Test Information:
Free ThyroxineFT4 is a useful tool in clinical routine diagnostics for the assessment of the thyroid function. It should be measured together with TSH if thyroid disorders are suspected and is also suitable for monitoring treatment of secondary hypothyroidism (due to pituitary or hypothalamic disease) and of hyperthyroidism.
Specimen Container:
Gold Top SST Tube (with clot activator) or Red Top Tube (Plain) – USE PLASTIC TUBE
Specimen Type:
Serum
Required Volume:
2 mL
Patient Preparation:
No Patient Preparation
Notes:
N/A (Not Applicable)
Storage & Stability
(Before Processing)
- Storage: 2 to 8˚C
Stability: 7 days - Storage: 20 to 25˚C
Stability: 5 days - Storage: – 20˚C
Stability: 1 month
FREEZE ONLY ONCE!
Transport Temperature:
Ref (2˚C – 8˚C)
Test Category:
Routine
Test Schedule:
Daily
Results Availability:
Within 4 hours