Pathology Handbook

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Thyroid Function Tests

Laboratory:

Clinical Biochemistry

Test Code:

TFT

Specimen Types:

Blood

Container Types:

SST
Lithium Heparin (with Gel)

Adults Volume or Mass:

5 mL

Minimum/Paediatric Volume or Mass:

2 mL

Collection & Request Instructions:

It is suggested that only TSH is requested. If this is abnormal, FT4 and/or FT3 will be perfomed, as appropriate.

Clinical notes are essential for interpretive comments—especially a record of therapy with thyroxine or anti–thyroid drugs, suspicion of pituitary disease, drug therapy with amiodarone, lithium, phenytoin, etc.—which will permit additional tests as required.

Transport Instructions between Sites and/or Laboratories:

Room Temperature

Assay Frequency:

24/7

MBS Rebatable:

Yes

MBS Item No.:

66716

Billing Information:

Also MBS Item No 66719

Additional Notes:

Reference Intervals: See individual tests.