40220:THYROID STIMULATING HORMONE (TSH), FREE T4 PANEL

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40220:THYROID STIMULATING HORMONE (TSH), FREE T4 PANEL
Methodology: Chemiluminescent Immunoassay (CL)
Edit Date: 4/21/2009
Components: Free Thyroxine (FT4) / Thyroid Stimulating Hormone (TSH)
Performed: Daily
Released: Same day
CPT Code: 84439 / 84443
Specimen Collection Details
Collection: One 7.5 mL serum separator tube (SST). Also acceptable: One 5 mL red top tube or one 4 mL green top tube (heparin).
Handling: Centrifuge SST and transport in original tube. Specimens drawn in green top tube must be centrifuged and the plasma separated into a plastic vial for transport. Refrigerate. Freeze if specimen cannot be assayed within 7 days. Allow no more than one freeze/thaw cycle.
Stability: 8 hours ambient, 7 days refrigerated, or 1 month frozen.
Standard Volume: 0.5 mL serum or plasma.
Minimum Volume: 0.4 mL serum or plasma.
Transport: Refrigerated; or frozen on dry ice.
Rejection Criteria: Specimens frozen and thawed more than once; lavender top tube (EDTA).

Reference Range:
Please note new reference range based on in-house reference range study.
Male/Female ages 1 year to adult. 0.61-1.27 ng/dL