Closed loop control system with safety parameters and methods

  • US 10,173,007 B2
  • Filed: 02/13/2013
  • Issued: 01/08/2019
  • Est. Priority Date: 10/23/2007
  • Status: Active Grant
First Claim
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1. A method comprising:

  • monitoring, using one or more processors, a plurality of parameters associated with a physiological condition and an administration of a medication, including monitoring a sensor signal representative of a glucose level;

    detecting a potential hypoglycemic condition associated with the physiological condition;

    determining a severity level associated with the potential hypoglycemic condition, including determining a rate of change in glucose level based on previously received glucose levels stored in a memory in response to a detected communication failure from a transmitter of an analyte monitoring unit, and wherein the severity level is based at least in part on a retrieved preset safety level information;

    providing a hypoglycemic alert associated with the determined severity level if the sensor signal is determined to be within a dropout tolerance level;

    maintaining a medication delivery rate of the monitored administration of the medication, if the determined severity level does not exceed a preset safety level; and

    initiating a fixed pre-programmed medication delivery rate when the potential hypoglycemic condition is detected if the determined severity level exceeds the preset safety level, wherein the fixed pre-programmed medication delivery rate is within a previously determined safety level and different than the medication delivery rate of the monitored administration of the medication.

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