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Characterization of alternating current impedance properties of biomedical electrodes

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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.

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Authors and Affiliations

  1. Department of Mechanical and Electrical Engineering, Xiamen University, Xiamen, 361005, China

    Wei Zhou  (周伟)

  2. School of Engineering, Sun Yat-sen University, Guangzhou, 510006, China

    Wei Zhou  (周伟), De-cai Cheng  (程德才), Rong Song  (宋嵘), Chun-jian Zhang  (张春健), Wen-ping Xu  (许文平) & Xiao-ling Pan  (潘晓玲)

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  1. Wei Zhou  (周伟)
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  2. De-cai Cheng  (程德才)
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  3. Rong Song  (宋嵘)
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  4. Chun-jian Zhang  (张春健)
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  5. Wen-ping Xu  (许文平)
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  6. Xiao-ling Pan  (潘晓玲)
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Corresponding author

Correspondence to Wei Zhou  (周伟).

Additional information

Foundation item: Project(111gpy06) supported by Fundamental Research Funds for the Central Universities, China; Project(101055807) supported by the Innovative Experiment Plan for College Students of Sun Yat-sen University, China; Project(KF201115) supported by the Opening Fund of Laboratory Sun Yat-sen University, China

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Zhou, W., Cheng, Dc., Song, R. et al. Characterization of alternating current impedance properties of biomedical electrodes. J. Cent. South Univ. 20, 1254–1258 (2013). https://doi.org/10.1007/s11771-013-1609-5

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  • DOI: https://doi.org/10.1007/s11771-013-1609-5

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