Methods, Devices, Systems and Compositions for Detecting Gases
1 Assignment
0 Petitions
Accused Products
Abstract
A method of monitoring a respiratory stream can be provided by monitoring color change of a color change material to determine a CO2 level of the respiratory stream in contact with the color change material by emitting visible light onto the color change material. Related devices, systems, and compositions are also disclosed.
34 Citations
39 Claims
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1-15. -15. (canceled)
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16. A device comprising:
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a visible light emitter circuit configured to provide emitted visible light into a breathing circuit; a first visible light sensor circuit configured to receive a first portion of the emitted visible light; and a processor circuit, coupled to the visible light emitter circuit and to the first visible light sensor circuit, the processor circuit configured to determine a CO2 level of a respiratory stream in the breathing circuit based on the first portion of the emitted visible light. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A device comprising:
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a visible light emitter circuit configured to provide emitted visible light into a respiratory stream; a first visible light sensor circuit configured to receive a first portion of the emitted visible light; and a processor circuit, coupled to the visible light emitter circuit and to the first visible light sensor circuit, the processor circuit configured to determine a CO2 level in the respiratory stream based on the first portion of the emitted visible light. - View Dependent Claims (30, 31, 32)
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33. A composition for use in monitoring a respiratory stream comprising:
a color change material configured to change from a first color to a second color in response to an increase in CO2 within the respiratory stream, where the first color includes more of a first component than a second component or more than a third component and the second color includes less of the first component than the second component or less than the third component.
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34. A method of determining a CO2 level of a respiratory stream, the method comprising:
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electronically emitting visible light into the respiratory stream to provide emitted visible light onto at least a portion of a color change material in contact with the respiratory stream; electronically sensing a first color generated by a reactive portion of color change material responsive to the emitted visible light; and determining the CO2 level of the respiratory stream based on the first color. - View Dependent Claims (35, 36, 37, 38, 39)
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Specification