80-OR: 670G Clinical Experience

Objective: In September 2016, the FDA approved the Medtronic 670G “hybrid” closed-loop system. In “Auto Mode,” this system automatically controls basal insulin delivery based on CGM data, but requires users to enter carbohydrate intake and blood sugar for boluses. Studies show improved time in range associated with the use of Auto Mode. In an effort to track our real-world experience with this first commercial closed-loop device, we followed pediatric and adult patients placed on the 670G. Methods: This was a 1-year prospective observational study, recruiting 5/2017-9/2018, of patients with type 1 diabetes, ≥7 years, starting the 670G system. Results: 84 patients started on the 670G (range 9-61 years), 26 (31%) were Conclusions: While use of closed-loop technology correlates with improved glycemic control, a focus on usability and human factors is necessary to ensure patients stay on treatment. Alarms and sensor calibration are a major patient concern, which next generation technology should alleviate. Disclosure R. Lal: Consultant; Self; Abbott. M. Basina: None. D.M. Maahs: Advisory Panel; Self; Novo Nordisk Inc. Consultant; Self; Abbott, Sanofi. Research Support; Self; Dexcom, Inc., Tandem Diabetes Care. B.A. Buckingham: Advisory Panel; Self; ConvaTec Inc., Novo Nordisk Inc., Profusa, Inc. Consultant; Self; Medtronic MiniMed, Inc. Research Support; Self; Beta Bionics, ConvaTec Inc., Dexcom, Inc., Insulet Corporation, Medtronic MiniMed, Inc., Tandem Diabetes Care. Other Relationship; Self; Insulet Corporation, Tandem Diabetes Care. K.K. Hood: Consultant; Self; Lilly Diabetes. Research Support; Self; Dexcom, Inc. Speaker9s Bureau; Self; Johnson & Johnson Diabetes Institute. B.P. Conrad: None. J. Leverenz: None. A. Chmielewski: None. K. Peterson: None. D. Wilson: Advisory Panel; Self; Tolerion, Inc. Research Support; Self; Beta Bionics, Dexcom, Inc., Medtronic. Funding National Institute of Diabetes and Digestive and Kidney Diseases (T32DK007217); Seiler Fund