角膜缝合操作建模及有限元仿真规划

Model establishment and finite element planning for suturing manipulation in corneal surgery

角膜缝合操作是角膜移植成功的关键。首先,通过分析角膜的缝合操作过程,建立了角膜移植缝合过程的几何模型。在不考虑角膜组织黏弹性的条件下,进行了单个缝合过程的路径规划。在此基础上,考虑角膜组织缝合过程中的弹性,利用有限元分析软件ANSYS对角膜缝合过程进行了模拟,规划了缝针在角膜组织变形条件下的工作路径,并计算出缝针在缝合过程中的位置与姿态变化曲线。实验结果可用于指导角膜缝合机器人完成缝合操作任务。

Suturing is the key to the success of corneal transplant surgery. By analyzing the suturing-process of corneal, a model for suturing was established. A suturing theorietical trajectery was proposed without considering the viso-elasticity of corneal. Then, a suturing simulation was done with the ANSYS software, the manipulating trajectory was planned for corneal soft-tissue with viso-elasticity, correspondingly, and the position and posture of needle in suturing were obtained. The study can be used for suturing manipulation in cornea suture surgical.