Infusion pump system and methods
First Claim
Patent Images
1. A medical infusion pump system, comprising:
- a portable pump housing that receives insulin for dispensation to a user, the pump housing at least partially containing a pump drive system to dispense the insulin through a flow path to the user;
a controller that communicates with the pump drive system to dispense the insulin from the portable pump housing; and
a monitoring device that communicates glucose information to the controller, the glucose information being indicative of a blood glucose level of the user, wherein the controller is configured to;
predict a future blood glucose level of the user based at least in part upon a recent blood glucose level, a trend of blood glucose levels over time, and an insulin load of the user, operate in a low glucose recovery mode in which a basal rate is reduced as compared to a normal operational mode in response to the predicted future blood glucose level being less than a lower threshold value, and in response to the activation of the controller to operate in the low glucose recovery mode, automatically exit from the low glucose recovery mode and return to the normal operational mode based on a subsequent determination that the predicted future blood glucose level is greater than or equal to the lower threshold value, wherein the controller is further configured to operate in a high glucose recovery mode in which a basal rate is temporarily increased in response to the predicted future blood glucose level being greater than an upper threshold level; and
wherein in response to the controller calculating the predicted future blood glucose level being less than the lower threshold value, the controller automatically cancels any previously scheduled bolus amount of insulin to be dispensed from the portable pump housing and informs the user of how much bolus was missed.
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Abstract
Some embodiments an infusion pump system can be configured to activate an alarm in response to a calculated prediction of the user'"'"'s future blood glucose levels. Optionally, the predictive calculation of the user'"'"'s future blood glucose levels can be based at least in part upon a recent blood glucose level, a trend of blood glucose levels over time, and an insulin load of the user.
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Citations
23 Claims
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1. A medical infusion pump system, comprising:
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a portable pump housing that receives insulin for dispensation to a user, the pump housing at least partially containing a pump drive system to dispense the insulin through a flow path to the user; a controller that communicates with the pump drive system to dispense the insulin from the portable pump housing; and a monitoring device that communicates glucose information to the controller, the glucose information being indicative of a blood glucose level of the user, wherein the controller is configured to;
predict a future blood glucose level of the user based at least in part upon a recent blood glucose level, a trend of blood glucose levels over time, and an insulin load of the user, operate in a low glucose recovery mode in which a basal rate is reduced as compared to a normal operational mode in response to the predicted future blood glucose level being less than a lower threshold value, and in response to the activation of the controller to operate in the low glucose recovery mode, automatically exit from the low glucose recovery mode and return to the normal operational mode based on a subsequent determination that the predicted future blood glucose level is greater than or equal to the lower threshold value, wherein the controller is further configured to operate in a high glucose recovery mode in which a basal rate is temporarily increased in response to the predicted future blood glucose level being greater than an upper threshold level; andwherein in response to the controller calculating the predicted future blood glucose level being less than the lower threshold value, the controller automatically cancels any previously scheduled bolus amount of insulin to be dispensed from the portable pump housing and informs the user of how much bolus was missed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A controller for an insulin infusion pump system, comprising:
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a processor; one or more computer-readable memory devices that store glucose information received from a monitoring device and time values associated with the glucose information, wherein the one or more computer-readable memory devices store computer-readable instructions for a blood glucose prediction process that, when executed by the processor, cause the controller to; calculate a predicted future blood glucose level of the user based at least in part upon a recent blood glucose level of a user, a trend of blood glucose levels over time, and an insulin load of the user; output an alarm in response to the predicted future blood glucose level being less than a lower threshold value; and operate in a low glucose recovery mode in response to user input that accepts activation of the low glucose recovery mode; and in response to the activation of the controller to operate in the low glucose recovery mode, automatically exit from the low glucose recovery mode based on a subsequent determination that the predicted future blood glucose level is greater than or equal to the lower threshold value and return to a normal operational mode; wherein a basal rate is reduced in the low glucose recovery mode as compared to the normal operational mode; wherein a previously scheduled bolus amount of insulin is canceled in the low glucose recovery mode and the alarm informs the user of how much bolus was missed; and output an alarm in response to the predicted future blood glucose level being greater than an upper threshold level; and operate in a high glucose recovery mode in response to user input that accepts activation of the high glucose recovery mode, wherein a basal rate is temporarily increased in the high glucose recovery mode as compared to the normal operational mode. - View Dependent Claims (14)
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15. A method of operating an insulin infusion pump system, comprising:
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receiving, at a controller of an insulin infusion pump system, glucose information indicative of a glucose level of a user; determining an insulin load value indicative of an estimated value of previously dispensed insulin that has not yet acted in the user; calculating, at the controller of the insulin infusion pump system, a predicted future blood glucose level of the user based at least in part upon a recent glucose level of the user, a trend of blood glucose levels over time, and the insulin load of the user; in response to the predicted future blood glucose level being less than a lower threshold value or greater than a higher threshold value, outputting an alarm from the insulin infusion pump system; operating in a low glucose recovery mode in which a basal rate is reduced as compared to a normal operational mode in response to the predicted future blood glucose level being less than a lower threshold value; and automatically exiting from the low glucose recovery mode and returning to the normal operational mode based on a subsequent determination that the predicted future blood glucose level is greater than or equal to the lower threshold value, in response to the activation of the controller to operate in the low glucose recovery mode; and canceling any previously scheduled bolus amount of insulin to be dispensed from the portable pump housing and informing the user of how much bolus was missed in response to the controller calculating the predicted future blood glucose level being less than the lower threshold value; operating in a high glucose recovery mode in which a basal rate is temporarily increased as compared to a normal operational mode in response to the predicted future blood glucose level being greater than an upper threshold level. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A method of operating an insulin infusion pump system, comprising:
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receiving, at a controller of an insulin infusion pump system, glucose information indicative of a glucose level of a user; determining an insulin load value indicative of an estimated value of previously dispensed insulin that has not yet acted in the user; calculating, at the controller of the insulin infusion pump system, a predicted future blood glucose level of the user based at least in part upon a recent glucose level of the user, a trend of blood glucose levels over time, and the insulin load of the user; and in response to the predicted future blood glucose level being less than a lower threshold value or greater than a higher threshold value, outputting an alarm from the insulin infusion pump system; further comprising, in response to the predicted future blood glucose level being less than the lower threshold value, prompting the user to confirm activation of a low glucose recovery mode for the insulin infusion pump system; wherein in response to user input confirming the activation of the low glucose recovery mode for the insulin infusion pump system, the method further comprises; reducing but not stopping a basal rate amount of insulin to be dispensed from the insulin infusion pump system; canceling any previously scheduled bolus amount of insulin to be dispensed from the portable pump housing in response to the controller calculating the predicted future blood glucose level being less than the lower threshold value and informing the user of how much bolus was missed subsequently predicting the future blood glucose level of the user based upon updated glucose information indicative of the glucose level of a user, an updated trend of blood glucose levels over time, and an updated insulin load of the user; and activating the insulin infusion pump system to return to a normal operational mode in response to the subsequently predicted future blood glucose level being greater than or equal to the lower threshold level; and operating in a high glucose recovery mode in which a basal rate is temporarily increased as compared to a normal operational mode in response to the predicted future blood glucose level being greater than an upper threshold level. - View Dependent Claims (23)
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Specification