Dubuis L, Avril S, Debayle J, Badel P
Center for Health Engineering, École des Mines de Saint-Étienne, Saint-Étienne, France.
Comput Methods Biomech Biomed Engin. 2012;15(1):3-11. doi: 10.1080/10255842.2011.560666. Epub 2011 Aug 2.
Elastic compression is recommended in prophylaxis and the treatment of venous disorder of the human leg. However, the mechanisms of compression are not completely understood and the response of internal tissues to the external pressure is partially unknown. To address this later issue, a 3D FE model of a human leg is developed. The geometry is derived from 3D CT scans. The FE model is made up of soft tissues and rigid bones. An inverse method is applied to identify the properties of soft tissues which are modelled as hyperelastic, near-incompressible, homogeneous and isotropic materials. The principle is to calibrate the constitutive properties using CT scans carried out with and without the presence of a compression sock. The deformed geometry computed by the calibrated FE model is in agreement with the geometry deduced from the CT scans. The model also provides the internal pressure distribution, which may lead to medical exploitation in the future.
弹性压迫法被推荐用于预防和治疗人类腿部的静脉疾病。然而，压迫的机制尚未完全了解，内部组织对外界压力的反应也部分未知。为了解决后一个问题，开发了一个人类腿部的三维有限元模型。其几何形状源自三维CT扫描。有限元模型由软组织和刚性骨骼组成。应用一种反演方法来识别软组织的特性，这些软组织被建模为超弹性、近不可压缩、均匀且各向同性的材料。其原理是使用在有和没有压迫袜的情况下进行的CT扫描来校准本构特性。经校准的有限元模型计算出的变形几何形状与从CT扫描推断出的几何形状一致。该模型还提供了内部压力分布，这可能在未来用于医学应用。
