- 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
Last Updated: October 10, 2024 @ 9:13 am
Disclaimer:
It is preferable to locate tests on the website and not rely on printed test information, which may soon be out of date. Updated test information can only be guaranteed by using this website.
Choose the Right Test
ARUP Consult® assists with test selection and interpretation
How to Label Your Sample
- Label Your Test 1
- Label Your Test 2
- Label Your Test 3
- Label Your Test 4
- Label Your Test 5
Common Test Phrases
- Label Your Test 1
- Label Your Test 2
- Label Your Test 3
- Label Your Test 4
- Label Your Test 5
Common Lab Definitions
- Serum
- Plasma
- STT
