Patent ID: 9518991
Filing Date: 2016-12-13
CPC Classification: A61B,G01N,Y10T

Claim Text:
1. A method for sensing acetone in breath using a breath analysis device, the method comprising: providing a breath analysis device having a reactant in a reaction zone, wherein the reactant comprises a primary amine disposed on a surface, and wherein the reaction zone has an optical characteristic that is at a reference level; a liquid nitroprusside solution disposed within the breath analysis device separately from the reactant; using the breath analysis device to cause the breath to contact the reactant in the reaction zone so that the acetone in the breath reacts with the reactant to form a reaction product; after the reaction product has been formed, using the breath analysis device to cause the nitroprusside solution to contact and react with the reaction product and to facilitate a change in the optical characteristic of the reaction zone relative to the reference level; and using the breath analysis device to detect the change in the optical characteristic to sense the acetone in the breath.