The Closed-Loop System Improved the Control of a Pregnant Patient with Type 1 Diabetes Mellitus.

OBJECTIVE:Closed-loop insulin systems represent a technological advance in diabetes management but have rarely been studied in pregnancy. We report a case of a patient with type 1 diabetes mellitus who was previously a user of the Paradigm VEO pump and then migrated to Medtronic 670G. Research Design and Methods. We reviewed the case of a G1P0 patient with type 1 diabetes, treated with the Medtronic 670G system during pregnancy; a comparison with current literature was done. RESULTS:The patient achieved improved glycemic control as measured by time spent in different ranges as follows: <70 mg/dL, 8-4% and 70-180 mg/dL, 83-94%. Secondary outcomes included reduction of stress, anxiety, fear of hypoglycemia, and the psychological burden related to the disease. There were no obstetric or neonatal complications. CONCLUSION:The Medtronic 670G closed-loop system was used safely in a pregnant woman; nevertheless, further research is needed to validate this system in this patient population.