Insulin pump based expert system

A system comprising:

• a pump configured to deliver insulin;
• an input configured to receive sensor glucose data representative of a blood glucose level of a user from a continuous glucose monitor via a wireless connection;
• and
• a controller communicatively coupled to the pump and the input, the controller configured to:
• monitor the sensor glucose data from the continuous glucose monitor while the pump is delivering a basal rate of insulin to the user;
• compare the sensor glucose data to a target low glucose level;
• determine a rate of change of the blood glucose level of the user from the sensor glucose data;
• generally continuously monitor the rate of change;
• determine based on the generally continuous monitoring of the rate of change that, although the sensor glucose data does not indicate that the glucose level of the user is below the target low glucose level that the rate of change indicates that the glucose level of the user is at risk of going below the target low glucose level due to the basal rate of insulin being delivered to the user;
• provide a message on a user interface relating to the risk of going below the target low glucose level;
• and
• reducing a rate of basal insulin being delivered to the user in response to the risk of going below the target low glucose level.