Activity and respiration monitor

Details Activity and respiration monitor Activity and respiration monitor

1975-07-21

1977-07-05

Kamm, William E.

Surgery

Truss

Perineal

324 61R, A61B 510

Patent

active

040333329

ABSTRACT:
A contactless activity and respiration monitor is described which includes a resilient, capacitive pad, which may be a mattress, or a pad used with a mattress, having a capacitor therein responsive to the activity or respiration of a body lying on it. Electronic capacitance sensing circuitry is disclosed which provides an indication or alarm in the event of excessive activity or apnea, or low or high respiration rate. Readouts of respiration rate, and number of events of activity may also be provided. Circuits are disclosed for filtering out large static or relatively long term changes in the capacitance of the capacitive pad while maintaining the high sensitivity necessary to sense movements caused by respiration.

REFERENCES:
patent: 2755796 (1956-07-01), Boucke
patent: 2907320 (1959-10-01), DeWeese et al.
patent: 3316902 (1967-05-01), Winchel et al.
patent: 3324848 (1967-06-01), Domeier et al.
patent: 3452743 (1969-07-01), Rieke
patent: 3611174 (1971-10-01), Day
patent: 3760794 (1973-09-01), Bashem
patent: 3796208 (1974-03-01), Bloice

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