Airway adapter and gas analyzer for measuring oxygen concentration of a respiratory gas
First Claim
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1. A mainstream sensor comprising:
- an airway adapter comprising a flow channel configured to carry a respiratory gas; and
a gas analyzer configured to measure oxygen concentration of the respiratory gas, the gas analyzer comprising a vortex flow meter, the vortex flow meter comprising a bluff body and a vortex flow meter detector assembly configured to measure a signal indicative of vortices formed downstream of the bluff body,wherein the bluff body comprises a surface at least partially coated with a luminophore that is excited by received radiation, wherein the luminophore emits luminescent radiation indicative of oxygen concentration of the respiratory gas when the luminophore is in contact with the respiratory gas, andwherein the bluff body further comprises a transparent radiation path surrounded by the surface, the bluff body being configured to guide at least one of the received radiation and the luminescent radiation emitted by the luminophore.
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Abstract
An airway adapter comprising a flow channel configured to carry a respiratory gas, and a body comprising a surface at least partially coated with a luminophore that is excited by received radiation, wherein the luminophore emits luminescent radiation indicative of oxygen concentration of the respiratory gas when the luminophore is in contact with the respiratory gas, wherein the body comprises a transparent radiation path surrounded by the surface, the body being configured to guide at least one of the received radiation and the luminescent radiation emitted by the luminophore.
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Citations
18 Claims
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1. A mainstream sensor comprising:
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an airway adapter comprising a flow channel configured to carry a respiratory gas; and a gas analyzer configured to measure oxygen concentration of the respiratory gas, the gas analyzer comprising a vortex flow meter, the vortex flow meter comprising a bluff body and a vortex flow meter detector assembly configured to measure a signal indicative of vortices formed downstream of the bluff body, wherein the bluff body comprises a surface at least partially coated with a luminophore that is excited by received radiation, wherein the luminophore emits luminescent radiation indicative of oxygen concentration of the respiratory gas when the luminophore is in contact with the respiratory gas, and wherein the bluff body further comprises a transparent radiation path surrounded by the surface, the bluff body being configured to guide at least one of the received radiation and the luminescent radiation emitted by the luminophore. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A gas analyzer for measuring oxygen concentration of a respiratory gas, the gas analyzer comprising:
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an emitter configured to emit radiation; and a vortex flow meter, the vortex flow meter comprising a bluff body and a vortex flow meter detector assembly configured to measure a signal indicative of vortices formed downstream of the bluff body, wherein the bluff body comprises a surface at least partially coated with a luminophore, that is excited by the radiation emitted by the emitter, and wherein the luminophore emits luminescent radiation indicative of oxygen concentration of the respiratory gas when the luminophore is in contact with the respiratory gas; a filter configured to transmit the luminescent radiation emitted by the luminophore; and a detector configured to receive the luminescent radiation transmitted by the filter, wherein the bluff body further comprises a transparent radiation path surrounded by the surface, the bluff body being configured to guide at least one of the radiation emitted by the emitter and the luminescent radiation emitted by the luminophore. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification