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HelpTest ID BLOD0596 Free T4
AKA
FT4
Specimen Type/Requirements
Gold top (Serum w/gel) tube - Serum (preferred)
Red top (Serum w/out gel) tube - Serum (preferred)
Light Green top (Lithium Heparin w/gel) tube - Plasma
Note: If testing will be delayed more than 24 hours, remove serum or plasma from the clot, red blood cells, or separator gel.
Test is affected by gross hemolysis and gross lipemia.
Specimen Volume
| Preferred Volume | 1.0 mL |
|---|---|
| Minimum Volume | 0.3 mL |
Stability/Transport
| Room Temperature | 8 hours | |
|---|---|---|
| Refrigerated | 6 days | Preferred for transport |
| Frozen | Greater than 6 days |
Performed Test Frequency
Monday through Sunday
Methodology
Sioux Falls – Chemiluminescence
Rapid City – Electrochemiluminescence Immunoassay (ECLIA)
Performing Lab
Sanford Laboratories Sioux Falls
Sanford Laboratories Rapid City
CPT
84439