Bone health up to five years after Roux-en-Y gastric bypass: a cross-sectional study during the COVID-19 pandemic.

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Acta cirurgica brasileira Pub Date : 2026-02-16 eCollection Date: 2026-01-01 DOI:10.1590/acb411426

Alexandre Naegele de Oliveira, Taís Daiene Russo Hortencio, Daniela Vicinansa Monaco Ferreira, Karina Schiavoni Scandelai Cardoso Dos Reis, Roberto José Negrão Nogueira

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Abstract

Purpose: To evaluate bone health in obese patients undergoing surgery using the Roux-en-Y gastric bypass (RYGB) technique.

Methods: In a sample of 22 obese patients undergoing RYGB surgery, evaluation of bone densitometry (BD) and plasma levels of calcium, phosphorus, magnesium, vitamin D (VITD), parathyroid hormone (PTH), alkaline phosphatase, and albumin was performed.

Results: Signs of potential changes in calcification were detected in plasma tests, expressed as a decrease in VITD (46.4%) and an increase in PTH (50%). Three patients presented with bone framework damage. BD was unequivocally altered in three patients. A decrease in bone density was observed in 14 and 15 patients in the lumbar and femoral regions, respectively.

Conclusion: Although PTH and VITD dosages did not show a direct correlation with BD, it was observed that approximately half of the patients had altered dosages of these hormones up to five years after surgery, and there was damage to the bone health expressed by BD. Loss to follow-up may have contributed to the increased risk of developing metabolic bone disease.

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Roux-en-Y胃旁路手术后长达五年的骨骼健康：COVID-19大流行期间的横断面研究

目的：评价采用Roux-en-Y胃旁路术（RYGB）手术的肥胖患者的骨健康状况。方法：选取22例接受RYGB手术的肥胖患者，测定骨密度（BD）及血浆钙、磷、镁、维生素D （VITD）、甲状旁腺激素（PTH）、碱性磷酸酶和白蛋白水平。结果：血浆检查中发现了钙化的潜在变化迹象，表现为VITD下降（46.4%）和PTH增加（50%）。3例患者出现骨框架损伤。3例患者的BD明显改变。腰椎和股骨区分别有14例和15例患者骨密度下降。结论：尽管PTH和VITD的剂量与BD没有直接相关性，但观察到大约一半的患者在手术后5年内改变了这些激素的剂量，并且BD对骨骼健康造成了损害。缺乏随访可能会增加患代谢性骨病的风险。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Acta cirurgica brasileira

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