TY  - JOUR
T1  - LEvels of serum thyroid-stimulating hormone in hyperthyroidism
AU  - Smith SR, Burton DW, Izenstark JL
Y1  - 1979/07/01
N1  - 10.1001/archinte.1979.03630440025011
JO  - Archives of Internal Medicine
SP  - 757
EP  - 760
VL  - 139
IS  - 7
N2  - A modified thyroid-stimulating hormone (TSH) radioimmunoassay with particular sensitivity at the bottom end of the normal range was developed using dog serum in standard tubes and reduced quantities of TSH labeled with radioactive iodine (125I) and antiserum. The standard deviation of B0 points was 1%, implying an assay sensitivity of 0.1 μU/mL. This procedure was used to measure serum TSH levels in 32 normal subjects, 18 patients with hyperthyroidism, and seven patients with elevation of serum triiodothyronine (T ) levels. The range of values obtained from normal subjects was <0.1 to 4.1 μU/mL, with 97% of the subjects' values greater than 0.2 μU/mL. All of the hyperthyroid patients had values less than or equal to 0.2 μU/mL. Hence, the modified TSH assay was thought to be of use in distinguishing hyperthyroid from normal subjects. The TSH levels in subjects with elevated T levels ranged from <0.1 to 1.8 μU/mL. These results were thought to indicate heterogeneity within this group and suggest that only certain of these Individuals merit the diagnosis of "T3 toxicosis."(Arch Intern Med 139:757-760, 1979)
SN  - 0003-9926
M3  - doi: 10.1001/archinte.1979.03630440025011
UR  - http://dx.doi.org/10.1001/archinte.1979.03630440025011
ER  -