Establish the diagnosis of adrenocortical insufficiency, Addison's disease, adrenocortical hypersecretion, Cushing's syndrome. Malfunction of the organs in the hypothalamic-pituitary …

It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours …

Elevated serum osmolality with normal sodium suggests possible hyperglycemia, uremia, or alcoholism. 1 Low serum osmolality may be secondary to overhydration, hyponatremia, …

Special Instructions State collection time and date. This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin …

High-pressure liquid chromatography (HPLC) tandem mass spectrometry.

Urinary cortisol reflects the portion of serum-free cortisol filtered by the kidney, and correlates well with cortisol secretion rate. The most common causes of CS are pituitary adenoma (65% to …

Collect aliquot of a well-mixed 24-hour urine. Add boric acid (0.5 gm/100 mL) as preservative. Indicate 24-hour volume. Store refrigerated or frozen. Ship frozen on dry ice or refrigerated …

Special Instructions: If the patient’s hematocrit exceeds 55%, the volume of citrate in the collection tube must be adjusted. Refer to Coagulation Collection Procedures for directions.

Please review the frequently asked questions below. Not a patient? Visit Health Care Provider Help. I need information about sample collection for a test being ordered for a patient. Still …

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