title: Orthotopic ileal neobladder: the influence of reservoir volume and configuration on urinary continence and emptying properties.
abstract: OBJECTIVE
  To evaluate the influence of the volume and configuration of the neobladder on urinary continence and reservoir emptying in orthotopic urinary reservoirs using intestinal segments for bladder replacement after radical cystectomy.
  
  
  METHODS
  Fifty-nine patients who had had a radical cystectomy and urinary reconstruction with an orthotopic ileal neobladder were followed for > or = 1 year; 27 (group 1) had the ileal neobladder created with a shorter intestinal segment (40 cm) in an elongated shape ('J'), and 32 (group 2) had their reservoir made more spherical with a longer ileal loop (60-65 cm). The rates of urinary continence, enuresis, neobladder capacity and postvoid residual urine were evaluated first at 3-6 months and again 1 year after surgery in both groups.
  
  
  RESULTS
  At 3-6 months after surgery urinary incontinence and enuresis were more common in group 1, but at 1 year had the same frequency in both groups, at respectively 11% and 44% in group 1, and 13% and 47% in group 2 (P > 0.05). The neobladder capacity and postvoid residual urine were significantly higher in group 2, at > 600 mL and > 100 mL, respectively, in 14% and 14% of the patients in group 1 and 57% and 52% of those in group 2 (P < 0.05). Urinary retention requiring intermittent catheterization did not occur in group 1 but did in 19% of group 2.
  
  
  CONCLUSIONS
  The orthotopic spherical ileal neobladder with a large initial volume is apparently not associated with better continence rates and is prone to developing progressive enlargement, which can lead to neobladder atony and progressive emptying failure, increasing the chance of complete urinary retention.
authors.affiliation: Division of Urology, Federal University of São Paulo, São Paulo, Brazil. nesrallahuro@uol.com.br
authors.forename: L J
authors.initials: LJ
authors.lastname: Nesrallah
authors.forename: M
authors.initials: M
authors.lastname: Srougi
authors.forename: M F
authors.initials: MF
authors.lastname: Dall'Oglio
mesh_terms: D000328:Adult; D000368:Aged; D002295:Carcinoma, Transitional Cell / Q000601:surgery*; D015653:Cystectomy / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000209:etiology* / Q000473:pathology; D011468:Prostatectomy / Q000379:methods; D001749:Urinary Bladder Neoplasms / Q000601:surgery*; D014549:Urinary Incontinence / Q000209:etiology* / Q000473:pathology; D016476:Urinary Reservoirs, Continent / Q000473:pathology*