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HelpOrder Code LAB1400 T4 (Thyroxine), Free, Serum
Additional Codes
|
Test Name in EPIC |
EPIC Test Code |
Mnemonic |
|
RV T4, FREE |
LAB1400 |
FT4 |
Useful For
Free T4 concentrations closely parallel thyroid dysfunction in patients with either hypo or hyperthyroidism than total thyroxine
Specimen Requirements
Centrifuge and remove the serum from cells within 4 hours of collection.
Specimen Type: Serum
Collection Container/Tube:
Preferred: SST
Acceptable: Plain, red-top tube
Specimen Volume: 2 mL
Pediatric (minimum) volume: 0.5 mL
Specimen Stability
| Specimen Type | Temperature | Stability |
| Serum | Ambient | 4 hours |
| Refrigerated (preferred) | 7 days | |
| Frozen | 4 weeks |
Reference Values
0.78 - 2.19 ng/dL
No pediatric range established
Day(s) Test Set Up
Monday through Sunday
Performing Laboratory
Ridgeview Medical Center Laboratory
Methodology
Competitive Immunoassay
Test Classification and CPT Coding
84439