Type 1 Diabetes in Children

A 5-year-old presents with bedwetting after being fully toilet-trained, fruity breath, and weight loss despite eating more. The classic triad is already pointing toward diabetic ketoacidosis — and you need to act before it gets there.

Type 1 diabetes in children results from autoimmune destruction of pancreatic beta cells, producing absolute insulin deficiency. Unlike type 2, it is not related to obesity or lifestyle. The classic presentation is the three Ps: polyuria, polydipsia, and polyphagia — often accompanied by unexplained weight loss. In young children, new-onset bedwetting (secondary enuresis) is a critical early clue. Many children present at diagnosis already in diabetic ketoacidosis (DKA): blood glucose >300 mg/dL, pH <7.30, serum bicarbonate <15 mEq/L, ketonuria, and Kussmaul respirations (deep, rapid breathing to blow off CO2). DKA management priorities are IV fluid resuscitation first, then continuous low-dose insulin drip — never a bolus push of insulin, which risks fatal cerebral edema in children. Monitor potassium closely: insulin drives K+ intracellularly, so replacement is started once K+ drops below 5.5 mEq/L and urine output is confirmed. Long-term management requires insulin (basal-bolus or pump), blood glucose monitoring, carbohydrate counting, and age-appropriate education. Hypoglycemia is the most common acute complication of treatment — the rule of 15 applies: 15 g fast-acting carbs, recheck in 15 minutes.

Key Distinctions

Don't confuse DKA (type 1, ketones, Kussmaul breathing, fruity breath) with hyperosmolar hyperglycemic state (type 2, no ketones, extreme dehydration). Students assume insulin is given as a bolus in DKA — in pediatrics, bolus insulin risks cerebral edema; always a continuous drip. Honeymoon phase after diagnosis (temporary reduced insulin needs) does not mean the disease is resolving — beta cell destruction continues.

Clinical Pearl

Fruity breath, fast breathing, and a formerly dry child now wetting the bed — think DKA until proven otherwise. Fluid first, drip insulin second, watch the potassium.