Understanding the impact of dietary nutrients on postprandial gastric retention (GR) and glucose absorption (GA) is crucial for optimizing both open- and closed-loop therapy in type 1 diabetes (T1D) . Here, we aim to investigate the effect of fat (F) content of a meal on both GR and GA in real life conditions, using a recently developed minimally invasive oral minimal model (MI-OMM) .

Data was collected during an outpatient 5-days clinical trial involving 1patients (age = 3-61 y; M/F = 60/50) wearing a sensor augmented insulin pump. At each meal, the medical staff recorded carbohydrate (C) and F intake. A total of 159 meals were analyzed that included >75% sensor data, C and F contents, no exercise sessions, or other meals/snacks within 2h before and 3h after the meal. Meals were grouped based on F content: high fat (HF, F≥30%) , and Low Fat (LF, F≤15%) .

The model well fitted glucose sensor data and provided estimated GR and GA curves. Fig. 1 shows that model-derived GR was significantly lower from 0.5h onward, and GA was significantly faster from 0.5h to 2.3h after a LF meal compared to a HF.

These findings proved that MI-OMM can be used to estimate GR and GA, using sensor data, in real life meals with different F content and, therefore, it is potentially applicable to optimize insulin therapy in T1D.


E.Faggionato: None. M.Schiavon: None. B.A.Buckingham: Advisory Panel; Arecor, Lilly Diabetes, Medtronic, Other Relationship; Insulet Corporation, Research Support; Insulet Corporation, Lilly Diabetes, Medtronic. L.Ekhlaspour: Consultant; Tandem Diabetes Care, Inc., Ypsomed AG. C.Dalla man: Research Support; Becton, Dickinson and Company, Sanofi-Aventis Deutschland GmbH.


This work was supported by MIUR (Italian Minister for Education) under the initiative “Departments of Excellence” (Law 232/2016) . Laya Ekhlaspour is funded by NIH (National Institutes of Health) 1K23DK121942.

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