Safety of Overestimation of a Meal Insulin Bolus in the Context of Dual-hormone Closed-loop Operation

Interventions will be undertaken one to 5 days after sensor insertion. Subjects will be admitted at the research center at 7:00 am. Subject's pump will be substituted with the study pump and an additional pump containing glucagon will be installed. At 7:00, CLS will be initiated. At 9:00, a standardized breakfast (75g CHO) will be served. Study subjects will consume the same meal on the two intervention days. During the intervention, patients will be allowed to do sedentary activities. Patients will allowed to consume caffeine during the intervention, but will have to replicate their caffeine consumption on both interventions.The intervention day will end at 13:00.

Participant's usual fast-acting insulin analog will be used: Lispro (Humalog), Aspart (NovoRapid) or Glulisine (Apidra)

Glucagon (Eli Lilly) will be used during dual-hormone closed-loop strategy.