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Test Compendium

Test Name

  • TESTOSTERONE, TOTAL AND FREE(FTI)

Test Code

  • 7801

Test Synonym

  • FREE AND TOTAL TESTOSTERONE, TOTAL AND FREE TESTOSTERONE

Minimum Volume

  • 0.5 mL

Specimen Type

  • Serum

Primary Container

  • Serum Separator Tube, Plain Red Top Tube, Transfer Tube- Serum

Transport Temp

  • Refrigerated

TAT

  • 1 day

Specimen Requirements

  • 1 SST

Specimen Retention

  • This test includes Total Testosterone and Sex Hormone Binding Globulin (SHBG). The Free Testosterone Index (FTI) or Free Androgen Index is derived from a mathematical calculation using the Testosterone, Total expressed as nmol/L and the Sex Hormone Binding Globulin (SHBG). It is a rough guide to free testosterone levels, this test has limitations as a measurement and may be more useful in women.