Secondary hyperparathyroidism and vitamin D deficiency in patients after laparoscopic sleeve gastrectomy
DOI:
https://doi.org/10.32782/2415-8127.2024.69.3Keywords:
Bariatric surgery, obesity, laparoscopic sleeve gastrectomy, ionized calcium, 25 hydroxycalciferol, parathyroid hormone, vitamin D deficiency, secondary hyperparathyroidismAbstract
The purpose of this study is to investigate the vitamin D deficiency and secondary hyperparathyroidism (SHPT) in patients after laparoscopic sleeve gastrectomy (LSG). The study is based on a review of medical records and clinical data collected from patients with morbid obesity after laparoscopic sleeve gastrectomy. The materials and methods. A total of 79 patients (without SHPT at the baseline) after LSG were included in the study, with a mean age of 40,7±11,4 years. All patients were divided into 2 groups depending on the receipt of additional vitamin and mineral therapy in the postoperative period. The first group (n=38) who did not receive additional therapy in the postoperative period. The second group (n=41) who received vitamins and trace elements (cholecalciferol 2 000 IU, calcium 1,000 mg and a multivitamin 1 tablet per day). Anthropometric parameters, ionized calcium (Ca2+), 25 hydroxycalciferol (25(OH)D), parathyroid hormone (PTH), were compared before and 1 year after LSG. The prevalence of vitamin D deficiency (< 20 ng/ml) and secondary hyperparathyroidism (> 88 pg/mL) at different time points was calculated. Results. The median 25(OH)D levels in both groups were within normal limits, but in the first group the median was statistically significantly lower compared to the median of the same indicator in the second group (p=0.001). The number of cases of vitamin D hypovitaminosis was statistically significantly higher in the first group, 17 vs 5 patients, respectively (p=0.003). The overall prevalence of SHPT was recorded in 14 (17.7%) patients included in this study, with a statistically significant majority of cases in the first group 12 vs. 2 (p=0.005) patients, respectively. Post-operatively, PTH levels had a strong significant inverse relationship with 25(OH)D and Ca2+ levels (p<0.001). Conclusion. Patients after laparoscopic sleeve gastrectomy have a risk of secondary hyperparathyroidism and vitamin D deficiency in the postoperative period. The higher levels of parathyroid hormone post laparoscopic sleeve gastrectomy significantly related to vitamin D deficiency and lower calcium levels. Additional vitamin and mineral therapy in the postoperative period after laparoscopic sleeve gastrectomy significantly reduces the risk of developing secondary hyperparathyroidism and vitamin D deficiency. This study also emphasizes the importance of routine testing for hyperparathyroidism and vitamin deficiency after laparoscopic sleeve gastrectomy.
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