Cortisol, Free, LC/MS, Serum
Use
Free cortisol is useful in the detection of patients with Cushing's syndrome for whom free cortisol concentrations are elevated.
Special Instructions
Not provided.
Limitations
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Methodology
Other
Biomarkers
Result Turnaround Time
3-7 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
2 mL (preferred)
Minimum Volume
0.7 mL
Container
red-top tube (no gel)
Collection Instructions
Plain red or lavender (EDTA) tube; centrifuge plain red or lavender and aliquot serum or plasma into a standard transport tube.
Storage Instructions
Refrigerated (cold packs) during transport
Causes for Rejection
Gross hemolysis; Received room temperature; Serum separator tube (SST)
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 48 hours |
| Refrigerated | 7 days |
| Frozen | 2 years |