Carbon dioxide monitor
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United States of America Patent
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Dec 5, 1995
Grant Date -
N/A
app pub date -
May 29, 1992
filing date -
Sep 29, 1989
priority date (Note) -
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Abstract
The monitor which provides a detectable indication of the presence of an elevated proportion of carbon dioxide compared to that in normal ambient air, comprises a substrate coated by an intimate mixture of a transparent plasticised polymer vehicle, and an indicator material which undergoes a colour change on exposure to carbon dioxide. The indicator material comprises a salt of an indicator anion and a lipophilic organic quaternary cation. The device can be used to provide an indication of correct intubation of the trachea of a patient.
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