Thyroxine (Total T4)

Department

Endocrinology Lab

Delphic Registration Code

T4

Synonyms

T4 Total
TT4

Turnaround Time

14 days

Test Code

8866

Specimen Type

• Serum
• Plasma

Specimen Requirements

Tube/Container Type:

Preferred

• Serum (Red Cap)

Acceptable

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

Preferred Sample Volume (ml)

5.0

No of Samples Required

1

Paediatric Specimen Requirements

Tube/Container Type:

Preferred

• Serum (Red Cap)

Acceptable

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

Preferred Sample Volume (ml)

1.0

Aliquot Instructions

Sample Type

• Serum
• Plasma

Minimum Volume (ml)

1.0

Transport to Lab

Frozen

Additional Referral/Aliquot Information

Minimum 1.0 ml serum, ideally 1.5 ml serum. This volume allows all total thyroid funtion tests to be performed. Fridge 4C.
Transport to CHL separated serum frozen

Reference Intervals

78 – 157 nmol/L (manufacturers data)

Test Method

Beckman-Coulter Access Analyser - CMIA

Non-Funded Test Cost

$30.7 (Exclusive of GST)

Billing Code

8866

EDTA not acceptable.

Automated method with different reference range introduced 22 August 2014.

Contact Information

Enquiry Form