Mak A F, Huang L, Wang Q
Rehabilitation Engineering Centre, Hong Kong Ploytechnic, Hunghom.
J Biomech Eng. 1994 Nov;116(4):421-9. doi: 10.1115/1.2895793.
A layer of skin and subcutaneous tissue on a bony substratum was modeled as a homogeneous layer of biphasic poroelastic material with uniform thickness. The epidermal surface and the bony interface were taken to be impervious. The soft tissue on the bony interface was assumed either fully adhered or completely free to slide on the bone. The cases for surface pressure loadings and displacement controlled indentations were simulated. The resultant biomechanical responses of the layer, including the transient tissue hydrostatic pressure and the tissue compaction, were presented. A new hypothesis is offered to interpret the threshold pressure-time curve for pressure sores in term of the time required for a particular area in the tissue layer to reach a critical compaction for a given level of applied pressure.
将位于骨质基底上的一层皮肤和皮下组织建模为具有均匀厚度的双相多孔弹性材料的均匀层。表皮表面和骨质界面被视为不透水的。假定骨质界面上的软组织要么完全粘附在骨头上，要么可以在骨头上完全自由滑动。模拟了表面压力加载和位移控制压痕的情况。给出了该层产生的生物力学响应，包括瞬态组织静水压力和组织压实情况。提出了一个新的假设，以根据组织层中特定区域在给定施加压力水平下达到临界压实所需的时间来解释压疮的阈值压力-时间曲线。
