A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
326/13, 354/22
A61B 5/02 (2006.01) A61B 5/024 (2006.01) A61B 5/04 (2006.01) H03H 17/02 (2006.01)
Patent
CA 1203904
Method and Apparatus For Evaluating Rhythmic Oscillations in Aperiodic Physiological Response Systems 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 read out 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.
444453
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Porges Stephen W.
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