Evaluation of Optimal Stent Size After Endourologic Incision of Ureteral Strictures

Y. T. Moon, K. Kerbl, Margaret S Pearle, S. M. Gardner, E. M. McDougall, P. Humphrey, R. V. Clayman

Research output: Contribution to journalArticlepeer-review

54 Scopus citations


The stent size necessary to promote optimal ureteral healing after an endoureterotomy is not known. We compared healing of an endoureterotomy over a 7F indwelling ureteral stent with healing over a 14F endopyelotomy stent. A midureteral stricture was created in each of 25 anesthetized female minipigs using an electrified stone basket passed retrograde. Six weeks later, the stricture was incised with a 24F cutting balloon device. Twenty pigs were randomized to receive a 7F or a 14F stent; four control pigs received neither incisions nor stents. At 1 week, a radiograph was performed to confirm proper stent position, and the stents were removed. At 3 months, a retrograde ureterogram was performed, and the ureters were examined grossly and harvested for histologic studies. Two of the ten pigs in each study group developed a recurrent stricture. The use of a 14F stent provided no advantage over the use of a smaller, more easily positioned 7F stent.

Original languageEnglish (US)
Pages (from-to)15-22
Number of pages8
JournalJournal of Endourology
Issue number1
StatePublished - Feb 1995

ASJC Scopus subject areas

  • Urology


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