Zheng Y, Mak A F
Rehabilitation Engineering Center, The Hong Kong Polytechnic University, Kowloon.
IEEE Trans Rehabil Eng. 1999 Sep;7(3):257-67. doi: 10.1109/86.788463.
Quantitative assessment of the biomechanical properties of limb soft tissues has become more important during the last decade because of the introduction of computer-aided design and computer-aided manufacturing (CAD/CAM) and finite element analysis to the prosthetic socket design. Because of the lack of a clinically easy-to-use apparatus, the site and posture dependences of the material properties of lower limb soft tissues have not been fully reported in the literature. In this study, an ultrasound indentation system with a pen-size hand-held probe developed earlier by the authors was used to obtain the indentation responses of lower limb soft tissues. Indentation tests were conducted on normal young subjects with four females and four males at four sites with three body postures. A linear elastic indentation solution was used to extract the effective Young's modulus from the indentation responses. The determined modulus ranged from 10.4 to 89.2 kPa for the soft tissues tested. These results were in a similar range as those reported in the literature. The thickness of the lower limb soft tissues varied slightly with body posture changes. The Young's modulus determined was demonstrated to be significantly dependent on site, posture, subject and gender. The overall mean modulus of male subjects was 40% larger than that of female subjects. No significant correlation was established between the effective Young's modulus and the thickness of entire soft tissue layers.
在过去十年中，由于计算机辅助设计与计算机辅助制造（CAD/CAM）以及有限元分析被引入假肢接受腔设计，对肢体软组织生物力学特性的定量评估变得越发重要。由于缺乏临床上易于使用的设备，下肢软组织材料特性的部位和姿势依赖性在文献中尚未得到充分报道。在本研究中，作者先前开发的一种带有笔式手持探头的超声压痕系统被用于获取下肢软组织的压痕响应。对4名女性和4名男性的正常年轻受试者在四个部位、三种身体姿势下进行了压痕测试。使用线性弹性压痕解从压痕响应中提取有效杨氏模量。所测软组织的确定模量范围为10.4至89.2 kPa。这些结果与文献报道的结果在相似范围内。下肢软组织的厚度随身体姿势变化略有不同。所确定的杨氏模量被证明显著依赖于部位、姿势、受试者和性别。男性受试者的总体平均模量比女性受试者大40%。有效杨氏模量与整个软组织层的厚度之间未建立显著相关性。
