Closed loop/semi-closed loop therapy modification system
First Claim
1. A method for providing therapy modification in an infusion system, the method comprising:
- continuously delivering insulin according to a therapy delivery parameter based on a measured blood glucose value;
triggering an alarm based on the measured blood glucose value or an amount of insulin delivered;
automatically adjusting the therapy delivery parameter when the alarm is triggered such that the adjusted therapy delivery parameter is limited to be within a boundary;
comparing an expected insulin on board (IOB) value to an actual IOB value; and
determining that insulin action is delayed if the actual IOB value is within a predetermined range of the expected IOB value,wherein the alarm is not triggered if it is determined that insulin action is delayed even if the measured blood glucose value is not consistent with a target blood glucose value, or the amount of insulin delivered is not consistent with an expected amount of delivered insulin.
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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
24 Claims
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1. A method for providing therapy modification in an infusion system, the method comprising:
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continuously delivering insulin according to a therapy delivery parameter based on a measured blood glucose value; triggering an alarm based on the measured blood glucose value or an amount of insulin delivered; automatically adjusting the therapy delivery parameter when the alarm is triggered such that the adjusted therapy delivery parameter is limited to be within a boundary; comparing an expected insulin on board (IOB) value to an actual IOB value; and determining that insulin action is delayed if the actual IOB value is within a predetermined range of the expected IOB value, wherein the alarm is not triggered if it is determined that insulin action is delayed even if the measured blood glucose value is not consistent with a target blood glucose value, or the amount of insulin delivered is not consistent with an expected amount of delivered insulin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An infusion system for providing therapy modification, the system comprising:
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a glucose sensor system; and a controller operationally connected with the glucose sensor system, wherein the controller controls a delivery system that continuously delivers insulin according to a therapy delivery parameter based on a measured blood glucose value, triggers an alarm based on the measured blood glucose value or an amount of insulin delivered, automatically adjusts the therapy delivery parameter when the alarm is triggered such that the adjusted therapy delivery parameter is limited to be within a boundary, compares an expected insulin on board (IOB) value to an actual IOB value, determines that insulin action is delayed if the actual IOB value is within a predetermined ranged of the expected IOB value so that the alarm is not triggered if it is determined that insulin action is delayed even if the measured blood glucose value is not consistent with a target blood glucose value, or the amount of insulin delivered is not consistent with an expected amount of delivered insulin. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification