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1998 Fiscal Year Final Research Report Summary

An urodynamic study on neobladder function

Research Project

Project/Area Number 09671597
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Urology
Research InstitutionHokkaido University

Principal Investigator

AMEDA Kaname  Fac.of Medicine, Hokkaido Univ.Inst., 医学部, 助手 (60271657)

Co-Investigator(Kenkyū-buntansha) KAKIZAKI Hidehiro  Hosp., Hokkaido Univ.Lec., 医学部・附属病院, 講師 (10241324)
Project Period (FY) 1997 – 1998
Keywordsneobladder / Radical Cystectomy / QOL / urodynamics / sphincter dysfunction / upper urinary tract dysfunction
Research Abstract

Eight cases with neobladder after radical cystectomy for bladder cancer were analyzed regarding their urodynamic status. In 1999, we planned to analyze factors which correlated with the occurrence of upper urinary tract damage such as hydronephrasis and vesicoureteral reflux in the follow-up terms. Urodynamics included pressure-flow study and electromyography of the external urethral sphincter, while urography and voiding cystourethrography were also performed as radiological assessments. After a median follow-up of 2 years and 5 months, there are no patients who are unable to void, therefore, we could not identify the factors which relate to the efficacy of micturition. However, one case with large amount of residual urine had both daily and nocturnal incontinence, thus has been suspected of intrapelvic nerve damage which dominates the urinary sphincter other than direct sphincter injury and the fibrosis. As results of pressure-flow analysis, we found it important for voiding efficacy a shape of neobladder, position of urethroileal anastomosis and its flexibility. In 1 case, iatrogenic sphincter dyssynergia was suggested since he showed no urethral relaxation during voiding. There have been no cases with upper urinary tract damage so far. With these findings, however, we empathize the importance of careful long-term follow-up since upper urinary tract deteriration is generally multifactorial and slow to progress.

  • Research Products

    (2 results)

All Other

All Publications (2 results)

  • [Publications] Takahiko Mitsui et al.: "vesicourateral dysfunction following radical surgery for reetal carcinoma : change in raiding pattern on segmental urodynamic studies and impact of nerve-sparing surgery." Int.J.Urol. 5. 35-38 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Takahiko Mitsui et al.: "Vesicourethral dysfunction following radical surgery for rectal carcinoma : change in voiding pattern on sequential urodynamic studies and impact of nerve-sparing surgery." Int.J.Urol.5 (1). 35-38 (1998)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-12-08  

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