Patent ID: 9689864
Date: 2017-06-27
CPC Classifications: A61B,G01N

Claim:
1. A method of determining the concentration of an analyte of interest in breath, comprising the steps of: obtaining a disposable cartridge comprising a reaction chamber, and a window to permit determination of a color intensity in the reaction chamber, the reaction chamber comprising a dry reagent; directing a volume of breath into the cartridge such that the volume of breath comes into contact with the dry reagent; subsequently, initiating a sequence, under control of a processor, whereby liquid is released from a liquid container into the reaction chamber to cause a reaction which produces a change in the intensity of a color viewable through the window, the intensity of the color corresponding to the concentration of the analyte of interest, the reaction progressing through a kinetic phase and eventually reaching equilibrium; wherein the sequence additionally comprises the step of measuring the intensity of the color at a point in the kinetic phase, to determine the concentration of the analyte of interest in breath.