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HelpTest Code 24COR Cortisol Free, urine, 24 hr
Laboratory Code
LAB382
Specimen Requirements
Specimen Type: 24 hr urine
Container/Tube: Collect 24 hr urine in 24 hrs urine container without preservatives.
Volume: 4000.0 mL
Minimum Volume: 20.0 mL
Collection Instructions: 24 hrs urine container must be used. Mix well before taking aliquot.
Please refer to NUH's Urine Preservative Guide
Specimen Stability
| Specimen Type | Urine |
|---|---|
| Ambient | Not available |
| Refrigerate | 14 days |
| Frozen | 30 days |
Methodology
Chemiluminescent Immunoassay
Days and Times Performed
24 hrs, TAT 1 day
Specimen Condition
| Haemolysis | Not applicable |
|---|---|
| Icterus | Not applicable |
| Lipaemia | Not applicable |
| Others | Not applicable |
Reference Interval
12 – 486 nmol/day
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Screening test for Cushing syndrome.
Service Code
31868
LOINC Code Information
| Urine volume, total | 3167-4 |
|---|---|
| Cortisol free, urine | 15043-3 |
| Cortisol free, urine, 24 hr | 32310-5 |
Alias
24 hours urine
Cortisol, Free
Update
Last updated 18/03/2025