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HelpTest Code FREE THYROXINE INDEX FREE THYROXINE INDEX
Department
Chemistry
Specimen Type
Plasma or Serum
Method
Competitive Binding Immunoenzymatic Assay with Index Calculation
Container
Lithium heparin (green-top) or No additive with gel (gold top)
Standard Volume
5ml
Minimum Volume
3ml
Pediatric Volume
1ml
Ship Temperature
Room Temperature
Stability Refrigerated
24 hours
Stability Room Temp
8 hours
Stability Frozen
1 month
Days Test Set Up
Monday through Sunday
Group Components
TOTAL T4 AND T3 UPTAKE