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  • Title: Parathyroid hormone secretory reserve in patients submitted to 131-iodine therapy for hyperthyroidism.
    Author: Vieira JG, Brandão CM, Kasamatsu TS, Furlanetto RP.
    Journal: Braz J Med Biol Res; 1991; 24(11):1103-5. PubMed ID: 1822999.
    Abstract:
    Twelve euthyroid patients who had been treated with 131I for hyperthyroidism due to Graves' disease and six normal controls were submitted to an EDTA infusion test. Ionized calcium and parathyroid hormone were measured in serum samples collected every 10 min during the 2-h test. Basal values for calcium (1.22 +/- 0.03 vs 1.23 +/- 0.03 pmol/l, mean +/- SD, controls vs patients) and parathyroid hormone (3.3 +/- 0.65 vs 5.1 +/- 2.32 pmol/l) as well as maximum response during infusion (1.01 +/- 0.04 vs 1.01 +/- 0.05 for calcium and 12.0 +/- 2.2 vs 13.1 +/- 3.7 for parathyroid hormone) were not significantly different. We conclude that 131I treatment for hyperthyroidism due to Graves' disease had no effect on the parathyroid gland secretory reserve of the patients studied.
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