| Synonyms:
| Free T4, Free Thyroxine |
| Specimen: | Blood: (1) SST (serum separator) or Red (no preservative) top vacutainer tube. |
| Volume: | Full primary tube |
| Minimum Volume: | 200 microL serum |
| Collection: | If tube other than an SST is collected, transfer serum to a tightly capped plastic aliquot tube within 2 hours of collection for transport.
Refrigerate at 2-8°C for 7 days.
|
| Rejection Criteria: | Plasma sample; improper labeling. |
| Reference Range: | 0.8-1.8 ng/dL |
| Methodology: | Direct chemiluminescent |
| Test Use: | |
| Additional Information: | No Additional Information Listed |
| Testing Includes: | |
| Testing Facility: | AnMed Laboratory |