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Laboratory Test Detail

Last Updated: April 26, 2024 @ 9:13 am

2296

Free T3

Specimen:Collect:
  • One SST

Also Acceptable:
  • One Green Top (Li Heparin)
  • One Lavender (EDTA)
  • One Pink Top (EDTA)
  • One Red Top
Submit:
  • 1 mL (Min:0.5 mL) Serum . Submit Refrigerated. Submit in a Standard Transport Tube.

Also Acceptable:
  • 1 mL (Min:0.5 mL) Plasma . Submit Refrigerated. Submit in a Standard Transport Tube.
Special Handling:
  • Allow specimen to clot completely at room temperature
  • Avoid Repeated Freeze/Thaw Cycles
  • For patients receiving therapy with high biotin doses (>5 mg/day), no laboratory test specimen should be collected until at least 8 hours after the last biotin administration.
Stability:Ambient: 5 Day(s); Refrigerated: 7 Day(s); Frozen: 1 Month(s); Incubated: Unacceptable
Methodology:
  • Electrochemiluminescence Immunoassay (ECLIA)
Performed:Mon-Fri
Reported:1-3 Day(s)
CPT Codes:
  • 84481
Interpretive Data:
Male Reference Ranges
  • 0 - 3 week(s) : 2.0-5.2 pg/ml
  • 3 week(s) - 2 year(s) : 1.5-6.4 pg/ml
  • 2 - 7 year(s) : 2.0-6.0 pg/ml
  • 7 - 12 year(s) : 2.7-5.2 pg/ml
  • 12 - 19 year(s) : 2.3-5.0 pg/ml
  • 19 - 150 year(s) : 2.5-4.3 pg/ml

Female Reference Ranges
  • 0 - 3 week(s) : 2.0-5.2 pg/ml
  • 3 week(s) - 2 year(s) : 1.5-6.4 pg/ml
  • 2 - 7 year(s) : 2.0-6.0 pg/ml
  • 7 - 12 year(s) : 2.7-5.2 pg/ml
  • 12 - 19 year(s) : 2.3-5.0 pg/ml
  • 19 - 150 year(s) : 2.5-4.3 pg/ml


Biotin in specimens taken from patients on high-dose biotin therapy or supplements may intefere with this test and cause inaccurate test results. It is recommended that for patients receiving therapy with high biotin doses (> 5 mg/day), no laboratory test specimen should be collected until at least 8 hours after the last biotin administration.
Components:
  • 2296 - FREE T3
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