[Evaluation of the effect of ligation of the inferior thyroid arteries during non-radical thyroidectomy in simple goiter on selected parameters of calcium-phosphate metabolism in the body].

The aim of the paper was to evaluate the effect of inferior thyroid arteries ligation during the incomplete excision of the thyroid gland in patients with simple goitre, exerted on selected parameters of phosphate-calcium balance in the organism as compared with a group of patients, in whom no inferior thyroid arteries were ligated. The study material comprised 84 patients with simple goitre, free of other diseases. The evaluation covered the following parameters of the phosphate-calcium balance in the organism, namely: the concentration of total calcium, protein, dialyzing calcium, inorganic phosphate as well as immunoreactive parathyroid hormone. The study was performed three times: prior to operative procedure, directly after the operative procedure, and three months after the procedure. It has been shown that there are slight, but statistically significant, differences in the behaviour involving the concentration of total and dialyzing calcium as well as IRPTH in serum, depending on the applied operative technique. Directly after the procedure the changes affecting the studied parameters were more pronounced in patients with ligated inferior thyroid arteries. Three months after the operative procedure the mean concentration of IRPTH, total and dialyzing calcium was somewhat higher in patients, whose inferior thyroid arteries were ligated, than in patients, in whom the arteries were not ligated. The described changes were of subclinical character.