Laboratory: Clinical Biochemistry
Test Name:
T4 (THYROXINE), FREE BY DIALYSIS - (S)
Test Code: MISC8
Clinical Information:
Test Indications:
This is a second level test used for the evaluation of patients with thyroid hormone results that are inconsistent with the clinical picture, usually due to abnormal binding proteins. Specimens are sent to Mayo Medical Laboratories for testing using Equilibrium Dialysis/Tandem Mass Spectrometry (MS/MS).
Collection Devices:
Specimen Required:

Stability 28 days refrigerated, 21 days frozen.
Referral:
Requisition:
Reference Values:
Availability:
Endocrinology Consult Required
Orderable by physicians specializing in endocrinology or authorized physicians only.
See Also:
More Information:
Specimen Handling:
Centrifuge and transfer serum into plastic vial within 2 hours of collection.
Store and send frozen to HSC Clinical Chemistry - MS5. Specimen is referred to Mayo Medical Labs for analysis.
Test ID: FRT4D (8859)