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Blood Sciences

Blood Test Information

Free T4
(a.k.a FT4)
minimum sample volume required ~ 5ml

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Tube type: SST

Reference range
12-22

Units
pmol/L

Turnaround Time
2 days

Department: Biochemistry

Clinical Application
For the diagnosis and management of thyroid disease. FT4 analysis is automatically added by the laboratory when the TSH is above the reference range in patients not on thyroxine and when clinical details indicate FT4 analysis is appropriate e.g. hypopituitarism or pregnancy. .....................................................................................................................................................................


Test limitations: On rare occasions, this immunoassay may be subject to interference e.g. due to patient-specific endogenous anti-reagent antibodies. Please contact the duty biochemist if you wish to discuss any results that do not appear to be consistent with the clinical picture (01225 824 715/713/711).

 
 

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