[Effects of ureteral stents on rabbit upper urinary tract urodynamics].
OBJECTIVE
To explore the effects of ureteral stent placement on ureteral peristalsis and the time course of renal pelvic pressure changes.


METHODS
Forty rabbits were randomized equally into 8 groups, including a control group without placement of ureteral stents. The other 7 groups received ureteral stent placement, which were retained for 0, 1, 2, 3, 4, 7, and 12 weeks respectively. When the rabbits were bred for the specified time periods, ureteral peristalsis was observed and renal pelvic pressure measured.


RESULTS
The renal pelvic pressure was initially increased after the stent placement, but then followed by gradual decreases. Ureteral peristalsis was not observed after the stent placement.


CONCLUSIONS
Ureteral stent is a factor for causing obstruction in normal ureter.
Qi
De-feng
DF
Center of Minimal Invasive Surgery, First Affiliated Hospital, Guangzhou Medical College, Guangzhou 510230, China. qdf70818@tom.com
Wu
Kai-jun
KJ
Li
Xun
X
Shan
Zhi-chang
ZC
Xia
Min-yi
MY
Guo
Bin
B
Chen
Wen-zhong
WZ
Zeng
Guo-hua
GH
D000818:Animals; D007682:Kidney Pelvis / Q000502:physiology; D008297:Male; D010528:Peristalsis; D011817:Rabbits; D011897:Random Allocation; D015607:Stents / Q000009:adverse effects; D014513:Ureter / Q000503:physiopathology* / Q000601:surgery; D014546:Urinary Catheterization; D014563:Urodynamics