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Thyroid Function Tests

Laboratory:Clinical Biochemistry
Test Code:TFT
Specimen Types:Serum
Plasma
Container Types:
SST
Lithium Heparin (with Gel)
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
Additional Notes:

Reference Ranges: See individual tests.