Testosterone, Free, Direct With Total Testosterone, LC/MS-MS
Use
Evaluate hirsutism and masculinization in women; evaluate testicular function in clinical states in which testosterone-binding proteins may be altered (obesity, cirrhosis, thyroid disorders)
Special Instructions
State patient's age and sex on the test request form.
Limitations
This test was developed and its performance characteristics determined by Labcorp. It has not been cleared or approved by the Food and Drug Administration.
Methodology
Other
Biomarkers
LOINC Codes
- 58952-3
- 2986-8
- 2991-8
Result Turnaround Time
4-6 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
2 mL
Minimum Volume
1.3 mL
Container
Red-top tube or gel-barrier tube
Collection Instructions
Serum should be transferred from cells within one hour of collection and transferred to a plastic transport tube.
Storage Instructions
Room temperature
Causes for Rejection
Gross lipemia (may yield erroneously high free testosterone results); plasma specimen; gross hemolysis and/or gross icterus cause for rejection of direct free testosterone; improper labeling
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 14 days |
| Refrigerated | 14 days |
| Frozen | 14 days |