II. Interpretation: Normal
- Free Thyroxine Index: 4-11
III. Indications
- Largely replaced by Free T4 (Free Thyroxine)
- Corrects for abnormal Thyroid Binding Globulin (TBG)
-
Free T4 also corrects for Thyroid Binding Globulin
- Free T4 is preferred over FTI
IV. Measurement
- Calculated: T4 x T3 Binding Ratio (T3RU)
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Related Studies
| Concepts | Laboratory Procedure (T059) |
| SnomedCT | 166333003, 143690007, 39700003 |
| Italian | Indice di tiroxina libera |
| Japanese | 遊離サイロキシンインデックス, ﾕｳﾘｻｲﾛｷｼﾝｲﾝﾃﾞｯｸｽ |
| English | free thyroxine index (lab test), free thyroxine index, Free thyroxine index test, FTI (free T4 index), FTI (free thyroxine index), free T4 index, free thyroxine index test, Free thyroxine index (& level), Free thyroxine index (& level) (procedure), Free thyroxine index, FT4 index, FTI, FT4I, FTI - Free thyroxine index, Free thyroxine index level, Free thyroxine index (procedure) |
| Czech | Index volného tyroxinu |
| Hungarian | Szabad tiroxin index |
| Spanish | índice de FT4, índice de tiroxina libre (procedimiento), índice de tiroxina libre, Índice de tiroxina libre |
| Portuguese | Índice de tiroxina livre |
| Dutch | vrij-thyroxine-index |
| French | Index de thyroxine libre |
| German | Freies Thyroxin-Index |
