Krause Hannah, Bennett Michael, Forwood Mark, Goh Judith
QEII Hospital, Brisbane, Australia.
Int Urogynecol J Pelvic Floor Dysfunct. 2008 Dec;19(12):1677-81. doi: 10.1007/s00192-008-0711-y. Epub 2008 Sep 2.
Female urinary incontinence and pelvic organ prolapse are common conditions. The aim of this study was to assess the biomechanical properties of raw meshes commonly used in pelvic floor surgery, particularly the effects of cyclical loading on these meshes. The material properties of nine different types of surgical meshes were examined using uniaxial tensile tests. The strength and extensibility of the mesh designs differed considerably. Most mesh types exhibited curvilinear loading curves. Cyclical loading of mesh samples produced significant permanent deformation in all mesh designs. This non-recoverable extension ranged from about 8.5% to 19% strain. Hysteresis also varied considerably between materials from 30% to 85%. All mesh groups tested for their biomechanical properties displayed differences in results for failure load, stiffness, non-recoverable extension and hysteresis.
女性尿失禁和盆腔器官脱垂是常见病症。本研究的目的是评估盆底手术中常用的未处理网片的生物力学特性，尤其是循环加载对这些网片的影响。使用单轴拉伸试验检测了九种不同类型手术网片的材料特性。网片设计的强度和延展性差异很大。大多数网片类型呈现出曲线加载曲线。网片样本的循环加载在所有网片设计中都产生了显著的永久变形。这种不可恢复的伸长率范围约为8.5%至19%应变。不同材料之间的滞后现象也有很大差异，从30%到85%不等。所有测试生物力学特性的网片组在破坏载荷、刚度、不可恢复伸长率和滞后现象的结果上都存在差异。
