Patent ID: 8696591
Filing Date: 2014-04-15
Classification: A61B,A61M

Abstract:
1. A method of monitoring an analyte in a gas flow comprising the acts of: providing mainstream airway adapter having the gas flow therethrough; producing by a gas sensing portion a signal indicative of the analyte in the gas flow; determining by a processing portion an amount of the analyte in the gas flow based on the signal from the gas sensing portion; compensating by the processing portion for volumetric differences between the gas flow during inspiration and the gas flow during expiration; and outputting a signal indicative of the amount of analyte in a human perceivable format, wherein the compensating act includes monitoring a tracheal dead space gas and using the monitored tracheal dead space gas to determine a difference between an analyte fraction of inspired gas and an analyte fraction of the tracheal dead space gas for determining the amount of the analyte in the gas flow.