Audio-capnometry apparatus

Details Audio-capnometry apparatus Audio-capnometry apparatus

1991-07-10

1992-03-17

Burr, Edgar S.

Surgery

Respiratory method or device

Means placed in body opening to facilitate insertion of...

12820523, 12820714, A61M 1600

Patent

active

050958968

ABSTRACT:
An apparatus for use in audio monitoring of carbon dioxide concentration in general, and as an aid in blind nasal intubation, as well as other procedures requiring the monitoring of carbon dioxide in which carbon dioxide is measured by a carbon dioxide monitor, the carbon dioxide monitors output is used as the control voltage of a voltage controlled oscillator, and the output of the voltage controlled oscillator is amplified, delivered to a speaker, and thereby produces an audible tone whose pitch is directly proportional to the level of carbon dioxide being monitored.

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patent: 4416289 (1983-11-01), Bresler
patent: 4431005 (1984-02-01), McCormick
patent: 4445501 (1984-05-01), Bresler
patent: 4485822 (1984-12-01), O'Connor et al.
patent: 4537190 (1985-08-01), Caillot et al.
patent: 4648396 (1987-03-01), Raemer
patent: 4738266 (1988-04-01), Thatcher

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