Patent ID: 6308098
Filing Date: 2001-10-23
Classification: A61N

Abstract:
A process for detecting physical positions or changes of position of a human being, comprising:detecting a plurality of physiological signals dependent on a sympathetic/parasympathetic nerve system in a heart of a human being or in a vessel near the heart of the human being by a sensor at pre-specified times, each of said pre-specified times corresponding to a physiological or a stimulation event;deriving and storing a plurality of values as signal parameters from the plurality of physiological signals according to a pre-specified signal processing rule;determining a fluctuation curve of the stored signal parameter values;performing a frequency analysis of the fluctuation curve to obtain a spectral power density;evaluating the spectral power density based on a predefined algorithm;issuing a position signal as a function of the evaluation of the spectral power density;wherein detecting includes detection of a morphology for each of the plurality of physiological signals and wherein deriving includes derivation of the values as signal parameters in each case from the morphology of an individually detected signal.