{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,20]],"date-time":"2026-03-20T14:01:02Z","timestamp":1774015262388,"version":"3.50.1"},"reference-count":32,"publisher":"FapUNIFESP (SciELO)","license":[{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"am","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Acta Cir. Bras."],"abstract":"<jats:p>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.<\/jats:p>","DOI":"10.1590\/acb411426","type":"journal-article","created":{"date-parts":[[2026,2,16]],"date-time":"2026-02-16T15:31:29Z","timestamp":1771255889000},"source":"Crossref","is-referenced-by-count":0,"title":["Bone health up to five years after Roux-en-Y gastric bypass: a cross-sectional study during the COVID-19 pandemic"],"prefix":"10.1590","volume":"41","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-8360-6401","authenticated-orcid":false,"given":"Alexandre Naegele de","family":"Oliveira","sequence":"first","affiliation":[{"name":"Instituto de Pesquisa S\u00e3o Leopoldo Mandic,  Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6829-2722","authenticated-orcid":false,"given":"Ta\u00eds Daiene Russo","family":"Hortencio","sequence":"additional","affiliation":[{"name":"Instituto de Pesquisa S\u00e3o Leopoldo Mandic,  Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7581-7734","authenticated-orcid":false,"given":"Daniela Vicinansa Monaco","family":"Ferreira","sequence":"additional","affiliation":[{"name":"Instituto de Pesquisa S\u00e3o Leopoldo Mandic,  Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4060-7803","authenticated-orcid":false,"given":"Karina Schiavoni Scandelai Cardoso dos","family":"Reis","sequence":"additional","affiliation":[{"name":"Universidade Federal do Rio de Janeiro,  Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4833-3571","authenticated-orcid":false,"given":"Roberto Jos\u00e9 Negr\u00e3o","family":"Nogueira","sequence":"additional","affiliation":[{"name":"Universidade Estadual de Campinas,  Brazil; Universidade Estadual de Campinas,  Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"530","published-online":{"date-parts":[[2026]]},"reference":[{"key":"ref1","series-title":"Obesity and overweight","year":"2021"},{"issue":"9","key":"ref2","doi-asserted-by":"crossref","first-page":"1536","DOI":"10.1007\/s11695-014-1311-1","article-title":"Systematic review and meta-analysis of medium-term outcomes after banded Roux en-Y gastric bypass","volume":"24","author":"Buchwald H","year":"2014","journal-title":"Obes Surg"},{"issue":"3","key":"ref3","doi-asserted-by":"crossref","first-page":"233","DOI":"10.1381\/096089200321643511","article-title":"Laparoscopic gastric bypass, Roux en Y-500 patients: technique and results, with 3\u201360 month followup","volume":"10","author":"Wittgrove AC","year":"2000","journal-title":"Obes Surg"},{"issue":"1","key":"ref4","doi-asserted-by":"crossref","first-page":"12","DOI":"10.1016\/j.clnu.2015.02.012","article-title":"Twelve key nutritional issues in bariatric 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