Autors: Petrova, G. I.
Title: Influence of electrode impedance changes on the common-mode rejection ratio in bioimpedance measurements
Keywords: CMRR, bioelectrical impedance, electrode-skin impedance

Abstract: Bioelectrical impedance in vivo measurements suffer from many potential sources of error due to the patient-instrument interface. The total common-mode rejection ratio (CMRRT) was investigated experimentally for three measurement channel circuit versions, including electrode-skin impedance imbalance. The first version was of the `classical' type. The second one makes use of a differential filter at the input of the instrumentation amplifier. The third circuit was a frequency-converting structure, where the signal was demodulated before being amplified. The differential demodulator was based on synchronous sampling using floating capacitors. The experiments were accomplished with simulated imbalance of the real and imaginary parts of electrode-skin impedances. To reduce unwanted common-mode voltage, a differential accurately balanced current source was used. Considering an application in impedance cardiography, the experiments were carried out at a single frequency of 40 kHz.

References

    Issue

    Physiological Measurement, vol. 20, issue 4, pp. N11, 1999, United States, IOP, ISSN 0967-3334

    Цитирания (Citation/s):
    1. A Comparison of Front-End Amplifiers for Tetrapolar Bioimpedance Measurements - 2021 - в издания, индексирани в Scopus или Web of Science
    2. Wireless, Artefact Aware Impedance Sensor Node for Continuous Bio-Impedance Monitoring - 2020 - в издания, индексирани в Scopus или Web of Science
    3. Fabrication of PPy/PVC Electrodes for ECG Monitoring - 2020 - в издания, индексирани в Scopus или Web of Science
    4. Problems encountered during inappropriate use of commercial bioimpedance devices in novel applications - 2017 - в издания, индексирани в Scopus или Web of Science
    5. Electrodes based on PPy polymer for electrocardiography and impedance plethysmography - 2017 - в издания, индексирани в Scopus или Web of Science
    6. Sensors based on conducting polymers for measurement of physiological parameters - 2017 - в издания, индексирани в Scopus или Web of Science
    7. Multifrequency right-side, localized and segmental BIA obtained with different bioimpedance analysers - 2015 - в издания, индексирани в Scopus или Web of Science
    8. New techniques to reduce the common-mode signal in multi-frequency EIT applications - 2011 - в издания, индексирани в Scopus или Web of Science
    9. An integrated common-mode feedback topology for multi-frequency bioimpedance imaging - 2009 - в издания, индексирани в Scopus или Web of Science
    10. Simple electrode contact monitoring for home healthcare device - 2008 - в издания, индексирани в Scopus или Web of Science
    11. Relative measurement of differential electrode impedance for contact monitoring in a biopotential amplifier - 2007 - в издания, индексирани в Scopus или Web of Science
    12. An instrumentation amplifier as a front-end for a four-electrode bioimpedance measurement - 2007 - в издания, индексирани в Scopus или Web of Science
    13. Evolution in impedance at the electrode-skin interface of two types of surface EMG electrodes during long-term recordings - 2003 - в издания, индексирани в Scopus или Web of Science
    14. ImpediSense:A long lasting wireless wearable bio-impedance sensor node - 2021 - в издания, индексирани в Scopus или Web of Science
    15. Towards Artefact-Free Bio-Impedance Measurements: Evaluation, Identification and Suppression of Artefacts at Multiple Frequencies - 2022 - в издания, индексирани в Scopus или Web of Science
    16. Niederhoffer, T., Vanhoestenberghe, A., Lancashire, H.T., Methods of poly(3,4)-ethylenedioxithiophene (PEDOT) electrodeposition on metal electrodes for neural stimulation and recording, Journal of Neural Engineering 20(1),011002 - 2023 - в издания, индексирани в Scopus или Web of Science

    Вид: статия в списание, публикация в издание с импакт фактор, публикация в реферирано издание, индексирана в Scopus