title: [Enhanced continent mechanism of the tapered ileum in continent urinary reservoir].
abstract: OBJECTIVE
  To construct a reliable continent tube that is easy to catheterize and is surgically simple.
  
  
  METHODS
  From October 1999 through March 2001, 20 patients underwent a procedure in which ileal segment was tapered as an efferent tube and the partial efferent tube was placed between the back surface of the rectus muscle and the wall of the ileal pouch. The internal orifice of the tapered ileum was anastomosed to the ileal pouch and its external orifice of the tapered ileum was anastomosed to the umbilicus. Urodynamic study of the efferent tubes and pouch was done 1.5 to 3 months and 6 to 17 months after operation.
  
  
  RESULTS
  The stoma was easily catheterized with a 16 F catheter in all patients. One patient died of heart disease 55 days after the operation, while 18 of the remaining 19 were completely continent day and night. At 1.5 to 3 months, the urodynamic study of the efferent tubes showed the maximum close pressure with a full pouch of 46-124 cmH2O(91.53 +/- 17.21), and when the pouch was empty it was 34-84 cmH2O(66.68 +/- 11.60). The difference in the mean maximum closure pressure in full and empty pouches was statistically significant (t = 10.59, P < 0.01). At 6 to 17 months, urodynamic study was performed in 12 patients, the maximum closure pressure in the efferent tube was 77 to 154 cmH2O (100.92 +/- 20.88) when the pouch was filled with saline. When the pouch was empty, it was 56 to 115 cmH2O (74.08 +/- 14.59). The difference in the mean maximum closure pressure in full and empty pouches was statistically significant (t = 8.54, P < 0.01). Reservoir capacity was 360 to 750 ml (455 +/- 110.74). When it was filled to the maximum, the reservoir pressure was 16 to 35 cmH2O (23.17 +/- 5.82). There was no contractive wave in filling in any patient.
  
  
  CONCLUSIONS
  This study indicates that the continent mechanism of the tapered ileum can be greatly enhanced by fixing it between the abdominal and pouch walls. This maneuver also provides easy catheterization and surgical simplicity.
authors.affiliation: Department of Urology, Shanghai Sixth Municipal Hospital, Shanghai 200233, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Xu
authors.forename: Y
authors.initials: Y
authors.lastname: Qiao
authors.forename: Y
authors.initials: Y
authors.lastname: Sa
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007082:Ileum / Q000601:surgery / Q000637:transplantation*; D008297:Male; D008875:Middle Aged; D016896:Treatment Outcome; D001749:Urinary Bladder Neoplasms / Q000601:surgery*; D016476:Urinary Reservoirs, Continent; D014563:Urodynamics / Q000502:physiology