Carbon dioxide indicator

Details Carbon dioxide indicator Carbon dioxide indicator

G - Physics

01

N

150/21

G01N 33/84 (2006.01) G01N 33/52 (2006.01)

Patent

CA 1325763

ABSTRACT OF THE DISCLOSURE A carbon dioxide indicator for use in determining the proper placement of endotracheal tubes. The indicator is comprised of a pH-sensitive dye suspended in a predominantly hydrophilic polymer matrix. The indicator may be placed inside a tube or connector to form an indicator device. When the pH-sensitive dye changes color due to CO2 and moisture in exhaled air, the color change is visible from outside the device.

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