Evaluation of Optimal Stent Size after Endourologic Incision of Ureteral Strictures.
- Author:
Young Tae MOON
1
;
Ralph V CLAYMAN
Author Information
1. Department of Urology, Chung-Ang University, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
Ureteral stricture;
Endoureterotomy;
Stent size
- MeSH:
Constriction, Pathologic*;
Female;
Humans;
Stents*;
Swine;
Swine, Miniature;
Ureter*
- From:Korean Journal of Urology
1995;36(1):75-82
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
All endoureteromy procedures have in common the use of a ureteral stent as post-procedure However, the optimal stent size necessary to promote satisfactory healing is not known. Herein we compared healing of an endoureterotomy over a 7 Fr indwelling ureteral stent (IUS) with healing over a 14 Fr endopyelotomy stent( ES). A mid-ureteral stricture was created in each of 25 anesthetized, female minipigs using a retrograde electrified stone basket. Six weeks later, retrograde ureterograms(RU) revealed a stricture in 24 pigs ; ureteral incision was performed with a 24 Fr cutting balloon device. Twenty pigs were randomized to receive a 7 Fr IUS or a 14 Fr ES; 4 control pigs were performed to confirm proper stent position and the stents were removed. At 3 months. RU was repeated and the ureters were grossly examined and harvested for histological studies. Two pigs in each group had recurrent strictures. Despite a 50 years history of endoureterotomy, optimal stent size remains an endourologic unknown. Our study represents the first attempt at directly comparing stents of different size in an in vivo ureteral stricture model. There is no significant difference between 7 Fr and 14 Fr stents.
