[New Developments in Type 1 Diabetes]

With the increasing prevalence of continuous glucose monitoring (CGM) systems, time in range (TIR) is gaining importance as a parameter for optimization of glycemic control in patients with type 1 diabetes mellitus. Recent studies showed improved prevention of cardiovascular events and pregnancy complications in patients with optimized TIR. In addition to TIR, it is recommended to consider Time below Range (TBR) as well to include an assessment of hypoglycemia.

Hypoglycemia remains a clinically relevant complication of therapy for type 1 diabetes mellitus. With the approval of nasal glucagon, there is now an alternative to traditional injections as an easy-to-use emergency therapy. With the development of the glucagon analogue Dasiglucagon, which is stable in the liquid state, a classic emergency pen with a ready-to-use solution will also potentially be available in the near future.

The new fast-acting insulin aspart (FIASP) offers new opportunities for blood glucose optimization in type 1 diabetes patients. Furthermore, the first hybrid closed-loop system for the treatment of type 1 diabetes mellitus was approved in Germany in 2019. This system automatically adjusts the basal rate based to blood glucose levels measured by CGM. When used adequately, a hybrid closed-loop system allows for improved glycemic control, particularly of nocturnal blood glucose.

Since 2019, the SGLT-2 inhibitor dapagliflozin and the combined SGLT-1/2 inhibitor sotagliflozin have been approved for the therapy of inadequately controlled type 1 diabetics with a BMI above 27 kg/m² and no elevated risk of diabetic ketoacidosis. The most relevant side effect is atypical normoglycemic ketoacidosis, which is why initial risk assessment and adequate training of the patient to perform and interpret ketone body and pH measurements during therapy are of central importance.