Impact of Insulin Injection and Infusion Routines on Lipohypertrophy and Glycemic Control in Children and Adults with Diabetes

INTRODUCTION: Proper insulin injection/infusion is essential to optimize insulin absorption and action. Guidelines on insulin injection techniques are available. Lipohypertrophy (LH) is a local complication of insulin therapy, which results in erratic absorption and impaired glycemic control. METHODS: Children and adults with type 1 diabetes on insulin injection or infusion were enrolled in the study. Subjects were interviewed and filled in a questionnaire on injection/infusion routines. Sites of injection/infusion were examined by trained diabetes educators, and capillary HbA1c was obtained. RESULTS: One hundred sixty-nine subjects (104 children) with type 1 diabetes were enrolled; 119 were on multiple daily injection (MDI) and 50 on insulin pump therapy. Seventy-two percent and 82% of children and adults, respectively, rotate site at every injection; 78% of pump users change infusion set and 74% rotate site at 2–3 days. Thirty-nine percent and 32% of children and adults had LH. HbA1c was lower in children and adults with no LH (P < 0.001). An association was seen between LH and rotation frequency in children (P = 0.026). LH was the most common skin complication in the MDI group, while nodules, allergy marks and hyperpigmentation were seen in pump users. CONCLUSION: Proper injection/infusion routines impact glycemic control and skin health. Education and examination of injection sites remain a crucial part of diabetes management.