Method and apparatus for controlling contact of biomedical electrodes with patient skin
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United States of America Patent
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-
Jan 9, 2001
Grant Date -
N/A
app pub date -
Feb 23, 1999
filing date -
Apr 4, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of monitoring the contact of a biomedical electrode to skin of a patient is disclosed, where the phase angle of current flow through one portion of the electrode is compared to the phase angle of current flow through another portion of the electrode. The two portions are both electrical conductors, one having a lossy dielectric surface and the other bare metal. Any monitoring of an electrical interface is possible based on the difference in phase angle. Lift of any portion of the electrode from contact with skin of a patient can be monitored more easily than using conventional Contact Quality Monitoring circuitry and 'split plate patient plates.'
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