END-TIDAL GAS MONITORING APPARATUS
First Claim
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1. An end-tidal gas monitoring apparatus for monitoring gas in the exhaled breath of a mammal comprising:
- a gas conduit configured for fluid communication with the exhaled breath of a mammal;
a diverter valve in fluid communication with the gas conduit, wherein the diverter valve controls gas flow to a gas sensor downstream of the diverter valve;
a CO2 sensor upstream of the diverter valve in communication with a controller which determines CO2 levels in the exhaled breath of a mammal to determine when the diverter valve should direct gas flow to the gas sensor; and
a recirculation loop downstream of the diverter valve to provide a continuous gas flow to the gas sensor.
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Abstract
A non-invasive monitoring apparatus for end-tidal gas concentrations, and a method of use thereof, is described for the detection of endogenous gas concentrations, including respiratory gases, in exhaled breath.
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Citations
19 Claims
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1. An end-tidal gas monitoring apparatus for monitoring gas in the exhaled breath of a mammal comprising:
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a gas conduit configured for fluid communication with the exhaled breath of a mammal; a diverter valve in fluid communication with the gas conduit, wherein the diverter valve controls gas flow to a gas sensor downstream of the diverter valve; a CO2 sensor upstream of the diverter valve in communication with a controller which determines CO2 levels in the exhaled breath of a mammal to determine when the diverter valve should direct gas flow to the gas sensor; and a recirculation loop downstream of the diverter valve to provide a continuous gas flow to the gas sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An end-tidal gas monitoring apparatus for monitoring hydrogen sulfide gas in the exhaled breath of a mammal comprising:
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a gas conduit configured for fluid communication with the exhaled breath of a mammal; a diverter valve in fluid communication with the gas conduit, wherein the diverter valve controls exhaled breath flow to a hydrogen sulfide gas sensor downstream of the diverter valve; a CO2 sensor upstream of the diverter valve to denote the beginning and end of exhalation cycle in communication with a controller which determines end-tidal gas levels in the exhaled breath of a mammal to determine when the diverter valve should direct end-tidal gas flow to the gas sensor; and a recirculation loop downstream of the diverter valve to provide a continuous gas flow of end-tidal gas to the hydrogen sulfide gas sensor; and the hydrogen sulfide gas sensors being located in the recirculation loop.
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9. A method for monitoring a gas in exhaled breath of a mammal comprising:
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collecting exhaled breath from a mammal; determining a predetermined level of end tidal CO2 in the exhaled breath; directing gas flow to a gas sensor upon detection of the predetermined level of end tidal CO2; optionally recirculating the exhaled gas to provide a continuous gas flow to the gas sensor; and determining a level of the exhaled gas in the exhaled breath. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for monitoring a gas in exhaled breath of a mammal comprising:
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administering a therapeutic dose of a sulfide containing compound to the mammal to increase blood levels of sulfide; collecting exhaled breath from a mammal; determining a level of the exhaled gas in the exhaled breath; and comparing the level of the exhaled gas in the exhaled breath to a predetermined acceptable range of exhaled gas. - View Dependent Claims (19)
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Specification