A pediatric nurse is reviewing the plan of care for a child suspected of having an endocrine disorder. The healthcare provider orders blood lab work to evaluate the child's endocrine function. What is the primary purpose of performing this blood lab work?

A. While a CBC can identify infections, anemia, or other blood disorders, it does not directly assess endocrine function. In a child suspected of having an endocrine disorder, CBC is not the primary diagnostic tool. B. Electrolytes such as sodium, potassium, and calcium can be affected by endocrine disorders, but the purpose of this blood work is to directly evaluate hormone levels, not primarily to assess kidney function. Electrolytes may be part of a broader evaluation but are secondary. C. Liver function tests assess hepatic disease, which may contribute to some systemic symptoms, but they do not provide direct information about endocrine gland function. D. Blood lab work for endocrine evaluation directly measures hormones such as thyroid hormones, cortisol, growth hormone, insulin, and sex hormones. Abnormal hormone levels help diagnose endocrine disorders, determine which glands are affected, and guide treatment. This testing is central to understanding the child’s endocrine status and planning appropriate interventions.