...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>American journal of applied sciences >Investigations on the Grasping Contact Analysis of Biological Tissues With Applications in Minimally Invasive Surgery | Science Publications
【24h】

Investigations on the Grasping Contact Analysis of Biological Tissues With Applications in Minimally Invasive Surgery | Science Publications

机译：生物组织的抓取性接触分析及其在微创手术中的应用研究科学出版物

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

> Analytical and finite element methods are employed to determine the contact pressure on the surface of a tissue being grasped by an endoscopic grasper, in Minimally Invasive Surgery (MIS). Normally, an endoscopic grasper is corrugated (teeth-like) in order to grasp slippery tissues. It is highly important to avoid damage to the tissues while grasping and manipulation during endoscopic surgery. Therefore, it is essential to determine the exact contact pressure on the surface of the tissue. To this end, initially a comprehensive closed form, finite element and experimental analysis of grasping contact pressure on viscoelastic materials which have similar properties as that of biological tissues is studied. The behavior of a grasper with wedge-like teeth, when pressed into a linear viscoelastic material is examined. Initially, a single wedge penetrating into a solid is studied and then is extended to the grasper. The elastic wedge indentation is the basis of the closed form analysis and the effects of time are included in the equations by considering the corresponding integral operator from viscoelastic stress-stain relations. In addition, a finite element analysis is carried out in Ansys-10 software. Finally, the experimental results are presented to validate both analytical and FEM results. The results of this study provide a closed form expression for grasping contact pressure force and contact area along with the variations of stress in tissue obtained through FEM analysis. The variation of contact pressure and the rate of growth of the contact area with time are presented.
机译： >在微创手术（MIS）中，采用分析和有限元方法确定由内窥镜抓取器抓取的组织表面的接触压力。通常，内窥镜抓握器是波纹状的（牙齿状的），以便抓握光滑的组织。在内窥镜手术中进行抓握和操作时，避免损坏组织非常重要。因此，必须确定组织表面上的确切接触压力。为此，首先研究了具有与生物组织相似特性的粘弹性材料上的接触压力的全面闭合形式，有限元和实验分析。检查了带有楔形齿的抓取器在压入线性粘弹性材料时的行为。最初，研究了一个单楔入固体的楔形，然后将其扩展到抓取器。弹性楔形压痕是闭合形式分析的基础，并且通过从粘弹性应力-染色关系考虑相应的积分算子，将时间的影响包括在方程中。另外，在Ansys-10软件中进行了有限元分析。最后，给出了实验结果以验证分析和有限元结果。这项研究的结果提供了一种闭合形式的表达式，用于掌握通过FEM分析获得的接触压力和接触面积以及组织中应力的变化。提出了接触压力的变化和接触面积随时间的增长速率。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号