CO.sub.2 indicator and the use thereof to evaluate placement of tracheal tubes
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United States of America Patent
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Apr 9, 1991
Issued Date -
N/A
app pub date -
Jan 31, 1989
filing date -
Feb 26, 1988
priority date (Note) -
Expired
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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.
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