Random Urine, Cortisol Free

Synonyms

• CORTISOL FREE, RANDOM URINE
• CORTRU
• LAB11679

Cerner Name

Cortisol Free, Random Urine

Clinical Info

Investigating suspected Cushing syndrome (hypercortisolism), when a 24-hour collection is prohibitive (ie, pediatric patients).
Assisting in diagnosing acquired or inherited abnormalities of 11-beta-hydroxy steroid dehydrogenase (cortisol to cortisone ratio)
Diagnosis of pseudohyperaldosteronism due to excessive licorice consumption
This test has limited usefulness in the evaluation of adrenal insufficiency.
This test is not useful for evaluation of hypocorticalism.

Specimen Sources

Bladder Kidney, Left Kidney, Right Ureter, Left Ureter, Right Urine, Catheter Urine, Clean Catch Urine, Foley Urine, Voided

Specimen Types

Urine

Specimen Volume

5 mL Random Urine ( 3 mL min)

Container

Urine-Yellow Top

Collection Instructions

Container/Tube: Plastic, 10-mL urine tube
Specimen : 5 mL Random Urine ( 3 mL min)
Transport Temperature: Refrigerated
Stability: 7 Days Room Temperature
14 Days Refrigerated
28 Days Frozen
Frozen (preferred)
28 days

Refrigerated
14 days

Ambient
7 days

Transport Instructions

Refrigerated

Specimen Stability

7 Days Room Temperature
14 Days Refrigerated
28 Days Frozen
Frozen (preferred)
28 days

Refrigerated
14 days

Ambient
7 days

Methodology

RCTU: Enzymatic Colorimetric Assay

CRAN: Liquid Chromatography-Tandem Mass Spectrometry
(LC-MS/MS)

Days Performed

Monday through Friday; 4 p.m.

Performing Laboratories

Mayo Medical Laboratories

CPT

82530
LOINC Code 44309-3

PDM

5589039

Results

Result Interpretation

Forms