We performed the basic evaluation of an immunoradiometric assay kit for serum thyroid stimulating hormone“Ab bead TSH kit EIKEN”, and compared its results with those examined by“SPA C-S TSH kit”and“RIA-gnost®tTSH.”In reproducibility of the intra- and inter-assay variance, dilution test and recovery test, good results were obtained in all of them by all kits. The TSH values measured by 3 kits significantly correlated (γ= 0.99) . Normal range of TSH values caliculated from the examination of the healthy controls were 0.32-4.51μU/ml by“Ab bead TSH kit EIKEN”, 0.36-4.96 μU/ml by“SPA C-S TSH kit”and 0.23 - 2.68, μU/ml by“RIA-gnost®tTSH”. In conclusion, these data indicated that“Ab bead TSH kit EIKEN”is very useful for measurement of the serum thyroid stimulating hormone.
