Algorithm sensor augmented bolus estimator for semi-closed loop infusion system
First Claim
1. An infusion system for infusing a fluid into the body of a patient, the infusion system comprising:
- at least one sensor for monitoring blood glucose concentration of the patient, wherein the sensor produces at least one sensor signal input; and
an infusion device for delivering fluid to the patient, wherein the infusion device uses the at least one sensor signal input and a derivative predicted algorithm to determine future blood glucose levels.
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Abstract
An infusion system is for infusing a fluid into the body of a patient. The infusion system includes at least one sensor for monitoring blood glucose concentration of the patient and an infusion device for delivering fluid to the patient. The sensor produces at least one sensor signal input. The infusion device uses the at least one sensor signal input and a derivative predicted algorithm to determine future blood glucose levels. The infusion device delivers fluid to the patient when future blood glucose levels are in a patient'"'"'s target range. The infusion device is capable of suspending and resuming fluid delivery based on future blood glucose levels and a patient'"'"'s low shutoff threshold. The infusion device suspends fluid delivery when future blood glucose levels falls below the low shutoff threshold. The infusion device resumes fluid delivery when a future blood glucose level is above the low shutoff threshold.
842 Citations
17 Claims
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1. An infusion system for infusing a fluid into the body of a patient, the infusion system comprising:
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at least one sensor for monitoring blood glucose concentration of the patient, wherein the sensor produces at least one sensor signal input; and
an infusion device for delivering fluid to the patient, wherein the infusion device uses the at least one sensor signal input and a derivative predicted algorithm to determine future blood glucose levels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An infusion system for infusing a fluid into the body of a patient, the system comprising:
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a sensor system that includes a sensor for monitoring blood glucose concentration of a patient, and produces at least one sensor signal, which is representative of the blood glucose concentration of the patient, and wherein the at least one sensor signal is used to generate at least one sensor signal input;
a controller, wherein the controller uses the at least one sensor signal input to determine at least one sensor-derived blood glucose trend, and wherein the at least one sensor-derived blood glucose trend is used to determine blood glucose levels at a predetermined time in the future; and
a delivery system that infuses a fluid into the patient, wherein operation of the delivery system is affected by commands from the controller and the patient. wherein the controller suspends fluid delivery if the at least one sensor-derived trend yields at least one blood glucose level reading that is below a predefined low shutoff threshold. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method of predicting blood glucose concentration of a patient, the method comprising the steps of:
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measuring current blood glucose concentration using a sensor, wherein the sensor yields at least one sensor signal input which is representative of the current blood glucose concentration, inputting the at least one sensor signal input to a derivative predicted algorithm, and determining the future blood glucose concentration using the derivative predicted algorithm.
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Specification