Specimen Requirements
Title
Testosterone, Free, Bioavailable and Total
Specimen Requirement
Includes: Testosterone, Total, Testosterone Free – Calculated; Testosterone, Bioavailable – Calculated, Sex Hormone Binding Globulin; Albumin.
Collect red top, promptly centrifuge, transfer 2.8 mL serum to a screw top transport tube, indicate sample type on tube and send.
Methodology
Liquid Chromatography Tandem Mass Spectrometry, Calculation, Spectrophotometry, Immunochemiluminescent Assay
Stability
Room temp: 7 days, Refrigerated: 7 days, Frozen: 28 days
Reference Range
By Report*
Turnaround
4-6 days
Clinical Use
Helpful in assessing testicular function in males and managing hirsutism, virilization in females.
Test Code
TFBTW