TY  - JOUR
T1  - TRiiodothyronine levels
AU  - Hydovitz JD, Lippe RD, Melada GA
Y1  - 1979/11/01
N1  - 10.1001/archinte.1979.03630480091041
JO  - Archives of Internal Medicine
SP  - 1319
EP  - 1320
VL  - 139
IS  - 11
N2  - To the Editor.— 
    The "isolated high serum triiodothyronine levels" discussed in the article by Soler et al in the Archives (139:36-38, 1979) represent the type of data that occasionally generates uncertainty in the interpretation of thyroid function studies in patients with or without clinical manifestations of thyroid disease.While the radioimmunoassay techniques used in the measurement of triiodothyronine (T3) do supply information that is reliable and reproducible in most instances, procedural problems can result in erroneous values that are entirely discordant with the patient's clinical status. In this setting, it would be most appropriate to repeat the determinations for verification before embarking on some additional diagnostic maneuver or plotting a course of therapy.Serum free thyroxine index units, the measurement used in the study reported by Soler et al, do not contribute any indirect information in regard to the concentrations of thyroxine binding proteins. Consequently, the serum total T
SN  - 0003-9926
M3  - doi: 10.1001/archinte.1979.03630480091041
UR  - http://dx.doi.org/10.1001/archinte.1979.03630480091041
ER  -