title: Artificial SMA valve for treatment of urinary incontinence: upgrading of valve and introduction of transcutaneous transformer.
abstract: This paper is concerned with the development of an artificial urethral valve driven by shape memory alloy actuators, which is attached onto the urethra of a urinary incontinence sufferer for treating the involuntary micturition. Three types of compact cylindrical valves are assembled and their opening and closing functions are examined experimentally. The updated valve is heated and opened by using the transcutaneous energy transformer consisting of a pair of flexible spiral-formed copper wire coils. The experiment using the canine urinary canal verifies that the total system of the valve and the transformer works well as an artificial sphictor muscle and controls the urinary flow through the canal appropriately.
authors.affiliation: Department of Mechatronics and Precision Engineering, Graduate School of Engineering, Tohoku University, Sendai, Japan. mami@rose.mech.tohoku.ac.jp
authors.forename: M
authors.initials: M
authors.lastname: Tanaka
authors.forename: K
authors.initials: K
authors.lastname: Hirano
authors.forename: H
authors.initials: H
authors.lastname: Goto
authors.forename: T
authors.initials: T
authors.lastname: Namima
authors.forename: K
authors.initials: K
authors.lastname: Uchi
authors.forename: Z W
authors.initials: ZW
authors.lastname: Jiang
authors.forename: H
authors.initials: H
authors.lastname: Matsuki
authors.forename: Y
authors.initials: Y
authors.lastname: Tanahashi
authors.forename: S
authors.initials: S
authors.lastname: Orikasa
authors.forename: S
authors.initials: S
authors.lastname: Chonan
mesh_terms: D000818:Animals; D003300:Copper; D004285:Dogs; D006358:Hot Temperature; D008297:Male; D011312:Pressure; D011474:Prosthesis Design; D012212:Rheology; D014521:Urethra / Q000601:surgery*; D014549:Urinary Incontinence / Q000601:surgery*; D016741:Urinary Sphincter, Artificial
chemical_list: D003300:Copper