Regulating entry into a closed-loop operating mode of an insulin infusion system
First Claim
1. An electronic device comprising:
- a processor architecture comprising at least one processor device; and
at least one memory element associated with the processor architecture, the at least one memory element storing processor-executable instructions that, when executed by the processor architecture, cause the processor architecture to;
obtain sensor calibration data for a continuous glucose sensor that generates a sensor variable indicative of blood glucose of the user;
identify a most recent calibration factor from the sensor calibration data, the most recent calibration factor representing a first conversion value applicable to convert a first value of the sensor variable to a first blood glucose value;
identify a prior calibration factor from the sensor calibration data, the prior calibration factor representing a second conversion value applicable to convert a second value of the sensor variable to a second blood glucose value, and the prior calibration factor corresponding to an earlier time relative to the most recent calibration factor; and
permit entry into a closed-loop operating mode of an insulin infusion device for a user based on the most recent calibration factor and the prior calibration factor only when t−
tRecent≦
tR≦
t, wherein;
t is a time when attempting to enter the closed-loop operating mode;
tRecent is a predetermined time period;
tR is a time when the most recent calibration factor was obtained; and
the insulin infusion device operation in the closed-loop operating mode to deliver insulin to a body of the user is influenced by the most recent calibration factor.
1 Assignment
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Accused Products
Abstract
An electronic controller for an insulin infusion device includes at least one processor device and at least one memory element that cooperate to provide a processor-implemented closed-loop initiation module. The initiation module is operated to obtain a most recent calibration factor for a continuous glucose sensor, the most recent calibration factor representing a first conversion value applicable to convert a first sensor value to a first blood glucose value. The initiation module also obtains a prior calibration factor for the sensor, and calibration timestamp data for the most recent calibration factor and the prior calibration factor. The initiation module regulates entry into a closed-loop operating mode of the insulin infusion device, based on the most recent calibration factor, the prior calibration factor, and the calibration timestamp data.
264 Citations
29 Claims
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1. An electronic device comprising:
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a processor architecture comprising at least one processor device; and at least one memory element associated with the processor architecture, the at least one memory element storing processor-executable instructions that, when executed by the processor architecture, cause the processor architecture to; obtain sensor calibration data for a continuous glucose sensor that generates a sensor variable indicative of blood glucose of the user; identify a most recent calibration factor from the sensor calibration data, the most recent calibration factor representing a first conversion value applicable to convert a first value of the sensor variable to a first blood glucose value; identify a prior calibration factor from the sensor calibration data, the prior calibration factor representing a second conversion value applicable to convert a second value of the sensor variable to a second blood glucose value, and the prior calibration factor corresponding to an earlier time relative to the most recent calibration factor; and permit entry into a closed-loop operating mode of an insulin infusion device for a user based on the most recent calibration factor and the prior calibration factor only when t−
tRecent≦
tR≦
t, wherein;t is a time when attempting to enter the closed-loop operating mode; tRecent is a predetermined time period; tR is a time when the most recent calibration factor was obtained; and the insulin infusion device operation in the closed-loop operating mode to deliver insulin to a body of the user is influenced by the most recent calibration factor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An electronic device comprising:
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a processor architecture comprising at least one processor device; and at least one memory element associated with the processor architecture, the at least one memory element storing processor-executable instructions that, when executed by the processor architecture, cause the processor architecture to; obtain sensor calibration data for a continuous glucose sensor that generates a sensor variable indicative of blood glucose of the user; identify a most recent calibration factor from the sensor calibration data, the most recent calibration factor representing a first conversion value applicable to convert a first value of the sensor variable to a first blood glucose value; identify a prior calibration factor from the sensor calibration data, the prior calibration factor representing a second conversion value applicable to convert a second value of the sensor variable to a second blood glucose value, and the prior calibration factor corresponding to an earlier time relative to the most recent calibration factor; and permit entry into a closed-loop operating mode of an insulin infusion device for a user based on the most recent calibration factor and the prior calibration factor only when CFmin≦
CFR≦
CFmax, wherein;CFmin is a minimum acceptable calibration factor value; CFmax is a maximum acceptable calibration factor value; CFR is the most recent calibration factor; and the insulin infusion device operation in the closed-loop operating mode to deliver insulin to a body of the user is influenced by the most recent calibration factor.
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15. An electronic device comprising:
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a processor architecture comprising at least one processor device; and at least one memory element associated with the processor architecture, the at least one memory element storing processor-executable instructions that, when executed by the processor architecture, cause the processor architecture to; obtain sensor calibration data for a continuous glucose sensor that generates a sensor variable indicative of blood glucose of the user; identify a most recent calibration factor from the sensor calibration data, the most recent calibration factor representing a first conversion value applicable to convert a first value of the sensor variable to a first blood glucose value; identify a prior calibration factor from the sensor calibration data, the prior calibration factor representing a second conversion value applicable to convert a second value of the sensor variable to a second blood glucose value, and the prior calibration factor corresponding to an earlier time relative to the most recent calibration factor; and permit entry into a closed-loop operating mode of an insulin infusion device for a user based on the most recent calibration factor and the prior calibration factor only when CFmin≦
CFP≦
CFmax, wherein;CFmin is a minimum acceptable calibration factor value; CFmax is a maximum acceptable calibration factor value; CFP is the prior calibration factor; and the insulin infusion device operation in the closed-loop operating mode to deliver insulin to a body of the user is influenced by the most recent calibration factor.
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16. An electronic device comprising:
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a processor architecture comprising at least one processor device; and at least one memory element associated with the processor architecture, the at least one memory element storing processor-executable instructions that, when executed by the processor architecture, cause the processor architecture to; obtain sensor calibration data for a continuous glucose sensor that generates a sensor variable indicative of blood glucose of the user; identify a most recent calibration factor from the sensor calibration data, the most recent calibration factor representing a first conversion value applicable to convert a first value of the sensor variable to a first blood glucose value; identify a prior calibration factor from the sensor calibration data, the prior calibration factor representing a second conversion value applicable to convert a second value of the sensor variable to a second blood glucose value, and the prior calibration factor corresponding to an earlier time relative to the most recent calibration factor; and permit entry into a closed-loop operating mode of an insulin infusion device for a user based on the most recent calibration factor and the prior calibration factor only when tR−
tDiffmax≦
tP≦
tR−
tDiffmin, wherein;tR is a time when the most recent calibration factor was obtained; tDiffmax is a maximum allowable time difference; tDiffmin is a minimum allowable time difference; tP is a time when the prior calibration factor was obtained; and the insulin infusion device operation in the closed-loop operating mode to deliver insulin to a body of the user is influenced by the most recent calibration factor.
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17. A non-transitory computer readable medium containing processor-executable instructions stored therein that, when executed by a processor architecture comprising at least one processor device, cause the processor architecture to:
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obtain sensor calibration data for a continuous glucose sensor that generates a sensor variable indicative of blood glucose of the user; identify a most recent calibration factor from the sensor calibration data, the most recent calibration factor representing a first conversion value applicable to convert a first value of the sensor variable to a first blood glucose value; identify a prior calibration factor from the sensor calibration data, the prior calibration factor representing a second conversion value applicable to convert a second value of the sensor variable to a second blood glucose value, and the prior calibration factor corresponding to an earlier time relative to the most recent calibration factor; and permit entry into a closed-loop operating mode of the insulin infusion device, based on the most recent calibration factor and the prior calibration factor only when t−
tRecent≦
tR≦
t, wherein;t is a time when attempting to enter the closed-loop operating mode; tRecent is a predetermined time period; tR is a time when the most recent calibration factor was obtained; and the insulin infusion device operation in the closed-loop operating mode to deliver insulin to a body of the user is influenced by the most recent calibration factor. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. An electronic controller for an insulin infusion device, the electronic controller comprising:
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a processor architecture comprising at least one processor device; and at least one memory element associated with the processor architecture, the at least one memory element storing processor-executable instructions that, when executed by the processor architecture, provide a closed-loop initiation module configured to; obtain a most recent calibration factor for a continuous glucose sensor that generates a sensor variable indicative of blood glucose of a user, the most recent calibration factor representing a first conversion value applicable to convert a first value of the sensor variable to a first blood glucose value; obtain a prior calibration factor for the continuous glucose sensor, the prior calibration factor representing a second conversion value applicable to convert a second value of the sensor variable to a second blood glucose value; obtain calibration timestamp data for the most recent calibration factor and the prior calibration factor; and permit entry into a closed-loop operating mode of the insulin infusion device, based on the most recent calibration factor, the prior calibration factor, and the calibration timestamp data only when t−
tRecent≦
tR≦
t, wherein;t is a time when attempting to enter the closed-loop operating mode; tRecent is a predetermined time period; tR is a time when the most recent calibration factor was obtained; and the insulin infusion device operation in the closed-loop operating mode to deliver insulin to a body of the user is influenced by the most recent calibration factor. - View Dependent Claims (26, 27, 28, 29)
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Specification