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Tri iodo thyromine kinetics in eu thyroid graves disease patients who exhibit hyper responsiveness to trh after radio iodine treatment

Clinical Endocrinology 15(4): 417-421

Tri iodo thyromine kinetics in eu thyroid graves disease patients who exhibit hyper responsiveness to trh after radio iodine treatment

A major reduction in T3 [triiodothyronine] was demonstrated previously in clinically hypothyroid patients. This study used non-compartmental (NC) and mono-compartmental (MC) analysis to study 10 patients with Graves' disease who, following treatment with radioactive iodine (RAI), are now clinically euthyroid but who showed hyper-responsiveness to TRH although serum T3 and thyroxine concentrations are within the normal range. T3 production rate (PR), metabolic clearance rate (MRC) and fractional-turnover (K) were all significantly reduced in patients compared with 7 controls (P < 0.01). T3, MCR and PR were consistently higher, and T3 K lower, when calculated by MC, than values calculated by NC analysis. The difference in T3 production rates between patients (mean 16.6 nmol/day) and controls (mean 38.9 nmol/day) raises the question of replacement therapy in patients who are apparently euthyroid but TRH hyper-responsive.

Accession: 006840103

Related references

Jaffiol, C.; Baldet, L.; Missonne, C.L.; Papachristou, C., 1981: T3 kinetics in euthyroid Graves' disease patients who exhibit hyper-responsiveness to TRH after radioiodine treatment. A major reduction in T3 turnover has been demonstrated previously in clinically hypothyroid patients. We have used non-compartmental (NC) and monocompartmental (MC) analysis to study ten patients with Graves' disease who, following treatment...

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