title: The unintubated ureterotomy endourologically revisited.
abstract: OBJECTIVE
  The duration of stenting after endoureterotomy is a controversial issue. An even more basic question, however, is whether stent placement is needed at all. We performed a porcine study to address this question.
  
  
  METHODS
  A unilateral midureteral stricture was created in 20 minipigs. Six weeks later, 15 pigs underwent endoureterotomy. In 10 animals, a 7F ureteral stent was placed for 1 week. Five pigs remained unstented. Three months later, all 20 ureters were studied radiographically and were harvested.
  
  
  RESULTS
  Three of 5 control animals and 2 of 10 stented animals has strictures. In the unstented study group, all 5 animals had a nonobstructing dilation at the site of endoureterotomy. This was corroborated by a normal furosemide washout renal scan in all 3 animals so tested.
  
  
  CONCLUSIONS
  The result of unstented endoureterotomy in the porcine model suggests that, after endoureterotomy of secondary midureteral strictures, stenting may be unnecessary.
authors.affiliation: Department of Surgery, Washington University, St. Louis, Missouri 63110, USA.
authors.forename: S M
authors.initials: SM
authors.lastname: Gardner
authors.forename: J S
authors.initials: JS
authors.lastname: Wolf
authors.forename: S Y
authors.initials: SY
authors.lastname: Nakada
authors.forename: Y T
authors.initials: YT
authors.lastname: Moon
authors.forename: R S
authors.initials: RS
authors.lastname: Figenshau
authors.forename: M S
authors.initials: MS
authors.lastname: Pearle
authors.forename: J J
authors.initials: JJ
authors.lastname: Soble
authors.forename: P A
authors.initials: PA
authors.lastname: Humphrey
authors.forename: R V
authors.initials: RV
authors.lastname: Clayman
mesh_terms: D000818:Animals; D005260:Female; D015607:Stents; D013552:Swine; D013556:Swine, Miniature; D014513:Ureter / Q000473:pathology / Q000601:surgery*; D014517:Ureteral Obstruction / Q000601:surgery*