Device and method for therapy calibration and safety response
First Claim
1. A method for providing therapy modification in an infusion system, the method comprising:
- delivering insulin at a current basal rate in an existing basal pattern for a user;
obtaining a plurality of measured blood glucose values including a current measured blood glucose value and historical measured blood glucose values;
triggering an alarm when the current measured blood glucose value is higher or lower than a target blood glucose value;
informing the user that calibration of a glucose sensor system needs to be performed when the alarm is triggered;
prompting the user to decide whether the calibration is to be performed;
performing the calibration if the user decides to perform the calibration;
determining a basal rate adjustment from the current basal rate to an adjusted basal rate if the user decides not to perform the calibration in order to bring the current measured blood glucose value to be consistent with the target blood glucose value, wherein the basal rate adjustment is limited to be within a boundary based on the current basal rate; and
delivering insulin at the adjusted basal rate if the basal rate adjustment is within the boundary.
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Abstract
A closed loop/semi-closed loop infusion system provides therapy modification and safeguards against the over-delivery or under-delivery of insulin. A glucose sensor system is configured to obtain a measured blood glucose value. A controller is operationally connected with the glucose sensor system and configured to trigger an alarm based on a measured blood glucose value or amount of insulin delivered, selectively perform calibration of the glucose sensor system when the alarm is triggered, and adjust a therapy delivery parameter when the alarm is triggered, wherein the adjusted therapy delivery parameter is limited to be within a boundary. Thereafter, a delivery system delivers therapy at the adjusted therapy delivery parameter.
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Citations
20 Claims
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1. A method for providing therapy modification in an infusion system, the method comprising:
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delivering insulin at a current basal rate in an existing basal pattern for a user; obtaining a plurality of measured blood glucose values including a current measured blood glucose value and historical measured blood glucose values; triggering an alarm when the current measured blood glucose value is higher or lower than a target blood glucose value; informing the user that calibration of a glucose sensor system needs to be performed when the alarm is triggered; prompting the user to decide whether the calibration is to be performed; performing the calibration if the user decides to perform the calibration; determining a basal rate adjustment from the current basal rate to an adjusted basal rate if the user decides not to perform the calibration in order to bring the current measured blood glucose value to be consistent with the target blood glucose value, wherein the basal rate adjustment is limited to be within a boundary based on the current basal rate; and delivering insulin at the adjusted basal rate if the basal rate adjustment is within the boundary. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An infusion system for providing therapy modification, the system comprising:
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a glucose sensor system; a delivery system configured to deliver insulin into a user; and a controller operationally connected with the glucose sensor system and the delivery system, wherein the controller causes the delivery system to deliver insulin at a current basal rate in an existing basal pattern for the user, obtains a plurality of measured blood glucose values including a current measured blood glucose value and historical measured blood glucose values, triggers an alarm when the current measured blood glucose value is higher or lower than a target blood glucose value, informs the user that calibration of the glucose sensor system needs to be performed when the alarm is triggered, prompts the user to decide whether the calibration is to be performed, performs the calibration if the user decides to perform the calibration, determines a basal rate adjustment from the current basal rate to an adjusted basal rate if the user decides not to perform the calibration in order to bring the current measured blood glucose value to be consistent with the target blood glucose value, wherein the basal rate adjustment is limited to be within a boundary based on the current basal rate, and causes the delivery system to deliver insulin at the adjusted basal rate if the basal rate adjustment is within the boundary. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification