| abstract |
A non-invasive monitoring device for end-expiratory gas concentrations and methods of use thereof are described for the detection of endogenous gas concentrations, including respiratory gases in exhaled breath. An end-expiratory gas monitoring device for monitoring gas in mammalian exhalation, comprising: a gas conduit configured to be in fluid communication with mammalian exhalation; and a switching valve in fluid communication with said gas conduit, Communicating with a switching valve that controls the gas flow to the gas sensor downstream of the switching valve and a controller that determines the CO 2 level in the exhalation of the mammal and determines when the switching valve should direct the gas flow to the gas sensor to comprises a CO 2 sensor upstream of the switching valve, and a downstream of the recirculation loop of the switching valve for providing a continuous gas flow to the gas sensor, device. |