Aim: Evaluation of six months experience on MiniMed 670G Hybrid Closed Loop (HCL) system in patients with type 1 diabetes (T1D), previously treated with Multiple Daily Injections (MDI).

Methods: This is a 6-months prospective observational study of patients (7 to 18 years) with T1D on MDI, starting the MiniMed 670G system, using a 10-day initiation protocol: 2-days, HCL system assessment; 5-days, HCL system training (2-hours sessions in 5 consecutive days); 3-days, Manual Mode use of HCL system and 6 months, Auto Mode use of the HCL system.

Results: MiniMed 670G was initiated in 47 patients (age 12.2±3.2 years). All patients used the system for six months period. Auto Mode usage was 87.2% at the first month and 89.6% at the 6-months of Auto Mode initiation. The mean HbA1c decreased from 8.4±1.5% (68±16.4 mmol/mol) at baseline, 6.7±0.8% (50±8.7 mmol/mol) at 3-months (p=0.021), to 6.9±0.7% (52±7.7 mmol/mol) at 6-months of MiniMed 670G initiation (p=0.024). Time in Range (70-180mg/dL) significantly increased over the time (Figure 1). No severe hypoglycemia nor DKA were found.

Conclusion: Children and adolescents with T1D can successfully initiate the HCL system, achieve and maintain better glycemic control than previous MDI regimen. Low attrition rate and the sustainability of the results are likely due to patients’ selection, structured educational program and HCL system by itself.


G. Petrovski: None. J. Campbell: None. F. AlKhalaf: None. F. Umer: None. K. Hussain: None.

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