Although more commercial hybrid closed-loop insulin delivery systems are becoming available, the number of people using DIY open source automated insulin delivery (OS AID) systems (also called DIY artificial pancreas systems – DIY APS) continues to rise. As their name suggests, such DIY systems have not undergone the usual regulatory approvals procedures and thus present some legal difficulties for actors involved in diabetes care, including clinicians, parents building OS AID systems for their children, and adult users themselves. We argue in the paper...learn more