The unintubated ureterotomy endourologically revisited

Stephanie M. Gardner, J. Stuart Wolf, Stephen Y. Nakada, Young Tae Moon, Robert S. Figenshau, Margaret S. Pearle, Jon J. Soble, Peter A. Humphrey, Ralph V. Clayman

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


Purpose: 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 had 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.

Original languageEnglish
Pages (from-to)1160-1163
Number of pages4
JournalJournal of Urology
Issue number3
StatePublished - Sep 1996


  • miniature
  • stents
  • swine
  • ureter


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