Sign in →

Test Code LAB4199 T4, TOTAL (THYROXINE)

Specimen Type

Preferred Sample: Lithium Heparin Plasma (Green/Mint Top)
Alternative Sample: Serum (SST, Gold, Corvac, Tiger, Red Top NO GEL)

 

Specimen Volume

1 mL

Minimum Volume

0.5 mL

Microtainer 0.2 mL

Turnaround Time

STAT: 1 hour
Routine: 4 hours

Sample Stability

Refrigerated: 6 days
 

Method

Chemiluminescent microparticle immunoassay (CMIA)

Reference Ranges

Age Female Male
< 7 days None None
7 days to 1 year 5.87-13.7 ug/dL 5.87-13.7 ug/dL
1 year to 9 years 6.16-10.3 ug/dL 6.16-10.3 ug/dL
9 years to 12 years 5.48-9.31 ug/dL 5.48-9.31 ug/dL
12 years to 14 years 5.08-8.34 ug/dL 5.01-8.28 ug/dL
14 years to 19 years 5.46-13.00 ug/dL 4.68-8.62 ug/dL
>19 years 4.87-11.72 ug/dL 4.87-11.72 ug/dL

           

Reporting Limit

Measuring and reporting range: 3.0-24.0 micro grams/dL

Synonyms

THYROXINE, THYROID, TETRAIODOTHYRONINE, TETRA-IODOTHYRONINE, HORMONE, T4, LAB4199

CPT Code

84436