title: Effect of stent placement, balloon or cutting balloon dilatation on stricture formation after caustic esophageal burn in rats.
abstract: BACKGROUND
  This study aimed to evaluate the effects of stent placement prior to stricture development following caustic esophageal burn (CEB) in an animal model. The outcomes after stent placement were also compared with those after balloon dilatation and cutting balloon dilatation performed after stricture development. Groups were compared with regard to stricture development and weight loss.
  
  
  METHODS
  40 rats were divided into 5 groups. CEB was created as described by Gehanno et al. In Group A (control) no CEB was performed and the esophagus was only rinsed with saline. Group B rats underwent CEB with no subsequent treatment. Group C rats underwent CEB followed by balloon dilatation in the 3 (rd) and 4 (th) week. Group D rats underwent CEB followed by cutting balloon dilatation in the 3 (rd) week. Group E rats underwent CEB with subsequent placement of a silicon stent in the same session. The animals were sacrificed in the 6 (th) week, and the stenosis index (SI), collagen deposition, and hydroxyproline (HP) levels were determined in the esophageal segments and statistically compared.
  
  
  RESULTS
  Although weight loss occurred in Group C and Group B rats (238.87±15.95 g vs. 233.83±19.01 g), weight loss in Group C rats was less marked compared to Group B. Similarly, the SI in Group C was lower compared to that of Group B and the difference was statistically significant. Although there was no difference in weight between the rats in Group C and Group B before the procedure (p=0.318), there was statistically significant difference thereafter (p=0.002). The SI of Group D was also lower compared with that of Group B, and the difference was statistically significant. Weight gain in Group E rats was similar to that noted in Group A rats and was higher compared to Group B; this difference was statistically significant. The SI for Group E was lower compared to that of Group B.
  
  
  CONCLUSIONS
  Stenting performed at the time of corrosive injury and cutting balloon dilatation performed after stricture formation had a positive effect with regard to SI and weight gain in an animal model.
authors.affiliation: Gazi University Medical Faculty, Pediatric Surgery, Ankara, Turkey.
authors.forename: A
authors.initials: A
authors.lastname: Kapisiz
authors.forename: R
authors.initials: R
authors.lastname: Karabulut
authors.forename: K
authors.initials: K
authors.lastname: Sonmez
authors.forename: Z
authors.initials: Z
authors.lastname: Turkyilmaz
authors.forename: A
authors.initials: A
authors.lastname: Poyraz
authors.forename: O
authors.initials: O
authors.lastname: Gulbahar
authors.forename: B
authors.initials: B
authors.lastname: Onal
authors.forename: A
authors.initials: A
authors.lastname: Ozbayoglu
authors.forename: A C
authors.initials: AC
authors.lastname: Basaklar
mesh_terms: D000818:Animals; D002057:Burns, Chemical / Q000473:pathology / Q000628:therapy*; D002404:Catheterization / Q000379:methods*; D004940:Esophageal Stenosis / Q000139:chemically induced / Q000473:pathology / Q000628:therapy*; D004947:Esophagus / Q000293:injuries* / Q000473:pathology; D051381:Rats; D012972:Sodium Hydroxide; D015607:Stents; D013997:Time Factors; D015430:Weight Gain; D015431:Weight Loss
chemical_list: D012972:Sodium Hydroxide