Casandra
Casandra Test Code QD87928Version 1 (DRAFT)
Performing Lab
Cortisol, Free, 24‑Hour Urine with Creatinine
Clinical Use
Order TestUse
Urinary 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
Reference ranges do not apply to random urine samples.
Test Details
Methodology
Mass Spectrometry
Biomarkers
Cortisol, Free
AnalyteCortisol, Free • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Creatinine
AnalyteCreatinine • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Result Turnaround Time
3-7 days
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Urine
Volume
2 mL
Minimum Volume
0.5 mL
Container
Plastic urine container
Collection Instructions
Collect 2 mL urine from a 24‑hour collection (no preservatives); acceptable with 10 g boric acid, 10 mL concentrated glacial acetic acid, or 25 mL 6N HCl. Record 24‑hour urine volume on test requisition and urine vial.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 14 days |
| Refrigerated | 21 days |
| Frozen | 90 days |