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US 5,375,592 AGranted
Carbon dioxide detector and shield
OwnerGilbert M. Kirk, James D. Bickleyinventors
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Abstract
An apparatus (14) for detecting carbon dioxide in exhaled gas is disclosed. The apparatus comprises an indicating element (10) for changing color when exposed to carbon dioxide and a carbon dioxide shield (12) for absorbing a predetermined level of carbon dioxide from the exhaled gas before exposing the indicating element (10) to the exhaled gas.
Claims10
Apparatus for detecting carbon dioxide in exhaled gas comprising:
- an indicating means for changing color in the presence of carbon dioxide;
- a carbon dioxide shield, associated with the indicating means, for absorbing up to a predetermined threshold concentration of carbon dioxide;
- and
- a housing for receiving the exhaled gas and for displaying the indicating element.
1 more element
A method for detecting carbon dioxide in gas exhaled by a patient comprising the steps of:
- shielding a carbon dioxide detector from the flow of exhaled gas with a carbon dioxide absorption element on a strip carrier;
- absorbing the carbon dioxide below predetermined threshold concentration;
- exposing the carbon dioxide detector to exhaled gas having the predetermined amount of carbon dioxide removed to effect a color change in the detector;
- and
- displaying the changed color of said carbon dioxide detector indicating the concentration of carbon dioxide in the exhaled gas.
2 more elements
Dependencies are inferred from the claim text.