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Glucose sensor signal reliability analysis

  • US 10,251,588 B2
  • Filed: 04/14/2015
  • Issued: 04/09/2019
  • Est. Priority Date: 10/28/2010
  • Status: Active Grant
First Claim
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1. A method comprising:

  • obtaining a plurality of glucose sensor measurements at a glucose sensor over a time interval by receiving an electrical current generated by the glucose sensor during a time that the glucose sensor is in contact with a patient;

    storing the plurality of glucose sensor measurements as sensor data in a memory; and

    detecting a decrease in an ability of the glucose sensor to accurately reflect a glucose level in a fluid of the patient based, at least in part, on an application of one or more thresholds to one or more sensitivity metrics, at least one of said sensitivity metrics being based, at least in part, on said glucose sensor measurements,wherein at least one of the sensitivity metrics comprises a measurement of dispersion of a rate of change in the glucose sensor measurements over at least a portion of the time interval,wherein a value of the measurement of dispersion that reflects a greater degree of dispersion corresponds to a greater ability of the glucose sensor to accurately reflect the glucose level, and a value of the measurement of dispersion that reflects a smaller degree of dispersion corresponds to a lesser ability of the glucose sensor to accurately reflect the glucose level, andwherein the detecting the decrease in the ability of the glucose sensor, the application of the one or more thresholds to the one or more sensitivity metrics, and the measurement of dispersion of the rate of change in the glucose sensor measurements are performed by one or more processors.

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