Mechanical behaviour of synthetic surgical meshes: Finite element simulation of the herniated abdominal wall
Mechanical behaviour of synthetic surgical meshes: Finite element simulation of the herniated abdominal wall
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DOI：
10.1016/j.actbio.2011.06.033
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发表时间：
2011-11-01
影响因子：
9.7
通讯作者：
Calvo, B.
中科院分区：
文献类型：
--
作者：
Hernandez-Gascon, B.;Pena, E.;Calvo, B.
疝气手术中使用的网片的材料特性有助于修复腹壁的整体机械行为。必须定义手术网片的机械响应，因为各向异性网片的随意方向可能导致手术结果不一致。本研究旨在表征三种手术网片（Surgipro (R)、Optilene (R) 和 Infinit (R)）的机械行为，并描述准确再现实验结果的机械本构定律。最后，通过有限元模拟，对手术网片植入前后腹壁的行为进行建模。网片样品在两个垂直方向的单轴加载揭示了 Surgipro (R) 的各向同性响应以及 Optilene (R) 和 Infinit (R) 的各向异性行为。采用现象学本构定律重现测量的实验曲线。为了分析网片植入腹部后的力学效应，对健康和部分疝气修复的兔子腹壁进行有限元模拟，以重现网片植入前后的壁行为。在所有情况下，与完整壁模型相比，植入腹部的最大位移较低，最大主应力较高。尽管没有任何网格表现出与腹肌完全匹配的行为，但 Infinit (R) 网格能够最好地符合腹壁的生物力学。 (C) 2011 Acta Materialia Inc. 由 Elsevier Ltd 出版。保留所有权利。
The material properties of meshes used in hernia surgery contribute to the overall mechanical behaviour of the repaired abdominal wall. The mechanical response of a surgical mesh has to be defined since the haphazard orientation of an anisotropic mesh can lead to inconsistent surgical outcomes. This study was designed to characterize the mechanical behaviour of three surgical meshes (Surgipro (R), Optilene (R) and Infinit (R)) and to describe a mechanical constitutive law that accurately reproduces the experimental results. Finally, through finite element simulation, the behaviour of the abdominal wall was modelled before and after surgical mesh implant.Uniaxial loading of mesh samples in two perpendicular directions revealed the isotropic response of Surgipro (R) and the anisotropic behaviour of Optilene (R) and Infinit (R). A phenomenological constitutive law was used to reproduce the measured experimental curves.To analyze the mechanical effect of the meshes once implanted in the abdomen, finite element simulation of the healthy and partially herniated repaired rabbit abdominal wall served to reproduce wall behaviour before and after mesh implant. In all cases, maximal displacements were lower and maximal principal stresses higher in the implanted abdomen than the intact wall model. Despite the fact that no mesh showed a behaviour that perfectly matched that of abdominal muscle, the Infinit (R) mesh was able to best comply with the biomechanics of the abdominal wall. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.