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Advanced analyte sensor calibration and error detection

  • US 9,848,809 B2
  • Filed: 04/13/2012
  • Issued: 12/26/2017
  • Est. Priority Date: 04/15/2011
  • Status: Active Grant
First Claim
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1. A method for determining a sensitivity of a continuous analyte sensor, the method comprising:

  • applying a bias voltage to an analyte sensor;

    applying a voltage step above the bias voltage to the analyte sensor;

    measuring, using sensor electronics, a signal response of the voltage step from the analyte sensor;

    determining, using the sensor electronics, a peak current of the signal response;

    determining, using the sensor electronics, a sensitivity of the analyte sensor by correlating the peak current to a predetermined relationship of the peak current to sensor sensitivity, wherein the predetermined relationship is based at least in part on time of use of the analyte sensor;

    receiving, using the sensor electronics, from the analyte sensor sensor data indicative of analyte concentration;

    compensating, using the sensor electronics, the sensor data using the determined sensitivity of the analyte sensor;

    determining, using the sensor electronics, an analyte concentration value based at least in part on the compensated sensor data; and

    displaying, using a display, the determined analyte concentration value.

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