Fluid infusion system that automatically determines and delivers a correction bolus
First Claim
1. A method of controlling operation of an insulin infusion device comprising a fluid reservoir for insulin to be delivered from the insulin infusion device to a body of a user, and further comprising at least one processor device to perform the method, comprising:
- controlling the insulin infusion device to operate in an automatic basal insulin delivery mode;
obtaining a blood glucose measurement that indicates a current blood glucose level of the user;
initiating a correction bolus procedure when;
(1) the blood glucose measurement exceeds a correction bolus threshold value; and
(2) a maximum allowable basal insulin infusion rate (Umax) has been reached during operation in the automatic basal insulin delivery mode, the correction bolus procedure comprising;
calculating an initial correction bolus amount for the user;
scaling the initial correction bolus amount to obtain a final correction bolus amount for the user, such that a predicted future blood glucose level of the user resulting from simulated delivery of the final correction bolus amount exceeds a low blood glucose threshold level; and
delivering the final correction bolus amount to the body of the user during operation in the automatic basal insulin delivery mode.
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Accused Products
Abstract
A method of controlling an insulin infusion device involves controlling the device to operate in an automatic basal insulin delivery mode, obtaining a blood glucose measurement for the user, and initiating a correction bolus procedure when: the measurement exceeds a correction bolus threshold value; and a maximum basal insulin infusion rate is reached during the automatic basal insulin delivery mode. The correction bolus procedure calculates an initial correction bolus amount, and scales the initial amount to obtain a final correction bolus amount, such that a predicted future blood glucose level resulting from simulated delivery of the final correction bolus amount exceeds a low blood glucose threshold level. The final amount is delivered to the user during operation in the automatic basal insulin delivery mode.
107 Citations
20 Claims
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1. A method of controlling operation of an insulin infusion device comprising a fluid reservoir for insulin to be delivered from the insulin infusion device to a body of a user, and further comprising at least one processor device to perform the method, comprising:
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controlling the insulin infusion device to operate in an automatic basal insulin delivery mode; obtaining a blood glucose measurement that indicates a current blood glucose level of the user; initiating a correction bolus procedure when;
(1) the blood glucose measurement exceeds a correction bolus threshold value; and
(2) a maximum allowable basal insulin infusion rate (Umax) has been reached during operation in the automatic basal insulin delivery mode, the correction bolus procedure comprising;calculating an initial correction bolus amount for the user; scaling the initial correction bolus amount to obtain a final correction bolus amount for the user, such that a predicted future blood glucose level of the user resulting from simulated delivery of the final correction bolus amount exceeds a low blood glucose threshold level; and delivering the final correction bolus amount to the body of the user during operation in the automatic basal insulin delivery mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An insulin infusion device comprising:
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a fluid reservoir for insulin to be delivered from the insulin infusion device to a user; at least one processor device; and at least one memory element associated with the at least one processor device, the at least one memory element storing processor-executable instructions configurable to be executed by the at least one processor device to perform a method of controlling delivery of insulin from the insulin reservoir to the user, the method comprising; controlling the insulin infusion device to operate in an automatic basal insulin delivery mode; obtaining a blood glucose measurement that indicates a current blood glucose level of the user; and initiating a correction bolus procedure when;
(1) the blood glucose measurement exceeds a correction bolus threshold value; and
(2) a maximum allowable basal insulin infusion rate (Umax) has been reached during operation in the automatic basal insulin delivery mode, the correction bolus procedure comprising;calculating an initial correction bolus amount for the user; scaling the initial correction bolus amount to obtain a final correction bolus amount for the user, such that a predicted future blood glucose level of the user resulting from simulated delivery of the final correction bolus amount exceeds a low blood glucose threshold level; and delivering the final correction bolus amount to the body of the user during operation in the automatic basal insulin delivery mode. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A tangible and non-transitory electronic storage medium having processor-executable instructions configurable to be executed by at least one processor device to perform a method of controlling delivery of insulin from a fluid reservoir of an insulin infusion device to a user, the method comprising:
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controlling the insulin infusion device to operate in an automatic basal insulin delivery mode; obtaining a blood glucose measurement that indicates a current blood glucose level of the user; and initiating a correction bolus procedure when;
(1) the blood glucose measurement exceeds a correction bolus threshold value; and
(2) a maximum allowable basal insulin infusion rate (Umax) has been reached during operation in the automatic basal insulin delivery mode, the correction bolus procedure comprising;calculating an initial correction bolus amount for the user; scaling the initial correction bolus amount to obtain a final correction bolus amount for the user, such that a predicted future blood glucose level of the user resulting from simulated delivery of the final correction bolus amount exceeds a low blood glucose threshold level; and delivering the final correction bolus amount to the body of the user during operation in the automatic basal insulin delivery mode. - View Dependent Claims (18, 19, 20)
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Specification