Casandra
Casandra Test Code QD58604Version 1 (DRAFT)
Performing Lab
Testosterone, Free (Dialysis) and Total, MS
Also known as: F Testo, Free & Total Testosterone, LC/MS/MS, Testosterone Index, Testosterone
Clinical Use
Order TestUse
This assay is helpful in assessing testicular function in prepubescent hypogonadal males and in managing hirsutism and virilization in females.
Special Instructions
Not provided.
Limitations
Not provided.
Test Details
New York Approved
Methodology
Mass Spectrometry
Biomarkers
Testosterone, Free
AnalyteTestosterone, Free • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Testosterone, Total
AnalyteTestosterone, Total • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
Result Turnaround Time
5 days
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Serum
Volume
1.8 mL preferred; 0.9 mL minimum
Minimum Volume
Not provided
Container
Red‑top tube (no gel) or serum separator tube; plasma acceptable in sodium or lithium heparin (green‑top) tube
Collection Instructions
Allow blood to clot at room temperature; centrifuge and pour serum into a plastic transport tube; if SST, remove serum from gel immediately (not to exceed 48 hours)
Causes for Rejection
Gross hemolysis • Grossly lipemic
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 7 days |
| Refrigerated | 21 days |
| Frozen | 2 years |