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Breath end-tidal gas monitor

  • US 9,936,897 B2
  • Filed: 07/29/2015
  • Issued: 04/10/2018
  • Est. Priority Date: 06/19/2003
  • Status: Active Grant
First Claim
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1. A breath gas analyzer system including:

  • an air inlet configured to receive aspirated air from the respiratory system of a subject;

    a capnograph coupled to said air inlet, said capnograph adapted to identify a transition point between an exhalation and an inhalation of air in the respiratory system;

    a plurality of flow selector valves;

    a sample volume coupled to said capnograph, said sample volume configured to selectively isolate a sample of aspirated air using the plurality of flow selector valves, said plurality of flow selector valves configured to selectively control a flow of air between said air inlet, said capnograph, said sample volume, and said at least one gas analyzer; and

    at least one gas analyzer coupled to and downstream from, at least one of the plurality of flow selector valves, and configured to receive a sample of aspirated air from said sample volume; and

    wherein said at least one gas analyzer is further configured to measure at least one gas concentration in said sample of aspirated air.

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