Breath analyte sensing apparatus that generates gas streams that flow over a nanoparticle-based sensor
AssigneeInvoy Holdings Inc.
InventorsLubna M. Ahmad, Rhett L. Martineau
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Abstract
An apparatus and associated method are provided for sensing an analyte, such as acetone, in breath. The apparatus includes a sorbent material that extracts the analyte from a dehumidified breath sample, and a nanoparticle-based sensor. The apparatus produces first and second gas streams that flow over the nanoparticle-based sensor. The first gas stream is used to generate a baseline signal, and the second gas stream is used to carry the extracted analyte from the sorbent material to the nanoparticle-based sensor. Various additional designs of analyte sensing devices are also disclosed.
Claims9
A device-implemented method performed by an analyte sensing device, the analyte sensing device comprising a sorbent material that extracts an analyte from a breath sample, the method comprising, under control of a processor:
- causing a first gas stream that does not first pass through the sorbent material to pass over a nanoparticle-based sensor, the first gas stream generated using a compressed gas source;
- recording a baseline signal generated by the nanoparticle-based sensor in response to the first gas stream;
- subsequently, causing a second gas stream to pass through the sorbent material and to thereafter flow over the nanoparticle-based sensor after the sorbent material has extracted the analyte from the breath sample;
- and
- recording a measurement signal generated by the nanoparticle-based sensor in response to the second gas stream, the measurement signal reflective of a concentration of the analyte in the second gas stream.
Dependencies are inferred from the claim text.