Apparatus for automatically monitoring body functions

Details Apparatus for automatically monitoring body functions Apparatus for automatically monitoring body functions

1981-04-17

1983-09-06

Groody, James J.

Communications: electrical

Condition responsive indicating system

Specific condition

128723, 324 65R, 328148, 340657, G08B 2300, A61B 504

Patent

active

044032153

ABSTRACT:
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.

REFERENCES:
patent: 3545429 (1970-12-01), Pelta et al.
patent: 3547106 (1970-12-01), Bornmann
patent: 3677261 (1972-07-01), Day
patent: 3727606 (1973-04-01), Sielaff
patent: 3802417 (1974-04-01), Lang
patent: 3835840 (1974-09-01), Mount
patent: 3875929 (1975-04-01), Grant
patent: 3926177 (1975-12-01), Hardway et al.
patent: 3996925 (1976-12-01), Djordjevich
patent: 4036217 (1977-07-01), Ito et al.
patent: 4116231 (1978-09-01), Matsuo
"Simple Impedance Pneumograph", Medical and Biological Engineering, Barker et al., May, 1973, pp. 352-353.

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