METHOD AND SYSTEM TO HANDLE MANUAL BOLUSES OR MEAL EVENTS FOR CLOSED-LOOP CONTROLLERS
First Claim
1. A diabetes management system comprising:
- an infusion pump configured to deliver insulin to a subject;
a glucose sensor configured to sense glucose levels in the subject and provide output signals representative of the glucose levels in the subject;
a controller that receives signals from at least one of the glucose sensor and the pump, the controller configured to issue signals to the pump to deliver an amount of insulin determined by a feedback controller that utilizes a model predictive control of the subject based on desired glucose levels, insulin amount delivered and measured glucose levels of the subject, the controller configured to deliver at least the basal amount of insulin whenever the subject has initiated a manual bolus of insulin and a sensed or measured glucose level of is at least a first threshold within a first duration of time.
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Accused Products
Abstract
Described and illustrated is a diabetes management system that includes an infusion pump, glucose sensor and controller with a method programmed into the controller. The infusion pump is configured to deliver insulin to a subject. The glucose sensor is configured to sense glucose levels in the subject and provide output signals representative of the glucose levels in the subject. The controller is programmed to receive signals from at least one of the glucose sensor and the pump and configured to issue signals to the pump to deliver an amount of insulin determined by a feedback controller that utilizes a model predictive control and also configured to deliver at least the basal amount of insulin whenever the subject has initiated a manual bolus of insulin and a sensed or measured glucose level is at least a first threshold within a first duration of time.
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Citations
10 Claims
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1. A diabetes management system comprising:
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an infusion pump configured to deliver insulin to a subject; a glucose sensor configured to sense glucose levels in the subject and provide output signals representative of the glucose levels in the subject; a controller that receives signals from at least one of the glucose sensor and the pump, the controller configured to issue signals to the pump to deliver an amount of insulin determined by a feedback controller that utilizes a model predictive control of the subject based on desired glucose levels, insulin amount delivered and measured glucose levels of the subject, the controller configured to deliver at least the basal amount of insulin whenever the subject has initiated a manual bolus of insulin and a sensed or measured glucose level of is at least a first threshold within a first duration of time. - View Dependent Claims (2, 3)
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4. A method to manage diabetes of a subject with an infusion pump, controller, and at least one glucose sensor, the method comprising:
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measuring glucose level in the subject from the glucose sensor to provide a plurality of glucose measurements; calculating insulin amount by the controller for delivery based on a model predictive controller that utilizes the plurality of glucose measurements to predict a trend of the glucose level from estimates of a metabolic state of the subject so as to provide a calculated insulin amount to be delivered to the subject over a predetermined interval; determining whether the subject initiated a manual bolus while the glucose level is at least a first glucose threshold within a first time period; and in the event the determining step is true, constraining insulin delivery to be at least the basal amount. - View Dependent Claims (6, 7, 8, 9, 10)
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5. A method to manage diabetes of a subject with an infusion pump, controller, and at least one glucose sensor, the method comprising:
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measuring glucose level in the subject from the glucose sensor to provide a plurality of glucose measurements; calculate a basal rate for delivery to the subject; determining whether the subject initiated a manual bolus with the glucose level being at a level of at least a first glucose threshold within a first time period; in the event the determining is true, constraining the infusion pump to deliver insulin at the basal rate; in the event the determining is false, limiting the infusion pump to deliver at approximately zero rate; calculating insulin dosing based on the constraining and limiting steps; and commanding the pump to deliver insulin dosing calculated by the calculating step.
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Specification