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Method and apparatus for measuring the ohmic contact resistance of an electrode attached to body tissue

  • US 4,245,643 A
  • Filed: 08/15/1979
  • Issued: 01/20/1981
  • Est. Priority Date: 08/15/1979
  • Status: Expired due to Term
First Claim
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1. A method for measuring the ohmic contact resistance of an electrode attached to body tissue, the method including the steps of:

  • attaching the electrode to the body tissue;

    connecting a pulse generator having a given pulse amplitude and a given equivalent output impedance to the electrode, the pulse generator, electrode, and body tissue forming an electrical circuit;

    generating a pulse by means of the pulse generator;

    determining the instantaneous voltage across the body tissue and electrode at the onset of the pulse;

    deriving the ohmic contact resistance of the electrode based on the given amplitude, the given equivalent output impedance, and the instantaneous voltage; and

    displaying the ohmic contact resistance.

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