Test Code T3F FREE T3
Additional Codes
T3F.1
N.FREET3
Methodology
Automated Chemistry Analyzer
Specimen Requirements
Specimen Type: Serum or Plasma
Container/Tube: SST or Lithium Heparin
Specimen Volume: 1 mL (minimum 0.5)
Collection Instructions:
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Allow specimen to clot completely if a serum tube (SST) was used.
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Separate serum (SST) or plasma (Lithium Heparin) from cells within 24 hours and transport refrigerated. If red top tube is collected, separate serum from cells within 2 hours and place in separate plastic tube.
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Properly label tube with patient's name, DOB, requisition number and type of tube, i.e. LiHep or NaHep etc.
Specimen Transport/Stability
Refrigerated: 24 hours on gel, 6 days poured off
Maximum Laboratory Time
24 to 48 hours
Reference Ranges
Free T3 | pg/mL |
Newborn | Reference Range Not Available |
18 yrs | 1.58 - 3.91 |
Day(s) Test Set Up
Daily
Test Classification and CPT Coding
84481