T3 (Triiodothyronine), Free (Beckman)
General Information
Lab Name
T3 (Triiodothyronine), Free (Beckman)
Lab Code
T3FR
Description
This test has been replaced by [[TR3FG]]
Synonyms
Free T3, Free Triiodothyronine, FT3, thyroid function
Interpretation
Method
Chemiluminescence
Reference Range
Units: pg/mL| Female | Male | Unknown | |||
|---|---|---|---|---|---|
| Age | Range | Age | Range | Age | Range |
| 0- | 2.4-4.1 | 0- | 2.4-4.1 | 0- | 2.4-4.1 |
Effective date: 08/01/2016
Interferences and Limitations
Biotin supplements can cause falsely elevated values. See Limitations of Laboratory Testing for details.
Ordering & Collection
Specimen Type
Collection
HMC and UW-MT Onsite Locations:
Preferred: 4 mL blood in LIME GREEN PST tube
Also Acceptable: 4 mL blood in ORANGE RST, GOLD SST, RED TOP or GREEN TOP tube
Pediatric, Preferred: 1 Full LIME GREEN MICROTAINER
Pediatric, Also Acceptable:1 Full GOLD MICROTAINER
Unacceptable: LAVENDER TOP
Offsite Clinic or Other Locations: Preferred: 4 mL blood in GOLD SST tube
Also Acceptable: 4 mL blood in ORANGE RST or LIME GREEN PST, RED TOP or GREEN TOP tube
Pediatric, Preferred: 1 Full LIME GREEN MICROTAINER
Pediatric, Also Acceptable:1 Full GOLD MICROTAINER
Unacceptable: LAVENDER TOP
Quantity
requested: 1 mL serum/plasma
minimum: 0.5 mL serumplasma
Processing
Refrigerate serum/plasma
STABILITY: Free T3 is stable in serum and plasma for up to 2 days refrigerated and 2 months frozen.
Performance
LIS Dept Code
Chemistry, Automated Panels (CHA)
Performing Location(s)
| UW-MT |
Chemistry, Automated
206-520-4600 Clinical Lab, Room NW220, |
|
|---|---|---|
| UW-NW |
Main Lab
206-668-1344 UW Medical Center – Northwest |
Frequency
Daily
Available STAT?
No
Billing & Coding
CPT codes
84481
LOINC
Interfaced Order Code
UOW988
Interfaced Result Code
UOW988