Chapter 31: Metabolic & Endocrine Conditions in Children

Metabolic & Endocrine Conditions in Children details critical inborn errors of metabolism such as Tay-Sachs disease, an autosomal recessive disorder caused by an enzyme deficiency that leads to progressive neurological deterioration, as well as hypothyroidism, which requires early detection and lifelong levothyroxine replacement to prevent intellectual disability and physical delays. A significant portion of the text is dedicated to pituitary disorders like diabetes insipidus, where a deficiency of antidiuretic hormone (vasopressin) results in uncontrolled diuresis, necessitating desmopressin therapy and careful fluid management to prevent dehydration or water intoxication. The primary focus of the chapter is Diabetes Mellitus (DM), distinguishing between the autoimmune destruction of beta cells in Type 1 diabetes and the insulin resistance associated with obesity and acanthosis nigricans in Type 2 diabetes. The summary covers the pathophysiology of hyperglycemia and classic symptoms including polydipsia, polyuria, and polyphagia, alongside diagnostic standards like fasting blood glucose and the glycosylated hemoglobin (HgbA1c) test for assessing long-term glycemic control. Critical acute complications are analyzed, specifically diabetic ketoacidosis (DKA) characterized by metabolic acidosis and fruity breath, and hypoglycemia (insulin shock) caused by insulin excess or exercise, as well as the Somogyi and dawn phenomena which create glucose instability. The text provides in-depth guidelines on therapeutic management, including the pharmacokinetics of various insulin types (rapid, short, intermediate, and long-acting), the use of technology like insulin pumps and closed-loop systems, and the importance of site rotation to avoid lipoatrophy. Finally, it addresses the holistic nursing care required for the child and family, emphasizing nutritional strategies like carbohydrate counting and the glycemic index, safety precautions during exercise, and the developmental challenges of managing a chronic condition through puberty and adolescence.