Automated system for regulating a patient's blood glucose level

An automated system for regulation of a patient's blood glucose, comprising:

• a blood glucose sensor;
• an insulin injection device;
• and
• a processing and control unit,
• wherein the processing and control unit is capable of:
• a) implementing, taking into account a real blood glucose measured by the sensor during a past observation period, a step of automated calibration of a physiological model capable of predicting evolution of the patient's blood glucose;
• b) at an end of the step of automated calibration, calculating at least one numerical indicator representative of an error between a blood glucose estimated from the model and the real blood glucose measured by the sensor over the past observation period;
• c) determining a duration of a prediction period to come, taking into account a value of said at least one numerical indicator, the duration of the prediction period to come being selected to be shorter as the error between the blood glucose estimated from the model and the real blood glucose measured by the sensor over the past observation period is larger;
• and
• d) predicting, from the physiological model, a future evolution of the patient's blood glucose over the prediction period to come, and controlling the insulin injection device by taking into account a prediction obtained from the predicting.