CO.sub.2 indicator and the use thereof to evaluate placement of

Details CO.sub.2 indicator and the use thereof to evaluate placement of CO.sub.2 indicator and the use thereof to evaluate placement of

1989-01-31

1991-04-09

Burr, Edgar S.

Surgery

Respiratory method or device

Respiratory gas supply means enters mouth or tracheotomy...

12820523, A61M 1600

Patent

active

050055720

ABSTRACT:
The invention relates to a CO.sub.2 detector for the detection of CO.sub.2 in respiratory gases. In particular, the invention relates to medical devices which contain a CO.sub.2 detector disposed within the devices to allow detection of CO.sub.2 within respiratory gases.
The invention also relates to a method for determining the proper placement of an intubation device comprising inserting a tracheal tube having a CO.sub.2 detector disposed within, and observing whether the CO.sub.2 detector changes color in response to the CO.sub.2 which is present in respiratory gases.
The CO.sub.2 detectors of the invention comprise a pH sensitive dye and a solid phase support. The CO.sub.2 detectors of the invention may further comprise a phase transport enhancer which allows the CO.sub.2 detector to respond contemporaneously with the presence or absence of CO.sub.2 in a respiratory gas on a breath by breath basis.

REFERENCES:
patent: 3068073 (1962-12-01), Stanford
patent: 3373735 (1968-03-01), Gallagher
patent: 3694164 (1972-09-01), Guenther
patent: 3754867 (1973-08-01), Guenther
patent: 4557900 (1985-12-01), Heitzmann
patent: 4691701 (1987-09-01), Williams
patent: 4728499 (1988-03-01), Fehder
patent: 4734125 (1988-03-01), Gehring et al.
Jeffrey A. B., et al., Anesthesiology, 60:613-614 (1984).

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