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Method and system for electrode impedance measurement

  • US 9,980,662 B2
  • Filed: 05/18/2011
  • Issued: 05/29/2018
  • Est. Priority Date: 05/25/2010
  • Status: Active Grant
First Claim
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1. A device for the simultaneous measurement of electroencephalogram (EEG) signals and electrical impedance of applied (EEG) electrodes comprising:

  • at least three electrodes adapted to be attached to a subject, at least one electrode being for electrical grounding, at least one electrode providing a reference signal, and at least one EEG measurement electrode for acquisition of a physiological signal;

    a processor for collection of the physiological signal and determining the electrical impedance of each electrode individually;

    a variable current source capable of progressively increasing and decreasing electrical current for impedance measurement into the individual electrodes steadily over a period of time; and

    a monitor to display the EEG physiological signal and calculated electrical impedance for each electrode utilized.

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