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Continuous monitoring of electrode-skin impedance mismatch during bioelectric recordings.
Journal article

Continuous monitoring of electrode-skin impedance mismatch during bioelectric recordings.

  • Degen T Swiss Federal Institute of Technology, CH-1015 Lausanne, Switzerland.
  • Jäckel H
  • 2008-08-22
Published in:
  • IEEE transactions on bio-medical engineering. - 2008
Algorithms
Computer Simulation
Computer-Aided Design
Electric Impedance
Electrocardiography, Ambulatory
Electrodes
Humans
Models, Biological
Reproducibility of Results
Sensitivity and Specificity
Skin Physiological Phenomena
English In bioelectric recordings, an electrode-skin impedance mismatch leads to a reduced common-mode rejection ratio (CMRR) of the amplifier. For this reason, the impedance of each individual electrode-skin contact is usually measured prior to a recording. The measurement circuit itself degrades the CMRR and is switched off during the bioelectric recording. In this paper, we present a new method that allows to monitor the electrode-skin impedance in a continuous way without reducing the CMRR of the amplifier. The new method is based on an additional common-mode signal that is superimposed on the bioelectric signal.
Language
  • English
Open access status
closed
Identifiers
Persistent URL
https://sonar.ch/global/documents/112152
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