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HelpTest Code FT4 T4, Free
Specimen Type
Blood
Preferred Collection Container
GRN-PSTCollection Volume
5 mL
Minimum Collection Volume
1 mL
Collection Instructions
Routine venipuncture
Rejection Criteria
Inadequate labeling, improper collection.
Specimen Storage and Stability
Stable up to 48 hours at 2-8 C
Turn Around Time
8 hours
Lab Department
Chemistry
Alias
Thyroxine, Free; T4, Free, Serum
Ordering Info
Significant interference from biotin can be observed with this assay. It is recommended that patients refrain from taking any supplements containing biotin for 24 hours before having this test drawn.EPIC Code
LAB127
Acceptable Collection Container
GRN-PST, SST, R-NoGel, G-NoGel
Testing Volume
0.5 mL (500 ul)
Day(s) and Time(s) Performed
Monday through Sunday, 24 hours