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HelpTest ID BLOD0595 Total T4
AKA
Thyroxine
Specimen Type/Requirements
Gold top (Serum w/gel) tube - Serum
Red top (Serum w/out gel) tube - Serum
Light Green top (Lithium Heparin w/gel) tube - Plasma
Specimen should be centrifuged and separated within 2 hours of collection.
Test is affected by moderate hemolysis and gross lipemia.
Specimen Volume
| Preferred Volume | 1.0 mL |
|---|---|
| Minimum Volume | 0.5 mL |
Stability/Transport
| Room Temperature | Not Acceptable | |
|---|---|---|
| Refrigerated | 6 days | Preferred for transport |
| Frozen | Greater than 6 days |
Performed Test Frequency
Monday through Sunday
Methodology
Chemiluminescence
CPT
84436
Performing Lab
Sanford Laboratories Sioux Falls