A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
T3 Free (Triiodothyroxine), Serum or Plasma
Test CodeT3Free - NCMC
Alias/See Also
T3Free
T3F
FT3
Free T3
T3F
FT3
Free T3
CPT Codes
84481
Preferred Specimen
1.0 mL serum from SST
Minimum Volume
0.5 mL
Note: For neonate requirements see Neonate Minimum Blood Volumes
Note: For neonate requirements see Neonate Minimum Blood Volumes
Other Acceptable Specimens
1 mL plasma from Green top (Lithium Heparin) or 1 ml serum from Red Top
Specimen Stability
Specimen Type | Temperature | Time |
Serum SST | Refrigerated | 7 days |
Red Top – Separated* | Refrigerated | 7 days |
Plasma Li Hep | Refrigerated | 7 days |
*Centrifuge and aliquot into a plastic vial.
Methodology
Homogenous, sequential, chemiluminescent immunoassay based on LOCI technology
Setup Schedule
Monday through Sunday; Continuously
Report Available
Same day
Reference Range
0-30 days: 2.7-8.5 pg/mL
30 days - 12 months: 3.4-5.6 pg/mL
12 months - 14 years: 3.0-5.1 pg/mL
14 years - 19 years: 3.3-5.3 pg/mL
19 years - 150 years: 2.0-4.4 pg/mL
30 days - 12 months: 3.4-5.6 pg/mL
12 months - 14 years: 3.0-5.1 pg/mL
14 years - 19 years: 3.3-5.3 pg/mL
19 years - 150 years: 2.0-4.4 pg/mL
Performing Laboratory
North Colorado Medical Center Laboratory