Free Testosterone

Department

Endocrinology Lab

Delphic Registration Code

TEST and SHBG

Constituent Tests

• Testosterone, Plasma / Serum
• Sex hormone binding globulin, Plasum (Plasma / Serum)

Synonyms

Free Testosterone

Turnaround Time

7 days

Specimen Type

• Serum
• Plasma

Specimen Requirements

Tube/Container Type:

Preferred

• SST II (Gold Cap)

Preferred if West Coast

• SST II (Gold Cap)

Acceptable

• Serum (Red Cap)
• SST II (Gold Cap)
• Lithium Heparin - Non-gel (Green Cap)
• Lithium Heparin - Gel (Light Green Cap)

Preferred Sample Volume (ml)

2

Paediatric Specimen Requirements

Tube/Container Type:

Preferred

• SST II (Gold Cap)

Acceptable

• Serum (Red Cap)
• SST II (Gold Cap)
• Lithium Heparin - Non-gel (Green Cap)
• Lithium Heparin - Gel (Light Green Cap)

Pre-testing Requirements

Due to diurnal variation, please collect a sample before 10am for male patients.

Aliquot Instructions

Transport to Lab

Ambient (8 - 24 degrees Celsius)

Additional Referral/Aliquot Information

2 x 500 uL plasma aliquots. Freeze/refrigerate

Test Method

ECLIA on Roch Cobas e402

Contact Canterbury Health Laboratories on +64 3 364 0484 or email LabInfo@cdhb.health.nz

Additional Costing Information

See Testosterone and Sex Hormone Binding Globulin for costing.

Free testosterone is calculated from the Testosterone and SHBG results.
Free testosterone is derived from Vermeulen et al JCEM; 84 3666, 1999.

Contact Information

Enquiry Form