冷冻储藏对心肌力学性能的影响

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...

Effects of freezing storage on mechanical properties of myocradium

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.