| Project/Area Number |
12555063
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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 | THE UNIVERSITY OF TOKYO |
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Principal Investigator |
KANEKO Shigehiko GRADUATE SCHOOL OF ENGINEERING, PROFESSOR, 大学院・工学系研究科, 助教授 (70143378)
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| Co-Investigator(Kenkyū-buntansha) |
YAMANE Takashi NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, VICE-RESEARCH DIRECTOR, 人間福祉工学研究部門, 副部門長(研究職)
WATANABE Tatsuo GRADUATE SCHOOL OF ENGINEERING, Research Associate, 大学院・工学系研究科, 助手 (70011179)
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| Project Period (FY) |
2000 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥12,500,000 (Direct Cost: ¥12,500,000)
Fiscal Year 2002: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 2001: ¥5,300,000 (Direct Cost: ¥5,300,000)
Fiscal Year 2000: ¥4,500,000 (Direct Cost: ¥4,500,000)
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| Keywords | FLOW-INDUCED VIBRATION / COLLAPSIBLE TUBE / BLOOD PRESSURE METER / BIOINSTRUMENTATION / BLOOD PRESSURE MEASUREMENT / DATA ACQUISITION / SIMULATION / WAVELET TRANSFORMATION |
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| Research Abstract |
This study is concerned with the mechanism of blood pressure measurement and the argument on the accuracy of the measured results. First, we designed and machined an equipment to simulate precisely the behavior of the pressure pulsation and the vibration characteristics of blood vessel of an upper arm of a human body during blood pressure measurement. Experimental parameters we mainly focused on are average pressure level, amplitude of pressure pulsations and the range of observed blood vessel vibrations i.e. the initiation and vanishing point of vibration and corresponding average blood pressure level.
We also developed computer code to simulate the behavior of the blood vessel precisely based on the physical model of the collapsible tube taking account of the effect of rigidity of the tube. Comparisons between calculated and experimental results are made and the reasonable agreement is obtained. In addition, we conducted a basic research to develop the method of calculation concerned with fluid structure interaction between thin flexible structure and the flowing fluid where non-linearity of the fluid force is first treated and the limit cycle oscillation is first derived by calculation. This method is anticipated to become a tool to analyze the dynamic characteristics of blood vessels and vane in near future.
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