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Tissue profile wellness monitor

  • US 9,848,807 B2
  • Filed: 01/16/2015
  • Issued: 12/26/2017
  • Est. Priority Date: 04/21/2007
  • Status: Active Grant
First Claim
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1. A patient monitor comprising:

  • a front-end interface configured to receive, from a sensor comprising a light source that emits light into a tissue site of a patient and a detector that detects a plurality of wavelengths of the emitted light after attenuation by the tissue site, a signal indicative of the detected light at each of the plurality of wavelengths; and

    a processor configured to;

    determine, at each of the plurality of wavelengths and based on the signal, normalized plethysmographs (NPs);

    normalize each of the determined NPs based on a reference wavelength;

    determine a tissue profile curve based on the normalized NPs at the plurality of wavelengths;

    analyze a shape of the tissue profile curve relative to a predefined boundary curve to determine patient wellness; and

    output an indication in response to determining the shape of the tissue profile curve exceeds the predefined boundary curve.

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