains the value of tactile sensation and the convenience of 3 dilating sizes for each passage of the instrument with the added benefit of direct visualization.
authors.affiliation: Division of Gastroenterology, Feinberg School of Medicine, Northwestern University Chicago, Illinois 60611-2908, USA.
authors.forename: Michael P
authors.initials: MP
authors.lastname: Jones
authors.forename: Jason R
authors.initials: JR
authors.lastname: Bratten
authors.forename: Stephen A
authors.initials: SA
authors.lastname: McClave
mesh_terms: D000293:Adolescent; D000328:Adult; D003680:Deglutition Disorders / Q000628:therapy*; D004106:Dilatation / Q000295:instrumentation*; D016099:Endoscopy, Gastrointestinal / Q000379:methods; D004867:Equipment Design; D004940:Esophageal Stenosis / Q000628:therapy*; D005260:Female; D020699:Gastroscopes; D006801:Humans; D008297:Male; D008875:Middle Aged