FT4
24 hours
ECLIA
Accredited NRL Laboratory
Daily
Measures free T4. More aurate for thyroid status than total T4.
Serum or Plasma
0.5 mL
Gel-barrier tube or Red-top tube or Green-top (Heparin) tube
No special preparation is required for this test. You may eat, drink, and take your medications as normal, unless instructed otherwise by your healthcare provider.
This test does not require any special collection or pre-analytical handling. Follow routine specimen collection protocols.
| Temperature | Period |
|---|---|
| Refrigerated | 7 days |