Test Name
FREE T4
Aliases
FREE THYROXINE
Abbreviations
FT4
Test Classification
INDIVIDUAL
Department
SPECIAL CHEMISTRY
Sub Department
-
TAT Category
BUSINESS (WORKING) TIME
Estimated TAT
3
TAT Units
HOURS
Test Requirements
3ml of Serum in Gel or Plain Vacutainer.
SHIPPING/ TRANSPORTATION REQUIREMENTS
Shipping Temperature: Refrigerated
ANALYTE STABILITY
Room Temperature: 5 DAYS at 20-25°C │ Refrigerated: 7 DAYS at 2-8°C │ Frozen: 1 MONTH at -20°C
Clinical Utility
Screening and diagnosis of hypothyroidism and hyperthyroidism. Assessment of treatment response.
Last Review
26th Feb 2026