Thyroid Cascade Reflex

Test Code: TD_2832

CPT Code(s): 84443

$24

Test Details

Alternative Name(s)

N/A

Test Includes

Thyroid Cascade.
Will reflex to Free T4 and TPO when result is above normal
Will reflex to Free T4 and Free T3 when result is below normal. Additional charges will apply

Methodology

Roche COBAS Electrochemiluminescent Immunoassay (ECLIA) this method has been standardized against the 2nd irp WHO reference standard 80/558.

Rejection Criteria

Gross hemolysis

Reference Range(s)

>=18 Years: 0.400-4.100 UIU/ML

Specimen Requirements

Preferred Specimen

Serum Separator Tube

Minimum Volume

0.75 mL serum

Sample Stability

8 days room temperature
2 weeks refrigerated
2 years frozen. Allow only one freeze/thaw cycle

Transport Temperature

Refrigerated

Collection Instructions

Allow SST to clot in an upright position for
at least 30 minutes, then centrifuge sample within 2 hours
of collection. Refrigerate.

Alternative Specimen

2 mL serum from a plain red top tube. Allow sample to clot in an upright position for at least 60 minutes, then centrifuge sample and transfer serum to a plastic transport tube within 2 hours of collection. Clearly label tube as serum from a plain red top tube.