title: The one-step approach to thyroid function tests. The diagnostic thyroxine ratio (DTR)/serum thyroxine (T4) level combination.
abstract: A one-step approach to thyroid function tests is reported, using Tetralute kits (Ames). Two parameters are obtained simultaneously--namely, the serum thyroxine (T4) level and the diagnostic thyroxine ratio (DTR), which correlates well with the free thyroxine index (FTI) as determined by two separate tests-the T4 level and the triiodothyronine resin uptake ((T3U)) estimations. Data presented from patients with a variety of thyroid states prove that the DTR, particularly in combination with the T4 level, is adequate for the assessment of thyroid dysfunction in almost all circumstances.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003276:Contraceptives, Oral; D005260:Female; D006801:Humans; D006980:Hyperthyroidism / Q000097:blood / Q000532:radiotherapy; D007037:Hypothyroidism / Q000097:blood; D007231:Infant, Newborn; D007457:Iodine Radioisotopes; D008297:Male; D008875:Middle Aged; D011247:Pregnancy; D012712:Serum Globulins; D013960:Thyroid Function Tests; D013974:Thyroxine / Q000097:blood* / Q000627:therapeutic use; D013975:Thyroxine-Binding Proteins
chemical_list: D003276:Contraceptives, Oral; D007457:Iodine Radioisotopes; D012712:Serum Globulins; D013975:Thyroxine-Binding Proteins; D013974:Thyroxine