title: [Effects of ureteral stents on rabbit upper urinary tract urodynamics].
abstract: 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.
authors.affiliation: Center of Minimal Invasive Surgery, First Affiliated Hospital, Guangzhou Medical College, Guangzhou 510230, China. qdf70818@tom.com
authors.forename: De-feng
authors.initials: DF
authors.lastname: Qi
authors.forename: Kai-jun
authors.initials: KJ
authors.lastname: Wu
authors.forename: Xun
authors.initials: X
authors.lastname: Li
authors.forename: Zhi-chang
authors.initials: ZC
authors.lastname: Shan
authors.forename: Min-yi
authors.initials: MY
authors.lastname: Xia
authors.forename: Bin
authors.initials: B
authors.lastname: Guo
authors.forename: Wen-zhong
authors.initials: WZ
authors.lastname: Chen
authors.forename: Guo-hua
authors.initials: GH
authors.lastname: Zeng
mesh_terms: 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