Laboratory: Clinical Biochemistry
Test Name:
T4 (THYROXINE), FREE BY DIALYSIS - (S)
Test Code: MIS8
Clinical Information:
Collection Devices:
Specimen Required:


Serum: 2.6 mL
Pediatric Serum: 1.2 mL

Serum must be separated from gel within 4-6 hours of blood draw.
Referral:
Requisition:
Reference Values:
0.8 - 2.0 ng/dL
Reference values apply to all ages.
Availability:
Specific days
Orderable by physicians specializing in endocrinology -authorized physicians only. Appropriate for second level test for the evaluation of patients with routine Free T4 results that are inconsistent with the clinical picture. Test performed at Mayo Medical Clinic Laboratories on Monday, Wednesday and Thursday 3 pm.
See Also:
More Information:
Separate serum from gel within 4-6 hours of blood draw.  Stability:  7 days refrigerated or 14 days frozen.  Store and ship refrigerated (preferred) or frozen to Mayo Medical Laboratories.  Test ID:  FRT4D (8859)