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HelpTest Code LAB1915 T4 Total
Aliases
TT4
T4T
Specimen Type
Serum:
Gold Top Tube-SST (Preferred)
Red Top Tube-Plain
Processing Instructions
Allow sample to clot in upright position for 30 minutes.
CENTRIFUGE sample per procedure.
Store and send sample refrigerated via courier.
Specimen Volume
Preferred: 1.5 mL
Minimum: 0.6 mL
Temperature
Refrigerated
Sample Stability
Refrigerated: 7 days
TAT
Routine: 120 minutes
STAT: 60 minutes
Test Components
Total T4
Reference Range
0 to 3 days: 8.000-20.000 mcg/dL
3 days to 31 days: 5.000-15.000 mcg/dL
31 days to 1 year: 6.000-14.000 mcg/dL
1 year to 6 years: 4.500-11.000 mcg/dL
6 years to 18 years: 4.500-10.000 mcg/dL
18 years and up: 5.530-11.000 mcg/dL
CPT
84436
Performing Section
Chemistry