Thyroid stimulating hormone with reflex to free T4
Thyroid stimulating hormone with reflex to free T4-8960
Thyrotropic hormone
Any TSH value of <0.35 or >4.94 µIU/mL will automatically reflex to a Free T4 at an additional charge
This reflex test was established on the recommendation of the Clinical Practice Council to be the preferred first lab test ordered in the screening for thyroid disease.
Any TSH value of <0.35 or >4.94 µIU/mL will automatically reflex to a Free T4. Providers also have the ability to order each of these tests (TSH and FT4) individually.
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)
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
Frozen - 6 months
Ambient - NO
- Improper labels (unlabeled or mislabeled)
- Hemolysis (some procedures)
- Improper anticoagulant or ratio
- Delay in transport
- Improper storage temperature affecting results
- Inappropriate timing of collection
- Improper container
- Leaking container resulting in compromised specimen
- Quantity not sufficient (QNS)
Electrochemiluminescence immunoassay (ECLIA)
0.270 - 4.20 µIU/mL