Bolus calculator (BC) is one of the advanced functions in modern insulin pumps (CSII)models. Together with wireless communication with blood glucose meter potentially facilitates achieving the target post prandial glucose levels. In this RCT authors assessed whether use of wireless communication between compatible devices: MiniMed insulin pump and blood glucose meter Contour Link (CL), Bayer results in more frequently bolus calculator using and what is the impact of exerting this tool on metabolic control in type 1 diabetic patients.

In this RCT 156 patients were randomly assigned to one of the 3 arms: group A- subjects using insulin pump bolus calculator wirelessly connected with blood glucose meter, group B- subjects using insulin pump bolus calculator without wireless communication with blood glucose meter or group C- insulin pump, without bolus calculator function. We compared the glycated hemoglobin levels and post- prandial hypoglycaemia after 3 months of observation between the groups. We also assessed secondary endpoints (mentioned above).

Patients were estimated at three time points: at the beginning, after 6 weeks and after 3 months of intervention. Investigators performed computer reports at each visit, with Medtronic CareLink Pro software.

Inclusion Criteria:

• 7- 18 years old
• type 1 diabetes mellitus for over 1 year
• treatment with insulin pump with bolus calculator function
• HbA1c < 10%
• expressed written informed consent

Exclusion Criteria:

• recall the consent