CPC A61B 5/097 (2013.01) [A61B 5/082 (2013.01); A61B 5/087 (2013.01); A61B 5/0823 (2013.01); A61B 5/0878 (2013.01); A61B 5/74 (2013.01); A61B 10/00 (2013.01); A61B 5/01 (2013.01); A61B 5/0803 (2013.01); A61B 5/0833 (2013.01); A61B 5/0836 (2013.01); A61B 5/0873 (2013.01); A61B 5/091 (2013.01); A61B 2010/0087 (2013.01); A61B 2562/0233 (2013.01)] | 17 Claims |
1. A handheld breath analysis device, comprising:
a breath input port having a mouthpiece that enables a user to exhale a breath sample into the breath analysis device;
an analyte sensor capable of measuring a concentration of an analyte in breath;
a valve fluidly coupled to the breath input port, the valve switchable between a first position in which breath exhaled into the breath input port is vented from the breath analysis device without exposure to the analyte sensor, and a second position in which breath exhaled into the breath input port is routed to the analyte sensor;
a pressure sensor configured to detect an initiation of exhalation into the breath input port; and
a controller configured to control the valve during exhalation to cause a first portion of the exhaled breath sample to be vented from the breath analysis device and to cause a second portion of the exhaled breath sample to be routed to the analyte sensor, the controller configured to control a timing with which the valve is switched from the first position to the second position based at least partly on (1) a measurement of an amount of time that has transpired since initiation of exhalation is detected using the pressure sensor, and (2) data regarding at least one characteristic of the user.
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