Apparatus and method for impedance measurement of body tissues
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United States of America Patent
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Apr 25, 1989
Grant Date -
N/A
app pub date -
Jun 15, 1987
filing date -
Jun 16, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus for impedance measurement of body tissue has a signal source which impresses an electrical signal in body tissue, circuitry for acquiring an impedance signal from the body tissue dependent on the impressed electrical signal, and an evaluation stage for evaluating the impedance signal by filtering higher frequency components and low frequency components from the impedance signal which correspond to the conductance of the tissue. A correction stage corrects the high frequency signal components with the low frequency signal components by eliminating the higher frequency signal components of influences due to changes in the tissue conductance. The corrected signal is supplied at an output of the correction stage.
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