Aims: Consumption of glucose or foodstuff s with high glycaemic index (GI) in persons with type 1 diabetes mellitus(PWD1) is a hot topic in present diabetology. The aim of our pilot prospective study was to assess the effi ciencyof empirically suggested simple algorithms for premeal boluses in PWD1 using insulin pumps and continuous glucosemonitoring (CGM). Methods: Six PWD1 (aged 46.2±15.09 y, diabetes duration 14.5±9.65 y, HbA1c/IFCC 6.3±1.59%, BMI 23.6±1.67kg/m2, mean±SD) on insulin pumps Paradigm 522/722 with RT-CGMS sensors (Medtronic MiniMed, Northridge, CA)underwent a 12-week CGM. In one week, subjects consumed 50g of carbohydrates in eleven alternative meals (ricesquares, dark chocolate, white bread, honey, glucose, ravioli with meat and Eidam cheese, mashed potatoes with fi shfi ngers, apricot dumplings with butter, spa waffl es, spalta squares, and tomato soup with pasta) eaten for breakfasts,lunches, snacks and dinners in order to calculate their GI. The insulin boluses were adjusted according to empiricallydefi ned algorithms. Average glucose levels and daily insulin doses over three one-week periods (before testing, testingand after testing) were compared. Results: During the observational period, the weekly averages of glucose levels (9.1±2.33 mmol/l vs. 9.2±2.30mmol/l vs. 9.0±2.43 mmol/l, respectively) and daily insulin doses (39.1± 8.14 IU/d vs. 39.7±10.7 IU/d vs. 38.6±9.97IU/d, respectively) were similar. One-week consumption of high GI foodstuff s had only a negligeable eff ect on averageglucose levels.Conclusion: The suggested algorithms for premeal insulin boluses appear to limit the risk of potential hyperglycaemiaresulting from intake of high GI foodstuff s.

Department of Physiology 2nd Department of Medicine Faculty of Medicine and Dentistry Palacký University Olomouc

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