ブタ後ろ足皮膚表面のずれで生じる皮下組織のひずみ状態の解析

抄録

The deformation of soft tissues determines a microvascular closure under loading on the skin surface, which may lead to pressure ulcer. The load has two components, i.e., pressure and shear force. We measured the deformation of skin, subcutaneous tissue (ST) and skeletal muscle (SM) with shear of skin surface for twelve side surfaces in six porcine hind feet in a previous study. In this study we referred to a Cartesian coordinate system with an axis parallel to the path of a point on the side surface of the skin and analyzed the shear deformation of ST to obtain the relationships between the shear strain of ST and the displacement of skin and the relationships of displacements between two points. The results agreed with the three categorized cases, i.e., a case in which the ST followed the skin but the SM did not, a case in which ST and SM followed the skin to a certain degree, and a case in which the ST had a large shear deformation and followed the skin but the SM did not. The results suggest that the shear deformation of ST depends on the connectivity of ST with the skin and the SM. The deformation of the ST may govern the blood circulation under external loading.