Tian Hua, Luo Shiqiang, Zhang Rui, Yang Gang, Huang Hua
Biomedical Information Engineering Department, Sichuan University, Chengdu 610065, China.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2009 Dec;26(6):1349-52.
Frequency-domain electricity properties of four objects, including bullfrog skin, bullfrog muscle, triply distilled water and 0.9% NaCl, were tested in the range of 100Hz-10MHz using home-made electrode and measuring system. The experimental results showed that the resistance of 0.9% NaCl decreased dramatically, that the amplitude frequency characteristics of bullfrog's muscle and skin were similar, but that of triply distilled water did not change significantly. The frequency dependence of 0.9% NaCl showed that the electrode had great influence on the measuring system, so a new equivalent circuit model based on the electrode system was needed. These findings suggest that the new five-parameter equivalent circuit model, which embodies considerations on the interaction between electrodes and tissues, is a reasonable equivalent circuit for studying the electrical characteristics of biological materials.
使用自制电极和测量系统，在100Hz - 10MHz范围内测试了四种物体（包括牛蛙皮肤、牛蛙肌肉、三次蒸馏水和0.9% NaCl）的频域电学特性。实验结果表明，0.9% NaCl的电阻急剧下降，牛蛙肌肉和皮肤的幅频特性相似，但三次蒸馏水的幅频特性变化不显著。0.9% NaCl的频率依赖性表明电极对测量系统有很大影响，因此需要基于电极系统的新等效电路模型。这些发现表明，体现了电极与组织之间相互作用考虑因素的新五参数等效电路模型，是研究生物材料电学特性的合理等效电路。
