Predicted time to assess and/or control a glycemic state
First Claim
1. An apparatus comprising:
- an insulin infusion pump to deliver insulin to a patient;
a glucose sensor to obtain observations of blood glucose concentration of the patient; and
a controller to;
assign a plurality of different threshold time periods to each of a plurality of different target blood glucose concentration levels for the patient, resulting in a plurality of different time-to-target checkpoints for the target blood glucose concentration levels, each of the plurality of different time-to-target checkpoints having a respective insulin infusion pump operation associated therewith;
predict a respective duration of time for the patient'"'"'s blood glucose concentration to reach each of the target blood glucose concentration levels using an observed current blood glucose concentration of the patient;
identify which of the target blood glucose concentration levels is predicted to be reached first in time;
compare the predicted duration of time for the identified target blood glucose concentration level against the threshold time periods of the plurality of different time-to-target checkpoints of the identified target blood glucose concentration level, to determine an operation of the insulin infusion pump based on the predicted duration of time and the plurality of different time-to-target checkpoints; and
altering a therapy applied to the patient based on the determined operation of the insulin infusion pump.
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Abstract
Presented here are techniques for controlling glucose levels of a patient based on predicted time to a target glucose level. One methodology predicts a trajectory of the blood glucose level based on past observations of the blood glucose level, determines a cost expression based on the trajectory, and affects a future command to an infusion pump to affect a cost value according to the cost expression. Another methodology defines a target blood glucose concentration level for the patient, observes a current blood glucose concentration for the patient based on signals received from a blood-glucose sensor, and predicts a duration of time for the patient'"'"'s blood glucose concentration to reach the target blood glucose concentration level based on the observed current blood glucose concentration.
92 Citations
13 Claims
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1. An apparatus comprising:
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an insulin infusion pump to deliver insulin to a patient; a glucose sensor to obtain observations of blood glucose concentration of the patient; and a controller to; assign a plurality of different threshold time periods to each of a plurality of different target blood glucose concentration levels for the patient, resulting in a plurality of different time-to-target checkpoints for the target blood glucose concentration levels, each of the plurality of different time-to-target checkpoints having a respective insulin infusion pump operation associated therewith; predict a respective duration of time for the patient'"'"'s blood glucose concentration to reach each of the target blood glucose concentration levels using an observed current blood glucose concentration of the patient; identify which of the target blood glucose concentration levels is predicted to be reached first in time; compare the predicted duration of time for the identified target blood glucose concentration level against the threshold time periods of the plurality of different time-to-target checkpoints of the identified target blood glucose concentration level, to determine an operation of the insulin infusion pump based on the predicted duration of time and the plurality of different time-to-target checkpoints; and altering a therapy applied to the patient based on the determined operation of the insulin infusion pump. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An insulin infusion device to deliver insulin to a patient, comprising:
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an infusion device housing; and a controller housed in the infusion device housing, the controller configurable to; assign a plurality of different threshold time periods to each of a plurality of different target blood glucose concentration levels for the patient, resulting in a plurality of different time-to-target checkpoints for the target blood glucose concentration levels, each of the plurality of different time-to-target checkpoints having a respective insulin infusion device operation associated therewith; obtain, from a glucose sensor, observations of blood glucose concentration of the patient; predict a respective duration of time for the patient'"'"'s blood glucose concentration to reach each of the target blood glucose concentration levels using an observed current blood glucose concentration of the patient; identify which of the target blood glucose concentration levels is predicted to be reached first in time; compare the predicted duration of time for the identified target blood glucose concentration level against the threshold time periods of the plurality of different time-to-target checkpoints of the identified target blood glucose concentration level, to determine an operation of the insulin infusion device based on the predicted duration of time and the plurality of different time-to-target checkpoints; and altering a therapy applied to the patient based on the determined operation of the insulin infusion device. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification