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T3 Resin UptakeAka: T3 Binding Ratio, T3RU
- Indications
- Used to calculate Free Thyroxine Index (FTI)
- Interpret in conjunction with Total T4 or Total T3
- Corrects for abnormal Thyroid Binding Globulin (TBG)
- Free T4 also corrects for Thyroid Binding Globulin
- Free T4 is preferred over FTI (and T3RU)
- Used to calculate Free Thyroxine Index (FTI)
- Measurement
- Unbound Thyroid Binding Globulin filled with T3
- Remaining unbound Triiodothyronine (T3) is measured
- Increased T3 Resin Uptake
- Hyperthyroidism
- Systemic illness
- Cirrhosis
- Nephrotic Syndrome
- X-linked decreased Thyroid Binding Globulin
- Cushing's Disease
- Acromegaly
- Diabetic Ketoacidosis (DKA)
- Drugs
- Prednisone
- Androgen
- Salicylates
- Anabolic Steroids
- Asparaginase
- Decreased T3 Resin Uptake
- Hypothyroidism
- Pregnancy
- Hepatitis
- Porphyria
- X-Linked increased Thyroid Binding Globulin (TBG)
- Primary Biliary Cirrhosis
- Malnutrition
- Drugs
- Estrogen
- Oral Contraceptives
- Perphenazine
- Fluorouracil
- Clofibrate
T3 uptake measurement (C0202224) | |
|---|---|
| Concepts | Laboratory Procedure (T059) |
| English | T3 - Triiodothyronine uptake, T3 resin uptake, T3 uptake measurement, T3 uptake test, T3RU, T3U measurement, Tri-iodothyronine resin uptake measurement, Triiodothyronine resin uptake |
| Spanish | medicion de captacion de T3, medicion de la captacion de resina de triyodotironina, medicion de T3U, prueba de captacion de T3, prueba de captacion de triyodotironina |
| Parent Concepts | Chemical procedure (C0201682), Thyroid hormone measurement (C0430083), Duplicate concept (C1274013) |
| Sources | LNC, MTH, SCTSPA, SNOMEDCT Derived from the NIH UMLS (Unified Medical Language System) |
