Specimen Requirements

Title

CORTISOL, FREE, URINE

Specimen Requirement

24-hour urine collection required. Refrigerate during collection. Mix well and send 2.0 mL minimum aliquot refrigerated in a screw-capped plastic urine container.

Record total volume on request form and sample label.

Methodology

Stability

Refrigerated 7 days; Frozen 14 days

Reference Range

By Report*

Turnaround

1-4 days Performed Tues, Fri

Clinical Use

Assess adrenal function; particularly useful in the diagnosis of Cushing syndrome. Recent data suggest that urinary free cortisol concentrations can be significantly altered in patients taking inhaled corticosteroids

Test Code

UFCPW