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KMID : 0358319950360010075
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Korean Journal of Urology
1995 Volume.36 No. 1 p.75 ~ p.82
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Evaluation of Optimal Stent Size after Endourologic Incision of Ureteral Strictures
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문영태/Ralph V. Clayman
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Abstract
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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
indelling
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 histoiogical studies. Two pigs in each group had recurrent strictures.
Despite a 50 years history of endoureterotomy. optimal stent size rematins an endourologic unknown. Our study represents the first attempt at directly comparing stents of different size in an in vivo ureteral stricutre model. There is no
significant
difference between 7 Fr and 14 Fr stents.
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