Simple capsule pneumograph

Details Simple capsule pneumograph Simple capsule pneumograph

1986-05-02

1988-03-22

Coven, Edward M.

Surgery

Truss

Pad

A61B 508

Patent

active

047321598

ABSTRACT:
A capsule pneumograph includes an electret microphone connected to a capsule chestpiece attached to a sleeping subject. The output of the microphone is connected to the input of a recorder or monitor in order to provide a system for the detection of respiratory movements in subjects during polysomnographic sleep monitoring. A tube connecting the capsule chestpiece to the microphone functions as a low pass filter to pass only low frequency signals in the range of respiratory movements from the chestpiece to the microphone.

REFERENCES:
patent: 2699465 (1955-01-01), Hamilton
patent: 3658052 (1972-04-01), Alter
patent: 3727606 (1973-04-01), Sielaff
patent: 3782368 (1974-01-01), Reibold
patent: 3831586 (1974-08-01), Petit
patent: 4169462 (1979-10-01), Strube
patent: 4245651 (1981-01-01), Frost
patent: 4534058 (1985-08-01), Hower
patent: 4598417 (1986-07-01), Deno
"Long Term Respiration Monitoring in Infants--A Comparison of Impedance and Pressure Capsule Monitors" by R. Railton et al., Clin. Phys. Physiol. Meas., 1983, 4(1); 91-94.

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