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Testosterone, Free (Dialysis) and Total, MS
Test Code36170
CPT Codes
84402, 84403
Includes
Testosterone, Total, MS and Testosterone, Free (Dialysis)
Preferred Specimen
1.8 mL serum
Minimum Volume
0.9 mL
Other Acceptable Specimens
Plasma collected in: Sodium heparin (green-top) or lithium heparin (green-top) tube
Instructions
Specify age and sex on test request form.
Red-top tube (no gel): Allow blood to clot at room temperature. Centrifuge to separate the serum from the cells and immediately pour serum into a plastic transport tube.
Serum separator tube: Allow blood to clot at room temperature, centrifuge, and remove serum from the gel immediately (not to exceed 48 hours) by pouring serum into a plastic transport tube.
Transport Container
Plastic transport tube
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 21 days
Frozen: 2 years
Refrigerated: 21 days
Frozen: 2 years
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Grossly lipemic
Methodology
Chromatography/Mass Spectrometry • Equilibrium Dialysis • Calculation (CALC)
FDA Status
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.
Setup Schedule
Set up: Daily; Report available: 4 days
Reference Range
See Laboratory Report
Clinical Significance
Helpful in assessing testicular function in prepubescent hypogonadal males and in managing hirsutism, virilization in females.
Performing Laboratory
Quest Diagnostics Nichols Institute |
14225 Newbrook Drive |
Chantilly, VA 20153 |