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Closed-Loop Method for Controlling Insulin Infusion

a closed-loop, insulin-injection technology, applied in the direction of instruments, catheters, applications, etc., can solve the problem of less desirable use of traditional external infusion pumps by users, and achieve the effect of reducing the accuracy of sensor signals

Inactive Publication Date: 2008-08-07
MEDTRONIC MIMIMED INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although offering control, pump therapy can suffer from several complications that make use of traditional external infusion pumps less desirable for the user.

Method used

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  • Closed-Loop Method for Controlling Insulin Infusion
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Examples

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Embodiment Construction

[0088]As shown in the drawings for purposes of illustration, the invention is embodied in a closed loop infusion system for regulating the rate of fluid infusion into a body of a user based on feedback from an analyte concentration measurement taken from the body. In particular embodiments, the invention is embodied in a control system for regulating the rate of insulin infusion into the body of a user based on a glucose concentration measurement taken from the body. In preferred embodiments, the system is designed to model a pancreatic beta cell (β-cell). In other words, the system controls an infusion device to release insulin into a body of a user in a similar concentration profile as would be created by fully functioning human β-cells when responding to changes in blood glucose concentrations in the body.

[0089]Thus, the system simulates the body's natural insulin response to blood glucose levels and not only makes efficient use of insulin, but also accounts for other bodily func...

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Abstract

A closed loop infusion system controls the rate that fluid is infused into the body of a user. The closed loop infusion system includes a sensor system, a controller, and a delivery system. The sensor system includes a sensor for monitoring a condition of the user. The sensor produces a sensor signal, which is representative of the condition of the user. The sensor signal is used to generate a controller input. The controller uses the controller input to generate commands to operate the delivery system. The delivery system infuses a liquid into the user at a rate dictated by the commands from the controller. Preferably, the sensor system monitors the glucose concentration in the body of the user, and the liquid infused by the delivery system into the body of the user includes insulin.

Description

RELATED APPLICATIONS[0001]This application is continuation-in-part of U.S. application Ser. No. 09 / 586,175 filed Jun. 1, 2000, entitled “Closed Loop System For Controlling Insulin Infusion,” which claims priority on U.S. Provisional Application Ser. No. 60 / 137,601 filed Jun. 3, 1999, entitled “Closed Loop Algorithms For Continuous Monitoring And Insulin Infusion,” and U.S. Provisional Application Ser. No. 60 / 162,255 filed Oct. 29, 1999 and entitled “Closed Loop Algorithms For Continuous Monitoring And Insulin Infusion,” all of which are specifically incorporated by reference herein.FIELD OF THE INVENTION[0002]This invention relates to closed loop drug delivery systems and more specifically to systems for controlling the infusion rate of insulin based on continuously monitored body glucose levels.BACKGROUND OF THE INVENTION[0003]The pancreas of a normal healthy person produces and releases insulin into the blood stream in response to elevated blood plasma glucose levels. Beta cells (...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61M5/142A61B5/00G01N27/26A61B5/145A61B5/1486A61M1/36A61M5/00A61M5/158A61M5/172G01N27/416
CPCA61B5/14532G06F19/3468A61B5/14865A61B5/1495A61B5/4839A61B5/6849A61B5/7242A61M5/14244A61M5/158A61M5/1582A61M5/1723A61M2005/1581A61M2005/1726A61M2230/201A61B5/14539G16H20/17
Inventor STEIL, GARRY M.REBRIN, KERSTIN
Owner MEDTRONIC MIMIMED INC
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