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Blood glucose calibration system

  • US 9,445,759 B1
  • Filed: 12/24/2012
  • Issued: 09/20/2016
  • Est. Priority Date: 12/22/2011
  • Status: Active Grant
First Claim
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1. A blood glucose calibration system comprising:

  • a noninvasive optical sensor configured to illuminate optical radiation and output sensor signals responsive to attenuation of the optical radiation from pulsatile blood flow in a tissue site;

    a composite parameter generator responsive to the sensor signals so as to calculate a plurality of composite parameters corresponding to blood glucose;

    a glucose estimator that calculates a plurality of uncalibrated blood glucose estimates according to the plurality of composite parameters;

    a strip meter that reads test strips exposed to blood drawn from the person so as to generate a plurality of glucose calibrations; and

    a glucose calibrator that generates a plurality of calibrated blood glucose estimates from the plurality of uncalibrated blood glucose estimates according to the glucose calibrations,wherein the plurality of composite parameters comprise at least one of Gu/X and Gu*X, where “

    Gu”

    represents blood glucose and “

    X”

    represents a non-glucose blood parameter.

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