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Test Code: COR24R Preferred Name Urine free cortisol - 24 Hour Urine

No
N/A
Twice weekly
1 week
Medicare Item
N/A

Test Tubes

ImageSpecimen TypeSpecimen VolumeTube Type
Urine (24 hour)24 hourUrine 24 hr container (no preservative)

COLLECTION NOTES

A 24 hour collection (no preservative) or occasionally a random urine is collected. For Random Urine Free Cortisol, refer to Cortisol Random urine Entry.

GENERAL NOTES



APPLICATION:  Diagnosis of adrenocortical hyperfunction, as an indicator of adrenocortical activity in the dexamethasone suppression test (long).

INTERPRETATION:  Increased excretion occurs with primary or secondary adrenocortical hyperfunction although increased levels may be seen in obesity, stress, depression and alcoholism.  The test is not used to evaluate adrenal hypofunction; the synacthen stimulation test is a more appropriate approach in this circumstance.

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