Biomechanical assessment of plantar foot tissue in diabetic patients using an ultrasound indentation system

被引:139
作者
Zheng, YP
Choi, YKC
Wong, K
Chan, S
Mak, AFT [1 ]
机构
[1] Hong Kong Polytech Univ, Rehabil Engn Ctr, Hong Kong, Hong Kong, Peoples R China
[2] Queen Mary Hosp, Dept Prosthet & Orthot, Hong Kong, Hong Kong, Peoples R China
关键词
biomechanics; diabetic foot; indentation test; plantar tissue; ultrasound instrumentation; ulceration;
D O I
10.1016/S0301-5629(99)00163-5
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
The biomechanical properties of plantar tissues were investigated for four older nenropathic diabetic patients and four healthy younger subjects. Indentation tests were performed at four high-pressure areas with three postures in each subject. The tissue thickness and effective Young's modulus were measured by an ultrasound (US) indentation system. The system comprised a pen-size probe having a US transducer at the tip and a load cell connected in series with it. Results showed that the plantar soft tissues of the elderly diabetic patients were significantly stiffer and thinner when compared with the healthy young subjects, For the diabetic subjects tested, the Young's modulus at the Ist metatarsal head was significantly larger than those at the other three sites. This site-dependence was not observed in the healthy young subjects, The plantar tissue became significantly stiffer in the healthy young subjects as a result of posture changes. This posture-dependence of the Young's modulus was not established for the elderly diabetic group. (C) 2000 World Federation for Ultrasound in Medicine & Biology.
引用
收藏
页码:451 / 456
页数:6
相关论文
共 24 条
[21]  
WERTSCH JJ, 1995, J REHABIL RES DEV, V32, P205
[22]   An ultrasound indentation system for biomechanical properties assessment of soft tissues in-vivo [J].
Zheng, YP ;
Mak, AFT .
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, 1996, 43 (09) :912-918
[23]  
Zheng YP, 1999, J REHABIL RES DEV, V36, P71
[24]  
ZHENG YP, 1999, IN PRESS IEEE T REHA, V7