新型内镜连续止血闭合器械的设计与分析

发布时间：2018-03-31 20:20

本文选题：内窥镜　切入点：金属夹　出处：《医用生物力学》2015年05期

【摘要】：目的设计一种新型内镜连续止血闭合器械,并进行有限元分析,验证其是否满足实现组织闭合功能的设计要求。方法在器械抓钳聚拢目标组织后推送金属夹,使其部分穿透组织,通过金属夹与抓钳内壁的相互挤压强迫金属夹细臂弯曲闭合,完成施夹后金属夹留在组织上,并对金属夹施加2 mm反向位移。设定金属夹材料弹性极限为239.0 MPa,抗拉强度为901.0 MPa。结果在穿刺组织过程中金属夹没有发生变形,最大应力为212.6 MPa;在闭合过程中变形符合设计预期,最大应力为727.7 MPa;在反向2 mm位移下金属夹最大应力为75.8 MPa。金属夹在施夹过程和2 mm位移作用下材料均未失效,最大总应力为741.0 MPa。结论设计的新型内镜连续止血闭合器械能够一次性施放4个金属夹,具备用于聚拢组织的独立抓钳,能够减少更换金属夹的时间并提高施夹准确性,同时有限元方法验证了器械在使用过程中是安全可靠的。
[Abstract]:Objective to design a new type of continuous endoscopic hemostatic closure devices, and finite element analysis, to verify whether it meets the requirements of design to achieve organizational function. The instrument in a closed grab gather target tissue push metal clip, the partial penetrating tissue, through the metal clip and the inner wall of the grasping forceps squeezing force metal clip thin arm bending closed, complete application of metal clips in the tissue after clamp, and applied 2 mm reverse displacement of metal metal clip clip. Set the elastic limit of the material is 239 MPa, the tensile strength is 901 MPa. results in biopsy during metal clip no deformation, the maximum stress is 212.6 MPa; the expected deformation in the closing process, the maximum stress is 727.7 MPa; the metal clip the maximum stress is 75.8 MPa. metal clip in the clip application process and 2 mm displacement under the action of the materials were not failure in the reverse displacement of 2 mm, the maximum stress is 741 MP Conclusion A. design of new endoscopic hemostatic closure device can continuously cast 4 metal clips, with independent organizations gather for grasper, can reduce the time for replacing the metal clip and improve the application of clamping accuracy, while the finite element method is verified in the process of using the equipment is safe and reliable.

【作者单位】：上海理工大学教育部微创医疗器械工程研究中心;第二军医大学附属东方肝胆外科医院内镜科;
【基金】：国家自然科学基金项目(81171484,51175345)
【分类号】：R197.39

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