人体肠道生物力学特性的研究  

Study on the Biomechanical Behavior of Human Intestine

作　　者：周丁华 赵玮 闫涛 朱武晖 朱楚洪[2] 应大君[2] 

机构地区：[1]解放军二炮总医院普通外科,北京100088 [2]第三军医大学人体解剖学教研室,重庆400038

出　　处：《生物医学工程学杂志》2006年第5期1017-1019,共3页Journal of Biomedical Engineering

基　　金：国家自然科学基金资助项目(30270406)

摘　　要：为探讨人体肠道的生物力学特性,采用电子拉伸机对人体肠道进行一维拉伸试验。结果表明,人体肠道应力-应变关系为指数函数关系。人体肠道各段的指数系数a值接近,但材料常数C有一定的差异,说明肠道各段应力-应变趋势是一致的。在一定应力下,肠道各段轴向与环向的相对伸长率是不同的,表明人体肠道具有各向异性的特性。在一定应变下,肠道各段的增量弹性模量不同,结肠增量弹性模量相对较小,因而更容易发生变形。本研究为肠道内窥镜机器人的研制提供了理论基础。To investigate the biomechanical behavior of human intestines. The tensile test human intestine was performed with the electronic tensioneter machine in this paper. The results indicate that the exponential relationship for the stress-strain of the human intestine was obtained, and the exponential coefficient α of each segment of the intestine is almost the same although the constant C is different. It also shows that the relative rate of stretch length of each segment intestines is different in longitudinal and circumferential directions. And the incremental elastic modulus of colon is less than those of small intestine. It is considered that the colon can be more easily deformed. The experimental results provide the theoretic basis for research on intestinal endoscopic mierorobot.

关 键 词：肠道 生物力学 拉伸试验 应力-应变关系 

分 类 号：R318.01[医药卫生—生物医学工程]