腹腔镜夹钳开窗设计对夹持稳定性影响研究

doi:10.3901/JME.2018.17.008

机械工程学报 ›› 2018, Vol. 54 ›› Issue (17): 8-13.doi: 10.3901/JME.2018.17.008

• 特邀专栏：精准微创手术器械创成与制造基础 • 上一篇下一篇

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腹腔镜夹钳开窗设计对夹持稳定性影响研究

马力¹, 王冰瑞¹, 李炜¹, 王国慧², 朱晒红², 周仲荣¹

1. 西南交通大学材料先进技术教育部重点实验室成都 610031;
2. 中南大学湘雅三医院长沙 410013

收稿日期:2018-01-07 修回日期:2018-05-04 出版日期:2018-09-05 发布日期:2018-09-05
通讯作者: 李炜(通信作者),女,1969年出生,博士,研究员。主要研究方向为生物摩擦学、材料科学工程。E-mail:liweijiani@home.swjtu.edu.cn
作者简介:马力,男,1993年出生。主要研究方向为机械设计及理论。E-mail:mali@my.swjtu.edu.cn
基金资助:
国家自然科学基金资助项目（51290291，51675447）。

Effect of Fenestrations in Laparoscopic Grasper on the Clamping Stability

MA Li¹, WANG Bingrui¹, LI Wei¹, WANG Guohui², ZHU Shaihong², ZHOU Zhongrong¹

1. Key Laboratory for Advanced Technology of Materials of Ministry of Education, Southwest Jiaotong University, Chengdu 610031;
2. The Third Xiangya Hospital of Central South University, Changsha 410031

Received:2018-01-07 Revised:2018-05-04 Online:2018-09-05 Published:2018-09-05

摘要/Abstract

摘要： 在多功能摩擦磨损试验机上模拟微创手术中的组织夹持牵引操作，研究了钳头与猪肝脏组织间的摩擦学行为，并基于钳头与组织间的夹持应力分布数值模拟结果，探讨了不同的腹腔镜开窗钳头与肝脏组织的相互作用行为。结果表明：在接触系数相同的情况下，开窗数量的增加有助于增大滑动摩擦力；三正方形开窗钳头由于开窗轮廓最长，在与组织相互作用过程中，使组织在轮廓边缘产生了更多的变形，有利于嵌入组织，与肝脏组织之间产生的能量耗散及滑动摩擦力最大，夹持稳定性最好；对于相同类型的矩形开窗钳头，接触系数存在一个阈值，当接触系数小于该阈值时，随着接触系数的减小，摩擦力减小，夹持稳定性会降低；钳头与肝脏组织接触过程中，较大的接触应力集中在钳头端部边缘和开窗轮廓边缘与肝脏组织接触处。

关键词: 腹腔镜夹钳, 夹持稳定性, 接触系数, 开窗, 摩擦行为, 猪肝脏

Abstract: The frictional behaviors between the fenestrated jaws of laparoscopic grasper and the liver tissue are investigated by using a UMT-Ⅱseries multi-specimen biomedical micro-tribometer to simulate the surgical manipulation and traction. Based on the numerical simulation results of the clamping stress distribution between the jaws and the liver tissue, the interaction behaviors between the different fenestrated-jaws and the liver tissue are also discussed. The results show that under the same contact coefficient, increasing of the number of fenestrated holes can help to enhance the sliding friction. The jaw with three squares fenestrations has the longest contour line, and causes more deformation in the tissue at the edge of the fenestrations during the interaction with the liver tissue, which helps the tissue embed into the fenestration. Since this type of fenestrated jaw can produce the largest energy dissipation and the sliding friction, its holding stability is the best. For the same type of rectangular opening jaws, there exists a threshold value of contact coefficient. The stability of the grasper declines with decreasing contact coefficient when the contact coefficient is less than the threshold. In addition, in the contact process of the jaws and the liver tissues, the greater contact stress is concentrated at the edge of the two ends of jaw and the edge of the open window during the contact process between the jaws and the liver tissue.

Key words: clamping stability, contact coefficient, fenestrations, friction behavior, laparoscopic grasper, porcine liver

中图分类号:

TH117

马力, 王冰瑞, 李炜, 王国慧, 朱晒红, 周仲荣. 腹腔镜夹钳开窗设计对夹持稳定性影响研究[J]. 机械工程学报, 2018, 54(17): 8-13.

MA Li, WANG Bingrui, LI Wei, WANG Guohui, ZHU Shaihong, ZHOU Zhongrong. Effect of Fenestrations in Laparoscopic Grasper on the Clamping Stability[J]. Journal of Mechanical Engineering, 2018, 54(17): 8-13.

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腹腔镜夹钳开窗设计对夹持稳定性影响研究

Effect of Fenestrations in Laparoscopic Grasper on the Clamping Stability

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