Breath gas analysis systems and methods
AssigneeVyaire Medical, Inc.
InventorJuergen Reinstaedtler
Life of this patent
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Abstract
Devices and methods are provided for breath gas analysis when determining the difference in the concentrations of at least one gas in the exhaled breathing air on the one hand and in the ambient air on the other hand. The device may include at least one gas sensor, by means of which the concentration of a gas can be determined, and a line system, through whose lines the exhaled air to be examined, the ambient air and a calibrating gas can be selectively pumped to the gas sensor. The method may include feeding ambient air; feeding calibrating gas to the gas sensor; feeding exhaled air to the gas sensor; feeding calibrating gas to the gas sensor again; and feeding exhaled air to the gas sensor again.
Claims20
A device for breath gas analysis, the device comprising:
- a first intake, external to the device, for receiving exhaled air from a subject and for receiving ambient air;
- a first line path for the exhaled air and the ambient air, the first line path extending from the first intake into the device;
- at least one gas sensor disposed within the device along the first line path;
- a second intake, external to the device, for receiving a calibration gas;
- and
- a second line path extending from the second intake into the device, through a valve disposed within the device, to a portion of the first line path disposed within the device, the valve configured to selectively provide the calibration gas to displace ambient air along the first line path.
Dependencies are inferred from the claim text.