Fig. 1
From: Closed-loop for type 1 diabetes – an introduction and appraisal for the generalist
a A closed-loop system comprising a glucose sensor (black rectangle on the left-hand side of the abdomen), an insulin pump (device in the pocket), and a mobile-sized device containing the control algorithm (in patient’s hand). Each component communicates with the other wirelessly (adapted from Hovorka [32]). b The closed-loop system mimics the physiological feedback normally provided by the pancreatic beta cell