MICHIGAN INNOVATIVE DIAGNOSTICS

Total circulating T3, used in thyroid function assessment.

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LIS TEST CODE: TT3

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CPT CODE: 84480

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ALIASES: TT3, Total T3, T3 Suppression, Thyroid Function Cascade

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METHODOLOGY: Chemiluminescent Microparticle Immunoassay (CMIA)

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SPECIMEN:

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- Type: Serum

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- Container: Gold Top (SST) Vacutainer

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- Minimum Volume Required: 1 mL

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- Storage/Handling: Allow 30 minutes for blood to clot, then centrifuge specimen at 3500 RPM for 10 minutes. Maintain specimen in the refrigerator until testing can be performed.

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- Stability:     

 

Room Temperature (20-25 °C): Not Accepted

Refrigerated (2-8 °C): 6 days

Frozen (-20 °C or colder): Not Accepted

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- Turnaround Time: 24 hours from receipt.

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Special Instructions: N/A

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REJECTION REASONS: QNS, Gross Hemolysis, Gross Lipemia, Contamination, Stability Violation, Expired Container, Incorrect Container

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REFERENCE RANGES:

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Males & Females (ng/mL)

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>= 1 years of age: 0.40 - 1.93

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