The bionic pancreas consists of three pieces of hardware. There’s an iPhone with an app that contains the system’s control software and algorithm and a continuous glucose monitor (CGM).
The CGM’s sensor/transmitter, worn under the skin, streams glucose (blood sugar) data to two connected infusion pumps. One delivers insulin to lower blood sugar and one delivers glucagon to raise it. Based on glucose levels transmitted every five minutes from the CGM, the app determines and dispatches how much insulin or glucagon should be delivered to maintain ideal blood sugar levels.