Characterization of alternating current impedance properties of biomedical electrodes
来源期刊：中南大学学报(英文版)2013年第5期
论文作者：周伟 CHENG De-cai(程德才) SONG Rong(宋嵘) ZHANG Chun-jian(张春健) XU Wen-ping (许文平) PAN Xiao-ling(潘晓玲)
文章页码：1254 - 1258
Key words：bioelectrical impedance; electrocardiograph electrodes; alternating current impedance; frequency properties; current properties
Abstract: To study the alternating current (AC) impedance properties of Ag/AgCl electrocardiograph (ECG) electrodes, the electrode pair was gel-to-gel connected, and then the electrical potential was recorded after a safe stimulating current passes through the electrode pair, so the AC impedance data of ECG electrodes were obtained. Varying the frequency and value of stimulating current, the detailed comparison and analysis of AC impedance properties of the electrodes were performed, and the stability was further characterized by using the continuous measurement within 24 h. The experimental results show that the AC impedance values of electrodes decreased, and then slightly increased with the increase of frequency of stimulating current. The minimum AC impedance value was obtained when the frequency was changed to 10 kHz. When the stimulating current increased, the AC impedance values of electrodes showed a slight decrease, but did not change significantly. Besides, the continuous measurement results show that the impedance value presented a significant increase in the initial 30 min, and then was stabilized in the following measuring process.
ZHOU Wei(周伟)1, 2, CHENG De-cai(程德才)2, SONG Rong(宋嵘)2, ZHANG Chun-jian(张春健)2, XU Wen-ping (许文平)2, PAN Xiao-ling(潘晓玲)2
(1. Department of Mechanical and Electrical Engineering, Xiamen University, Xiamen 361005, China;
2. School of Engineering, Sun Yat-sen University, Guangzhou 510006, China)
Abstract:To study the alternating current (AC) impedance properties of Ag/AgCl electrocardiograph (ECG) electrodes, the electrode pair was gel-to-gel connected, and then the electrical potential was recorded after a safe stimulating current passes through the electrode pair, so the AC impedance data of ECG electrodes were obtained. Varying the frequency and value of stimulating current, the detailed comparison and analysis of AC impedance properties of the electrodes were performed, and the stability was further characterized by using the continuous measurement within 24 h. The experimental results show that the AC impedance values of electrodes decreased, and then slightly increased with the increase of frequency of stimulating current. The minimum AC impedance value was obtained when the frequency was changed to 10 kHz. When the stimulating current increased, the AC impedance values of electrodes showed a slight decrease, but did not change significantly. Besides, the continuous measurement results show that the impedance value presented a significant increase in the initial 30 min, and then was stabilized in the following measuring process.
Key words:bioelectrical impedance; electrocardiograph electrodes; alternating current impedance; frequency properties; current properties
