Hellige Gmbh

Gerhard H Hofmann

Hermann Taaks

A respiration monitor for use in an apnea monitor is disclosed in which a threshold value signal is automatically generated proportional to the average value of the monitored impedance of the subject during a base period selected by the operator. A comparator circuit operates to indicate respiration when the ratio between the threshold value signal and the impedance signal reaches a predetermined proportionality factor.

Apparatus for automatically monitoring body functions

An improves QRS detector is disclosed which utilizes a comparison between the arithmetic mean value of the filtered and full wave rectified EKG signal and such EKG signal reduced by a proportionality factor related to the ratio between the peak and mean value of a full wave rectified sinusoidal wave form. An adaptive threshold circuit is additionally disclosed which serves to increase the threshold value to the amplitude of detected QRS complexes.

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Freiburg im Breisgau, Germany

Gerhard H Hofmann