Carbon dioxide indicator

Details Carbon dioxide indicator Carbon dioxide indicator

1990-01-29

1992-06-23

Johnston, Jill A.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Calorimeter

422 57, 422 58, 436 68, 436133, 436163, 436169, 128719, 12820714, G01N 2164

Patent

active

051241293

ABSTRACT:
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 CO.sub.2 and moisture in exhaled air, the color change is visible from outside the device.

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