Cortisol, Free, Total With CBG (Endocrine Sciences)
Use
This test measures total cortisol, cortisol‑binding globulin (CBG), free cortisol, and percent free cortisol—providing a comprehensive assessment of cortisol status including binding protein and free fraction which can be vital in evaluating adrenal disorders such as Cushing’s syndrome or adrenal insufficiency.
Special Instructions
Separate serum within one hour of venipuncture; transfer specimen to plastic transport tube before freezing. To avoid TAT delays when requesting multiple tests on frozen samples, submit separate frozen specimens for each test requested.
Limitations
Not provided.
Methodology
Mass Spectrometry
Biomarkers
LOINC Codes
- 68315-1
- 3033-8
- 2143-6
- 2145-1
- 65364-2
Result Turnaround Time
6-12 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL
Minimum Volume
0.3 mL
Container
Red-top tube or gel-barrier tube
Collection Instructions
Separate serum within one hour of venipuncture. Transfer specimen to a plastic transport tube before freezing.
Storage Instructions
Freeze. Stable at room temperature for one day or refrigerated for one day. Stable for one year frozen.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 1 day |
| Refrigerated | 1 day |
| Frozen | 1 year |