Method and system for controlling a tuning factor due to sensor replacement for closed-loop controller in an artificial pancreas
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United States of America Patent
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Oct 25, 2016
Grant Date -
Apr 9, 2015
app pub date -
Oct 4, 2013
filing date -
Oct 4, 2013
priority date (Note) -
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Abstract
Described and illustrated is a system for management of diabetes that includes an infusion pump, glucose sensor and controller with a method programmed in the controller. The infusion pump is configured to deliver insulin. The glucose sensor senses glucose levels in the subject and provide output signals representative of the glucose levels in the subject. The controller is programmed receives 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 based on desired glucose levels, insulin amount delivered and measured glucose levels of the subject. The controller is also configured to deliver insulin using a tuning factor (R) for a model predictive controller in the microcontroller as a conservative setting otherwise the system maintains a current tuning factor (R) for the controller.
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