Laboratory Services
Testosterone, Total and Free, Serum
Print this pageUpdated Test Information:
| Test Description |
Testosterone, Total and Free, Serum
|
|
|---|---|---|
| Synonym(s) |
Testosterone, Testosterone Free by Calculation, UOW1044 |
|
| Test ID |
FTTEST
|
|
| General Information |
Do not order for patients <18 years. |
|
| Container Type |
Lithium Heparin (Lime Green) Top PST & Red Top |
|
| Specimen Type |
Serum |
|
| Specimen Requirements |
For albumin and SHBG: 4 mL blood in Lithium Heparin (Lime Green) TOP PST tubeFor testosterone by LC-MS/MS: 4 mL blood in RED TOP |
|
| Alternate Specimen Type |
For albumin and SHBG: 4 mL blood in GOLD TOP SST, RED TOP, ORANGE TOP SSTFor testosterone by LC-MS/MS: 4 mL blood in LAVENDER TOP |
|
| Specimen Collection / Processing Instructions |
Red Top and Lavender Top Processing: Centrifuge and aliquot serum or plasma to a plastic vial within 24 hours of collection. |
|
| Minimum Sample Volume |
requested: 1 mL serum/plasma |
|
| Stability |
Refrigerated |
|
| Methodology |
Chemiluminescence, Beckman DxI instrument (SHBG), dye-binding and spectrophotometry (albumin), and LC-MS/MS (testosterone) |
|
| Testing Schedule |
Daily |
|
| Test Includes |
Sex Hormone Binding Globulin - SHBG |
|
| CPT Code(s) |
84270, 84403 |
|
| Performing Lab |
UW Laboratory |
|
| LOINC Code(s) |
