SENSOR FOR MEASURING RELATIVE CONDUCTIVITY CHANGES IN BIOLOGICAL TISSUE
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United States of America Patent
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Issued Date -
Mar 20, 2008
app pub date -
Sep 13, 2006
filing date -
Sep 13, 2006
priority date (Note) -
Abandoned
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Abstract
A sensor for detecting changes in electrical conductivity in a patient is disclosed. The sensor includes a transmit antenna that has an interior area bounded by a periphery. Importantly, the periphery includes an outer ring portion and an inner ring portion therein that partially surrounds an open area. Further, the sensor includes a receive antenna that has a substantially circular circumference that bounds an interior area. In order to balance the antennas, approximately half of the interior area of the receive antenna is superposed on the interior area of the second antenna. In operation, the antennas are positioned at a selected distance from one another near a patient. Then a signal is sent from the transmit antenna to the receive antenna. The signal is affected by the conductivity of the patient. As a result, the received signal may be monitored to detect electrical conductivity changes in the patient.
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