Background: Many patients with type 1 diabetes mellitus are switching from sensor-augmented insulin pump therapy to an artificial pancreas system for various reasons. Since there are no suitable approved Automated Insulin Delivery -AID system in Austria, open-source systems are increasingly being used. The question arises, how does glycemic control change after switching?

Methods: This monocentric retrospective data analysis from 20to 2021 will compare sensor-augmented pump therapy with the open-source AID system using AGP profiles from 25 patients with type 1 diabetes mellitus. The AGP are generated from sensor data 4 weeks with pump therapy AGP1 and 4 weeks with open-source AID system AGP2. AGP is generated with Dexcom application.

Results: Comparing AGP1 and 2 shows a significant reduction of mean glucose from 143mg/dl to 125mg/dl and glucose variability from 50mg/dl to 40mg/dl. The time in target range can be increased from 74% to 84% without changing the time in hypoglycemia. Time in hyperglycemia above 180 and 250 mg/dl and GMI decreased significantly.

Conclusion: Open-source AID system can achieve an improvement in glycemic control. In this data analysis, the open-source AID systems can be considered safe due to the lack of increase in hypoglycemia.

Disclosure

M. Mueller-Korbsch: Research Support; Dexcom, Inc.

Readers may use this article as long as the work is properly cited, the use is educational and not for profit, and the work is not altered. More information is available at http://www.diabetesjournals.org/content/license.