2001 Fiscal Year Final Research Report Summary
Development of artificial valve for opening/closing hollow organs using by SMA actuators
| Project/Area Number |
11555063
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
Dynamics/Control
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| Research Institution | Tohoku University |
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Principal Investigator |
CHONAN Seiji Tohoku University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (20005424)
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| Co-Investigator(Kenkyū-buntansha) |
FURUYA Yasufumi Department of Intelligent Machines and System Engineering, Hirosaki University, Professor, 理工学部・知能機械工学科, 教授 (20133051)
TANI Junji Tohoku University, Institute of fluid science, Professor, 流体科学研究所, 教授 (30006192)
JIANG Zhongwei Department of Mechanical Engineering, Yamaguchi University, Professor, 工学部・機械工学科, 教授 (60225357)
NAMIMA Takashige Tohoku University, Graduate School of Medicine, Research Associate, 大学院・医学系研究科, 助手 (70282069)
TANAKA Mami Tohoku University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (80271873)
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| Project Period (FY) |
1999 – 2001
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| Keywords | Shape Memory Alloy (SMA) / Artificial urethral valve / Transcutaneous energy transmission system / Animal experiment |
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| Research Abstract |
In this project, artificial urethral valves have been especially focused on in hollow organs. The artificial urethral valve using SMA actuators with transcutaneous energy transmission system have been focused on and developed. The obtained results are summarized as follows.
(1) Aiming at further improvement in the biocompatibility and preventing the problem of accident pinch of urethra by the valve, a new improved valve was developed. Opening and closing functions of the new valve were verified by laboratory and animal experiments.
(2) A transcutaneous energy transformer powered by batteries was developed. Stable driving of the valve can be obtained by introducing a voltage regulating circuit to compensate the electric consumption of the batteries. The energy transmission efficiency improvement by using of sinusoidal oscillation instead of rectangle oscillation was confirmed.
(3) In vitro and in vivo animal experiments showed that the improved valve and the transcutaneous energy transmission system powered by batteries works well as a substitute for urethral sphincter in controlling the discharge of urine.
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