Background and Aims: Meal management is a major challenge for people with type 1 diabetes (PWD) . We aimed to explore 3 approaches to complex meal planning, from a most comprehensive scheme in open loop (OL) to a simplified, carbohydrate (CHO) counting-free scheme when using the MiniMed™ 780G system AHCL.

Methods: Participants (N=13, mean age 46.8±12.8 years and baseline A1C of 6.1±1.2%) consumed a high fat, high protein, meal using 3 types of insulin boluses;

  • 1) OL utilizing the dual-wave bolus and elaborate CHO counting;

  • 2) AHCL with accurate CHO amount;

  • 3) AHCL with a predefined bolus and no CHO counting,

Results: No significant differences in TIR and 5-hour iAUC were observed between the 3 bolus groups (P=0.401, P=0.526, respectively) There were no significant differences in other glucose metrics. (Table 1)

Conclusion: Our results indicate that glycemic control following a complex meal challenge is similar when using AHCL with or without accurate CHO counting and with less tendency for hypoglycemia when compared with the most elaborate meal management in OL. Thus, the current burden of meal management for PWD during OL system use is alleviated with AHCL.


M.Laron hirsh: None. R.Shalit: Speaker's Bureau; AstraZeneca, Boehringer Ingelheim International GmbH, Eli Lilly and Company, Medtronic, Novo Nordisk. S.Shalem: None. O.Cohen: Employee; Medtronic. N.Kurtz: Employee; Medtronic. A.Roy: Employee; Medtronic. B.Grosman: Employee; Medtronic. T.Cukierman-yaffe: Research Support; European Association for the Study of Diabetes, Medtronic, Merck Sharp & Dohme Corp., Novo Nordisk, Speaker's Bureau; AstraZeneca, Eli Lilly and Company, Medtronic, Merck Sharp & Dohme Corp., Novo Nordisk, Sanofi. A.Tirosh: Advisory Panel; Abbott Diagnostics, AstraZeneca, Boehringer Ingelheim International GmbH, Merck & Co., Inc., Novo Nordisk, Sanofi, Consultant; Bayer AG, DreaMed Diabetes, Ltd., Research Support; Medtronic, Speaker's Bureau; Eli Lilly and Company.

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