Carbon dioxide detection (II)

Details Carbon dioxide detection (II) Carbon dioxide detection (II)

1992-07-23

1994-03-08

Burr, Edgar S.

Surgery

Respiratory method or device

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

12820523, 12820714, A61M 1600

Patent

active

052918793

ABSTRACT:
Methods and apparatus for ascertaining whether there is at least a threshold concentration of carbon dioxide in gases being monitored. Reversible hydration of the carbon dioxide to generate excess hydrogen ions and trigger a color change in a pH sensitive indicator is employed in representative embodiments of the invention to provide an indication that the threshold concentration of carbon dioxide is present in the gases. The methods and apparatus may be used to distinguish between tracheal and esophageal intubation of human and other mammalian patients.

REFERENCES:
patent: 4790327 (1988-12-01), Despotis
patent: 4928687 (1990-05-01), Lampotang et al.

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