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Non-invasive, miniature, breath monitoring apparatus

  • US 6,599,253 B1
  • Filed: 06/25/2001
  • Issued: 07/29/2003
  • Est. Priority Date: 06/25/2001
  • Status: Expired due to Term
First Claim
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1. A method of monitoring a subject'"'"'s breath for diagnostic analysis comprising;

  • delivering a sample gas mixture to a subject;

    collecting a low volume breath sample from said subject;

    delivering said low volume breath sample from said subject to a miniature sample cell;

    projecting one or more collimated beams of radiation through said miniature sample cell;

    isolating a narrow spectral region corresponding to at least two selected frequency components centered at different wavelengths;

    analyzing said selected frequency components of said collimated beam with one or more spectrometers;

    storing each output from said one or more spectrometers;

    converting said outputs from each spectrometer to concentration readings;

    whereby said outputs can be processed to produce diagnostic information.

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