The unintubated ureterotomy endourologically revisited.
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.
Gardner
S M
SM
Department of Surgery, Washington University, St. Louis, Missouri 63110, USA.
Wolf
J S
JS
Nakada
S Y
SY
Moon
Y T
YT
Figenshau
R S
RS
Pearle
M S
MS
Soble
J J
JJ
Humphrey
P A
PA
Clayman
R V
RV
D000818:Animals; D005260:Female; D015607:Stents; D013552:Swine; D013556:Swine, Miniature; D014513:Ureter / Q000473:pathology / Q000601:surgery*; D014517:Ureteral Obstruction / Q000601:surgery*