Pediatric Type 1 Diabetes

Type 1 diabetes usually results from autoimmune destruction of pancreatic beta cells. The child therefore has an absolute insulin deficiency: glucose remains in the bloodstream but cannot enter insulin-dependent cells effectively for energy. The body responds as though it is starving despite high blood glucose. It breaks down fat and muscle, causing weight loss and producing ketones. At the same time, excess glucose pulls water into the urine. Polyuria, dehydration, thirst, fatigue, and blurred vision follow from that osmotic diuresis. Basal insulin restrains ketone production between meals and overnight. Prandial insulin manages the glucose rise from food. A child with type 1 diabetes needs continuous insulin replacement; omitting basal insulin can permit ketosis even when the child is not eating. Type 1 diabetes can occur at any body size. Obesity or acanthosis nigricans may suggest insulin resistance and type 2 diabetes, but neither finding excludes type 1 diabetes. In a child with weight loss, polyuria, thirst, and ketones, notify the physician or nurse practitioner immediately and obtain urgent medical assessment rather than assigning the diabetes type independently.