Thyroxine (T4)
General Information
- Lab Name
- Thyroxine (T4)
- Lab Code
- T4
- Epic Name
- T4 (Thyroxine), Total
- Synonyms
- T4, thyroid function
- Components
Interpretation
- Method
Chemiluminescence
- Reference Range
-
Units: mcg/dL
Female Male Age Range Age Range 0-29d 4.8-10.8 0-29d 4.8-10.8 1m- 4.8-10.8 1m- 4.8-10.8 Effective date: 03/16/2010
Ordering & Collection
- Specimen Type
- Blood
- 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 - Handling Instructions
Note: T4 cannot be added on to a specimen more than 12 hours after it has already gone through the automation line and stored.
- Quantity
-
Requested: 1 mL serum/plasma
Minimum: 0.5 mL serum/plasma
Processing
- Receiving Instructions
Refrigerate serum/plasma.
Stability: Room Temperature: 8 hours; Refrigerator: 12 hours; Freeze at -20°C: >12 hours. Thaw sample only once.
- Misc Sendout
Performance
- Lab Department
- Chemistry, Automated Panels(CHA)
- Frequency
- Daily
- Available STAT?
- No
- Performing Location(s)
-
HMC Chemistry, Automated
206-520-4600325 9th Ave, Rm # GWH-47, Seattle, WA 98104-2420
UW-MT Chemistry, Automated
206-520-4600Clinical Lab, Room NW220,
University of Washington Medical Center,
1959 NE Pacific street, Seattle, WA 98195
Billing & Coding
- CPT Codes
- 84436
- LOINC
- 3026-2
- Interfaced Order Code
- UOW1748
- Interfaced Result Code
- UOW1748