FREE THYROXINE INDEX
Name: FREE THYROXINE INDEX
Mnemonic: FTI
Handling: Need T4 & T3U to calculate FTI. Free T4 is the measured equivalent of FTI and is a better test. However, you need orders for the FT4-YOU CANNOT SUBSTITUTE.
Reported: Routine 4 hr, STAT 1hr
Department: Main Lab