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A Modified Method of Arterial Elasticity Index Including Effects of Constraints From Surrounding Tissues

[+] Author Affiliations
Shinichiro Ota, Setsuo Takatani

Tokyo Medical and Dental University, Tokyo, Japan

Toshitaka Yasuda

Tokyo National College of Technology, Hachioji, Tokyo, Japan

Takashi Saito

Yamaguchi University, Ube, Yamaguchi, Japan

Paper No. IMECE2009-11784, pp. 87-88; 2 pages
doi:10.1115/IMECE2009-11784
From:
  • ASME 2009 International Mechanical Engineering Congress and Exposition
  • Volume 2: Biomedical and Biotechnology Engineering
  • Lake Buena Vista, Florida, USA, November 13–19, 2009
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4375-8 | eISBN: 978-0-7918-3863-1
  • Copyright © 2009 by ASME

abstract

Previously, we proposed an estimation method of arterial elasticity index (EM ) independent of geometric factors such as the radius and wall thickness. Since the previous method was based on an equation of a motion that assumed a thin cylindrical model with infinite length, it is thus necessary to account for the effects of dynamic constraints from surrounding tissues. The purpose of this study is to propose a modified method for quantifying arterial elasticity index accounting for the effects of dynamic constraints. We describe the modified method by vibration analysis of a thin cylindrical shell using a natural frequency depending on boundary conditions. To examine the feasibility of the proposed method, we measured the inner pressure, radius and natural frequency of the mock-vessels with dynamic constraints. From these results, the elasticity index (EM ) was derived independent of the effects of dynamic constraints. In summary, the proposed method enabled to derive elastic properties of arteries accounting for the effects of dynamic constraints in mock-vessels with both ends restricted.

Copyright © 2009 by ASME

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