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)

概要

論文の詳細を見る
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.
一般社団法人日本機械学会の論文
2005-09-18