Surgery: light – thermal – and electrical application – Light – thermal – and electrical application – Electrical therapeutic systems
Patent
1992-03-26
1994-02-01
Kamm, William E.
Surgery: light, thermal, and electrical application
Light, thermal, and electrical application
Electrical therapeutic systems
607 6, 128734, A61N 1362
Patent
active
052828409
ABSTRACT:
A physiological monitoring system for monitoring the condition of a patient's body tissue. The device includes electrodes for contacting the tissue to be monitored, circuitry for generating electrical signals at at least two frequencies for application to the tissue and circuitry for monitoring the impedance of the tissue, at the frequencies applied. The device includes in addition apparatus for detecting changes in the relationship of the measured impedances at the frequencies applied, and for processing the detected changes in impedance relationship to provide an indication of the condition of the tissue. The monitoring apparatus may be practiced in the context of an implantable stimulator, such as a cardiac pacemaker, in which the pulse frequency is varied as a function of the detected condition of the tissue.
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Bioelectric Amplifiers in Introduction to Biomedical Equipment Technology, by Carr and Brown, John Wiley & Sons, 1981, pp. 41-44.
Duthler Reed A.
Getzow Scott M.
Kamm William E.
Medtronic Inc.
Patton Harold R.
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