角膜缝合张力分析与缝合效果评价

analysis and suturing performance evaluation of the suture in corneal suturing

根据角膜移植手术缝合的技术要求，建立了形状记忆合金（SMA）角膜缝线与角膜软组织作用的有限元模型，探究了缝线对粘弹性角膜的作用效果。按照缝线张力等要素与角膜组织最大变形的关系，建立了在临床手术中的缝合效果评价准则；根据缝线张力等要素对角膜组织最大应力的影响，进行了在微创伤方面的缝合效果评价。提出的缝合效果评价方法为角膜缝合操作提供了依据，为设计一种能够自成结的角膜缝线提供了研究基础。

According to the technical requirements for the corneal suturing in cornea transplantation, a finite element model for the interaction of the SMA （ shape memory alloy） suture for corneal suturing and the soft tissue of the cor- nea was built to explore the effect of the flexible suture on the viscoelastic cornea. Moreover, the influence of the suture tension on the maximum displacement and stress of the corneal tissue was analyzed. Subsequently, the sutu- ring performance evaluating method for the clinical surgery with minimal trauma was put forward. The proposed su- turing performance evaluating method can offer the reference information for suturing operations, which can lay a good foundation for the further research on the self-tying suture.