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Theses

Biomécanique des tissus mous de la jambe humaine sous compression élastique

Abstract : Elastic compression (EC) is a medical treatment prescribed in case of venous insufficiency. Recently, EC is also employed for recovery after efforts in sports. Nevertheless, despite the more and more common use of EC, its biomechanical action onto the lower limb remain partially unknown . To address this issue, a 3D biomechanical model of the soft tissues of the leg under EC has been developed and applied on a group of subjects. Each model is patient-specific: the geometry is reconstructed from the 3D CT-scan images of each subject’s legs and the boundary conditions are prescribed according to the local pressure applied by the EC onto the skin. Furthermore, the hyper-elastic properties of the soft tissues are identified for each subject using an inverse approach. The inverse approach is original: it consists in using the 3D CT-scan images of the deformed leg as experimental data for calibrating the model. The resulting model provides the pressure fields in the internal soft tissues induced by the EC. The main conclusions are that the pressure is not transmitted evenly and that significant inter-subject variability exists. Moreover, it is shown that the magnitude of the pressure undergone by the soft tissues is inversely proportional to the thickness of adipose tissues. The main perspectives of this work are to validate the conclusions on a significant number of subjects and to continue improving the treatments of venous insufficiency by EC.
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https://tel.archives-ouvertes.fr/tel-00716423
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Submitted on : Tuesday, July 10, 2012 - 2:54:19 PM
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  • HAL Id : tel-00716423, version 1

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Laura Dubuis. Biomécanique des tissus mous de la jambe humaine sous compression élastique. Autre. Ecole Nationale Supérieure des Mines de Saint-Etienne, 2011. Français. ⟨NNT : 2011EMSE0633⟩. ⟨tel-00716423⟩

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