冷冻储藏对心肌力学性能的影响  

Effects of freezing storage on mechanical properties of myocradium

作　　者：杨阳[1] 贾云超 荆腾[1] 曾培[1] 陆建飞[2] 贺照明[1,3] YANG Yang;JIA Yunchao;JING Teng;ZENG Pei;LU Jianfei;HE Zhaoming(National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China;Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu 212013, China;Department of Mechanical Engineering, Texas Tech University, Lubbock, Texas 79409, USA)

机构地区：[1]江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013 [2]江苏大学土木工程与力学学院,江苏镇江212013 [3]德州理工大学机械工程系,美国拉伯克TX79409

出　　处：《排灌机械工程学报》2022年第2期170-174,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金：江苏省自然科学基金项目(BK20170552);江苏省博士后科研资助计划项目(1701063C);国家自然科学基金资助项目(31600794)。

摘　　要：为了研究冷冻贮藏对心尖组织力学性能的影响,将心尖组织冷冻48 h并对冷冻后的组织样本和新鲜无冷冻的样本分别进行双向拉伸,讨论并分析在纤维方向和交叉纤维方向上新鲜无冷冻样本和冷冻样本的力学特性有无显著性差异.试验研究的力学参数有在纤维方向和交叉纤方向上的峰值拉伸比、力学拉伸比、预加载拉伸比、低应力区域的弹性模量、高应力区域的弹性模量、各向异性指数和延展性指数.研究结果显示,新鲜无冷冻的样本组织与冷冻组织的峰值拉伸比、力学拉伸比、预加载拉伸比、低应力区域的弹性模量、高应力区域的弹性模量、各向异性指数和延展性指数均无统计学差异.另外,试验发现冷冻组织比新鲜组织的各向异性略强,但新鲜无冷冻组织比冷冻组织略硬.冷冻贮藏对心尖组织的力学性能无显著影响.This study was to investigate the effect of freezing-based storage on the mechanical properties of apical tissues.The apical tissue was froze for 48 hours and biaxial stretching of the frozen tissue sample and the fresh sample was performed respectively.Whether the mechanical properties of the fresh sample and the frozen sample in the fiber direction and the cross fiber direction are significant difference was discussed and analyzed.The mechanical parameters studied in the experiment include the peak stretch ratio in the fiber direction and the cross-fiber direction,the mechanical stretch ratio,the preload stretch ratio,the elastic modulus in the low-stress area,the elastic modulus in the high-stress area,and the anisotropy index and ductility index.There are no statistical difference in the peak stretch ratio,mechanical stretch ratio,preload stretch ratio,elastic modulus of low stress area,elastic modulus of high stress area,anisotropy index and ductility index of fresh and unfrozen sample tissue to frozen tissue.In addition,the experiment finds that the anisotropy of frozen tissue is slightly stronger than that of fresh tissue,but fresh tissue is slightly harder than frozen tissue.Freezing-based storage has no significant effect on the mechanical properties of apical tissues.

关 键 词：心尖组织 冷冻储藏 统计学差异 双向拉伸 力学性能 

分 类 号：R318[医药卫生—生物医学工程]