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HelpTest Code COR Cortisol, serum, Random
Specimen Requirements
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0mL
Minimum Volume: 0.5mL serum
Collection Instructions: Allow specimen to clot for 30 minutes and centrifuge within 2 hours
Sample Stability
** Preferred temperatures for storage prior to and during shipping to NUH **
| Specimen Type: | Serum |
|---|---|
| Ambient: | Send the sample to the laboratory immediately. |
| Refrigerate: | 14 days |
| Frozen: | 30 days |
Reference Interval
Serum cortisol is time dependent.
| Age | |
|---|---|
| 2 - 14 days | 13-340 nmol/L |
| 15 days - <1 yr | 14-458 nmol/L |
| 1yr - 8 yrs | 48-297 nmol/L |
| 9 - 13 yrs | 61-349 nmol/L |
| 14 - 16 yrs | 77-453 nmol/L |
| 17 - 18 yrs | 97-506 nmol/L |
Days and Times Performed
24 hours, TAT 1 day
Methodology
Chemiluminescent Immunoassay
Service Code
31721
Update
Last updated 16/05/2024
Updated on Methodology.
Unacceptable Condition
| Haemolysis | NA |
|---|---|
| Icterus | NA |
| Lipaemic | NA |
| Others | NA |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Differential diagnosis of Cushing syndrome. Screening and diagnosis of primary and secondary adrenal insufficiency.