Development of an artificial urethral valve using SMA actuators

S. Chonan, Z. W. Jiang, J. Tani, S. Orikasa, Y. Tanahashi, T. Takagi, M. Tanaka, J. Tanikawa

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)


The development of an artificial urethral valve for the treatment of urinary incontinence which occurs frequently in the aged is described. The prototype urethral valve is assembled in hand-drum form with four thin shape memory alloy (SMA) (nickel-titanium alloy) plates of 0.3 mm thickness. The shape memory effect in two directions is used to replace the urinary canal sphincter muscles and to control the canal opening and closing functions. The characteristic of the SMA is to assume the shape of a circular arc at normal temperatures and a flat shape at higher temperatures. Experiments have been conducted using a canine bladder and urinary canal.

Original languageEnglish
Article number004
Pages (from-to)410-414
Number of pages5
JournalSmart Materials and Structures
Issue number4
Publication statusPublished - 1997 Aug

ASJC Scopus subject areas

  • Signal Processing
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering


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