Study on How Fiasp® Can Influence Blood Sugar Levels of type1 Diabetic Patients in Their Daily Lives, With the Help of the Freestyle Libre® Device

Patients will be treated with commercially available fast-acting insulin aspart as bolus insulin (multiple daily injection \[MDI\]) or as insulin used in the insulin pumps (continuous subcutaneous insulin infusion \[CSII\]). Dosing of fast-acting insulin aspart is individual and determined by the treating physician in accordance with the needs of the patient.