Closed loop system for controlling insulin infusion

(57) A summary closed-loop pouring system controls the speed of the fluid injected into a user's inside of the body. A closed-loop pouring system contains a sensor system, a control device, and a delivery system. A sensor system contains the sensor for monitoring a user's condition. A sensor emits the sensor signal showing a user's condition. A control device input is emitted using a sensor signal. A control device generates the command for operating a delivery system using a control device input. A delivery system pours a liquid into a user at the speed directed by the command from a control device. Preferably, a sensor system monitors the glucose concentration of a user's inside of the body, and an insulin is contained in the liquid injected into a user's inside of the body by a delivery system. A sensor system generates the message sent to a delivery system using a sensor signal. The information used in order to make a message generate a control device input is included. A sensor may be a subcutaneous part sensor in contact with intercellular fluid. Moreover, a sensor system may use two or more sensors.