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US 10,499,819 B2Granted
Breath selection for analysis
AssigneeCapnia, Inc.
InventorsAnthony D. Wondka, Anish Bhatnagar, Scott J. Gilbert
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Abstract
Methods and systems are described to obtain and analyze a gas sample from a desired section of the breath of a person, while accounting for erratic, episodic or otherwise challenging breathing patterns that may otherwise make the capturing of a gas sample from the desired section of breath difficult. These techniques may provide more reliable, accurate and adequate samples of gas such as end-tidal gas, and ultimately an accurate analysis of the sample captured.
Claims12
An apparatus for analyzing an exhaled breath, comprising:
- a sensor;
- a breath sampling system;
- a gas analyzer;
- and
- a control system comprising a processor that operates the sensor, the breath sampling system, and the gas analyzer using a plurality of algorithms,
- wherein the sensor measures a first parameter of a first exhaled breath to determine a threshold criteria according to a first algorithm run by the processor, the sensor also measuring a second parameter of a next exhaled breath,
- wherein the breath sampling system captures the next exhaled breath according to a second algorithm run by the processor when the second parameter meets the threshold criteria, or initiates capture of an alternative breath according to a third algorithm when the threshold criteria are not met, and
- wherein the gas analyzer
- applies a gas sampling and analysis algorithm to the captured next exhaled breath, and applies a correction factor to the gas sampling and analysis algorithm for the captured alternative breath.
6 more elements
Dependencies are inferred from the claim text.