Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Frequency Response of the electrode for Indirect-contact ECG

간접접촉 심전도 측정용 전극의 주파수 특성

  • Lim, Yong-Gyu (Department of Oriental Biomedical Engineering, Sangji University)
  • 임용규 (상지대학교 한방의료공학과)
  • Published : 2008.06.30
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Abstract

The indirect-contact ECG (IDC-ECG) was introduced by a prior study for daily non-intrusive measurements. To improve the signal quality and to extend the application area of IDC-ECG, close study of the frequency characteristics of the IDC-ECG is necessary. In this study, the frequency response of the active electrode for several sample clothes was measured under conditions of actual IDC-ECG measurement with human body. Higher gain in low frequency range than expected by prior study was observed. In addition to it, wide variation in gain according to the cloth type in the low frequency range was observed. Variation in gain caused by moisture variation in the clothes was also observed. This study shows that the parallel R-C connection is proper for electrode model and the resistive factor is influenced by moisture in the clothes. This study is the first that provides the frequency response of the electrode in the actual indirect-contact ECG measurement and it is expected that the results will be helpful to improve the indirect-contact ECG method.

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References

  1. Y. G. Lim, K. K. Kim, and K. S. Park, 'ECG measurement on a chair without conductive contact,' IEEE Trans Biomed Eng, vol. 53, pp.956-9, 2006 https://doi.org/10.1109/TBME.2006.872823
  2. K. K. Kim, Y. G. Lim, and K. S. Park, 'A New Method for Unconstrained Pulse Arrival Time (PAT) Measurement on a Chair,' J. of Biomed. Eng. Res., pp. 83-88, 2006
  3. J. Kim, J. Park, K. Kim, Y. Chee, Y. Lim, and K. Park, 'Development of a nonintrusive blood pressure estimation system for computer users,' Telemed J E Health, vol. 13, pp. 57-64, 2007 https://doi.org/10.1089/tmj.2006.0034
  4. Y. G. Lim, K. K. Kim, and K. S. Park, 'ECG recording on a bed during sleep without direct skin-contact,' IEEE Trans Biomed Eng, vol. 54, pp. 718-25, 2007 https://doi.org/10.1109/TBME.2006.889194
  5. K. K. Kim, Y. G. Lim, J. S. Kim, and K. S. Park, 'Effect of missing RR-interval data on heart rate variability analysis in the time domain,' Physiol Meas, vol. 28, pp. 1485-94, 2007 https://doi.org/10.1088/0967-3334/28/12/003
  6. S. Boutros and A. A. Hanna, 'Some Electrical Properties of Wood Pulp,' J. of Polymer Science, vol. 16, pp. 1443-1448, 1978
  7. E. H. Jones, 'A Moisture Meter for Textile Materials,' J. Sci. Instrum., vol. 17, pp. 55-62, 1940 https://doi.org/10.1088/0950-7671/17/3/302
  8. A. Searle and L. Kirkup, 'A direct comparison of wet, dry and insulating bioelectric recording electrodes,' Physiol Meas, vol. 21, pp. 271-83, 2000 https://doi.org/10.1088/0967-3334/21/2/307
  9. R. M. David and W. M. Portnoy, 'Insulated electrocardiogram electrodes,' Med Biol Eng, vol. 10, pp. 742-51, 1972 https://doi.org/10.1007/BF02477385
  10. M. E. Griffith, W. M. Portnoy, L. J. Stotts, and J. L. Day, 'Improved capacitive electrocardiogram electrodes for burn applications,' Med Biol Eng Comput, vol. 17, pp. 641-6, 1979 https://doi.org/10.1007/BF02440910
  11. C. H. Lagow, K. J. Sladek, and P. C. Richardson, 'Anodic insulated tantalum oxide electrocardiograph electrodes,' IEEE Trans Biomed Eng, vol. 18, pp. 162-4, 1971 https://doi.org/10.1109/TBME.1971.4502820