Correlation between Results of a New T-3 Test and the Percentage of Free Thyroxine in Serum

[摘要] A new "T-3" test, based on the competition between serum-binding proteins and Sephadex G-25 for 125I-triiodothyronine, is presented. Results obtained with this commercially available system (TRILUTE) compare favorably with those obtained either by direct measurement of percentage of free thyroxine or by the resin sponge uptake method. The described system requires less time and less plasma (0.05 ml), and the Sephadex column is disposable. Since the results of the T-3 test with TRILUTE and those for the percentage of free thyroxine correlate well, results obtained with the TRILUTE system can validly be converted to percentage of free thyroxine.

[学科分类] 过敏症与临床免疫学