Zheng Y P, Choi Y K, Wong K, Chan S, Mak A F
Rehabilitation Engineering Center, The Hong Kong Polytechnic University, Hong Kong, People's Republic of China.
Ultrasound Med Biol. 2000 Mar;26(3):451-6. doi: 10.1016/s0301-5629(99)00163-5.
The biomechanical properties of plantar tissues were investigated for four older neuropathic 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 1st 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.
对4名老年神经性糖尿病患者和4名健康年轻受试者的足底组织生物力学特性进行了研究。在每个受试者的四个高压区域以三种姿势进行压痕测试。通过超声（US）压痕系统测量组织厚度和有效杨氏模量。该系统包括一个笔大小的探头，其尖端有一个超声换能器以及与之串联的一个称重传感器。结果表明，与健康年轻受试者相比，老年糖尿病患者的足底软组织明显更硬且更薄。对于所测试的糖尿病受试者，第一跖骨头处的杨氏模量明显大于其他三个部位。在健康年轻受试者中未观察到这种部位依赖性。由于姿势改变，健康年轻受试者的足底组织明显变硬。老年糖尿病组未出现杨氏模量的这种姿势依赖性。
