1133 Biphasic理論に基づく脊髄組織の粘弾性有限要素解析(S11-2 計測と力学-生体への応用(2),S11 計測と力学-生体への応用)  [in Japanese] 1133 Visco Elastic Finite Element Analysis of Spinal Cord by Biphasic Theory  [in Japanese]

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Abstract

It is very important to understand the mechanical function of spinal cord for therapeutic improvement or pathologic elucidation. Spinal cord is a biphasic substance composed of solid and liquid phases. When it deforms, liquid phase in the tissue flows out through between solid phases. The interaction between two phases derives the macroscopic viscoelastic behavior. An experimental equipment was developed to measure biphasic behavior using a porous metal in the bottom of specimen to flow liquid phase. Stress-relaxation test was done in the confined compression. As a result, gray matter is more rigid than white matter. In relaxation stage, an equilibrium stress in air was higher than in saline. The permeability equation of tissue was determined by applying the biphasic continuum theory. 3D FE analysis of cervical spinal cord was performed for cervical spine fracture. It was confirmed that the stress distribution of internal points in spinal cord was changed rapidly and decreased gradually according to relaxation time.

Journal

  • The proceedings of the JSME annual meeting

    The proceedings of the JSME annual meeting 2005.5(0), 109-110, 2005

    The Japan Society of Mechanical Engineers

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