Surgery – Truss – Pad
Patent
1982-12-30
1985-04-16
Cohen, Lee S.
Surgery
Truss
Pad
128671, A61B 502
Patent
active
045109443
ABSTRACT:
A method and apparatus is disclosed for detecting amplitude variations in the rhythmic oscillations of a physiological response pattern in a frequency range of interest. A sensor is used to detect an occurrence of an event in the cycle of a physiological response and the intervals between each reoccurring event is timed and placed in a buffer. The output from the buffer is readout at predetermined time intervals and fed to a filter which determines the aperiodic portion of the signal and subtracts that aperiodic portion to output a residual data signal. The residual data signal is fed to a band pass filter which filters in a region determined by the predetermined frequency range of interest and which outputs to a calculation and display device wherein the variance of the rhythmic oscillation is calculated and displayed.
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Cohen Lee S.
Sykes Angela D.
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