A patient with syndrome of inappropriate antidiuretic hormone (SIADH)is experiencing a headache and confusion.Which laboratory test would best explain the reason for this patient's symptoms?

Question

Quizplus · Accepted Answer

Patients with SIADH have excessive ADH secretion, which results in water retention and dilutional hyponatremia. Therefore, measuring the serum sodium level would be the best laboratory test to understand the patient's symptoms of headache and confusion, which can be associated with hyponatremia.

A Patient with Syndrome of Inappropriate Antidiuretic Hormone (SIADH)is Experiencing