Fluid infusion system that automatically determines and delivers a correction bolus

An insulin infusion device comprising:

• 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.

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:

• 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.