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Probability based controller gain

  • US 10,478,556 B2
  • Filed: 03/04/2016
  • Issued: 11/19/2019
  • Est. Priority Date: 03/04/2016
  • Status: Active Grant
First Claim
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1. A method for estimating glucose level of a person having diabetes and selecting automatically open-loop and closed-loop control for a connected therapy delivery device, the method comprising:

  • receiving into a blood glucose management device having a microcontroller a plurality of measured glucose results and corresponding impedance values from a glucose sensor coupled to the person;

    using the microcontroller to analyze the plurality of measured glucose results and corresponding impedance values with a probability analysis tool configured to determine a total quality score Qtotal that is based on the minimum constraint of a set of quality metrics which comprises a probability of glucose sensor accuracy PA based on the plurality of measured glucose results and a probability of sensing quality Qac based on the impedance values;

    using the microcontroller to estimate the glucose level of the person with a recursive filter configured to estimate the glucose level based on the plurality of measured glucose results weighted with the total quality score Qtotal; and

    switching, via the microcontroller, the connected therapy delivery device automatically between open-loop control and closed-loop control based on the value of the total quality score Qtotal .

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