T4, free-251
Test info
T4, free
251
84439.0
FT4
Free thyroxine
FT4
FT4
Specimen
Lithium heparin (Li hep) plasma
1.0 mL
0.2 mL
Immediately follow collection, mix sample by inverting 8 - 10 times to prevent clotting
Spin within two (2) hours of sample collection
Lt green plasma separator (PST)
Serum
Immediatley following collection, mix sample by inverting 5 times
Gold:
- Allow sample to clot for a minimum of 30 minutes
- Spin within two (2) hours of sample collection
Red:
- Allow sample to clot
- Spin
- Transfer serum to a False bottom plasma/serum transport vial/tube (AHL), labelled as serum, within two (2) hours of sample collection
Refrigerated (preferred) - 7 days
Ambient - 5 days
Frozen - 30 days
- Improper labels (unlabeled or mislabeled)
- Hemolysis
- Improper anticoagulant or ratio
- Delay in transport
- Improper storage temperature affecting results
- Improper container
- Leaking container resulting in compromised specimen
- Quantity not sufficient (QNS)
Performance
AHL - Chemistry: C
Daily
1 day
Electrochemiluminescence immunoassay (ECLIA)
Clinical and Interpretive info
0.93 - 1.70 ng/dL
Billing
84439
Yes
Tracking
11/30/2001
01/01/2023
12/02/2021