| Synonyms:
| T4, Total T4 |
| Specimen: | Blood; (1) SST (serum separator) or Red (no preservative) top vacutainer tube |
| Volume: | Full Primary tube |
| Minimum Volume: | |
| 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: | Citrated plasma; improper labeling. |
| Reference Range: | |
| Methodology: | |
| Test Use: | |
| Additional Information: | |
| Testing Includes: | |
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