It is important that timed tests are collected at the precisely specified intervals (such as tolerance tests, cortisol, and therapy monitoring). No food, liquid, chewing gum or other objects should be in the patient's mouth at the time the specimen is collected. Patients with a history of ...
cortisol levels <1.8 μg/dL predict absence of Cushing syndrome.22Values ≥1.8 μg/dL may be predictive of Cushing syndrome; the higher the value the less likely the elevation has another etiology, especially when both elevated cortisol (test code 6921) and dexamethasone (test code 29391) are...