Urodynamic analysis of voiding dysfunction in orthotopic ileal neobladder

D. Porru, G. Madeddu, G. Campus, I. Montisci, G. Caddemi, R. M. Scarpa, E. Usai

Research output: Contribution to journalArticlepeer-review


We examined the urodynamics, particularly voiding dysfunction, in patients with a neobladder. Free uroflowmetry, pressure-flow study, and voiding cystourethrography were performed in 22 patients (mean age 65 years) at a mean of 21 months after ileal neobladder substitution. The results of free uroflowmetry were used to divide patients into two groups: the good voiders and the poor. Daytime continence was achieved in all patients, while 10 (45%) had nighttime continence. To void 250 ml urine the good voiders strained 2 ±1.5 times, and the poor voiders 6 ±5 times. The neobladder neck was at the most caudal portion of the reservoir in good voiders, and there was wide funneling. In the group with poor emptying ability, the outlet was not located at the most dependent position. The principal factors for ensuring good voiding function in neobladder patients are the ability to perform effective straining and the location of the neobladder neck. assessments have usually confirmed the low-pressure characteristics of the ileal reservoir [14J. Most reports on urodynamic features of continent urinary reservoirs focus on storage characteristics [1, 2, 5, 11], while the causes of voiding dysfunction remain only partially understood. Specifically the outlet mechanism is considered important here. Some patients with a neobladder do not empty the reservoir completely and smoothly; in some cases the extent of residual urine volume makes necessary intermittent catheterization. We examined on the voiding mechanism in patients with a neobladder in order to help elucidate voiding dysfunction.

Original languageEnglish
Pages (from-to)285-289
Number of pages5
JournalWorld Journal of Urology
Issue number5
Publication statusPublished - 1999


  • Orthotopic ileal reservoir
  • Studer neobladder
  • Urodynamic investigation

ASJC Scopus subject areas

  • Urology


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