Objective: To investigate the changes of thyroid function and blood lipids in patients with Graves' hyperthyroidism after 131I treatment.Methods: Serum thyroid stimulating hormone(TSH), free triiodothyronine(FT3), free thyroxine(FT4), triglyceride(TG), cholesterol(TC), high-density lipoprotein cholesterol(HDL-C), low-density lipoprotein cholesterol(LDL-C),apolipoprotein A(APOA), apolipoprotein B(APOB), glucose(Glu), blood urea nitrogen(BUN),creatinine(Cr)were measured before and 3 months after treatment. According to the thyroid hormone level 3 months after 131I treatment, the patients were divided into hypothyroid group(64cases), euthyroid group(27cases), hyperthyroidism improved group(21cases)and hyperthyroidism rebounded group(15cases). 64 cases with hypothyroidism were further divided into four groups,0-1 group,3-1 group,6-1 group and 9-1 group, and the proportion of dyslipidemia in each group was compared. Results: After 131I treatment, FT3 and FT4 were significantly decreased in the hypothyroid, euthyroid and hyperthyroidism improved groups(P<0.01), while TSH, TC, HDL-C, LDL-C, APOA, APOB, and Cr were increased(P<0.05). In the hyperthyroidism rebounded group, FT3 and FT4 increased, Cr decreased after treatment(P<0.05), there was no significant change in blood lipids. Glu and BUN decreased in the hypothyroid and euthyroid groups after treatment(P<0.05).When FT4≤6 pmol·L-1, the proportion of hypercholesterolemia increased significantly. Conclusion: Significant improvements in FT3, FT4, Glu, BUN and Cr are observed after 131I treatment,and blood lipids increases with the decrease of FT3, FT4, especially in hypothyroid group, when FT4≤6 pmol·L-1, should be on guard against hyperlipidaemia. |
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