ArticleObesity surgery2019
Differences in Calcium Metabolism and Thyroid Physiology After Sleeve Gastrectomy and Roux-En-Y Gastric Bypass.
Article in Obesity surgery, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 5 of them syntheses that pooled it.
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Who cites it
13 citing papers in PubMed, 5 syntheses or guidelines pooled it, 23 citations in OpenAlex.
- Time Trends in Thyroid Hormone Changes Following Bariatric Surgery: A Systematic Review and Meta-Analysis.Obesity surgery · 2026Pooled it
- Thyroid function post-bariatric surgery: an updated systematic review and meta-analysis.Obesity surgery · 2025Pooled it
- A Systematic Review and Meta-Analysis of Vitamin D Status of Patients with Severe Obesity in Various Regions Worldwide.Obesity facts · 2023Pooled it
- Changes in Nutritional Outcomes After Sleeve Gastrectomy: a Systematic Review and Meta-analysis.Obesity surgery · 2022Pooled it
- In Terms of Nutrition, the Most Suitable Method for Bariatric Surgery: Laparoscopic Sleeve Gastrectomy or Roux-en-Y Gastric Bypass? A Systematic Review and Meta-analysis.Obesity surgery · 2020Pooled it
- Hormonal adaptations to weight loss: Responses to an oral glucose load 4 weeks after obesity surgery and low-energy diet.Diabetes, obesity & metabolism · 2025Trial
- Thyroid Volume Stabilization and Nodule Progression After Bariatric Surgery: Insights from a Retrospective Study.Obesity surgery · 2025Article
- Effects of laparoscopic sleeve gastrectomy on thyroid hormones and relationship between metabolic parameters and long-term total weight loss.Surgical endoscopy · 2024Article
- Urolithiasis and sleeve gastrectomy: a prospective assessment of urinary biochemical variables.Revista do Colegio Brasileiro de Cirurgioes · 2021Article
- Thyroid Hormone Changes After Sleeve Gastrectomy With and Without Antral Preservation.Obesity surgery · 2021Article
- Review
- The advantages and disadvantages of sleeve gastrectomy; clinical laboratory to bedside review.Heliyon · 2020Review
- Preoperative Thyroid Autoimmune Status and Changes in Thyroid Function and Body Weight After Bariatric Surgery.Obesity surgery · 2019Article
Corrections and comments
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Authors and funding
6 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionBariatric surgery may modulate the hormones and elements which maintain thyroid and calcium homeostasis. These adaptations in hormonal and elemental aspects have previously been determined via some studies with variations in their findings. Thyroid volume and 24-h urinary calcium are two parameters which have not been investigated regarding whether they change during the bariatric postsurgical period. This study planned to examine the changes in calcium metabolism and thyroid gland functioning after sleeve gastrectomy (SG) and Roux-en-Y gastric bypass (RYGB). MATERIALS AND
methodsSeventy-three morbidly obese patients with planned bariatric surgery were enrolled in the study. Before and 12 months after the operation, parathormone (PTH), 25-OH-vitamin D3(25vitD3), TSH, free triiodothyronine (fT3), free thyroxine (fT4), calcium (Ca), 24-h urinary Ca and ultrasonography-guided thyroid volume were measured.
resultsIn the beginning, 73 patients were examined and 12 months after surgery out of 25 patients continuing follow-up, 20 (80%) had undergone sleeve gastrectomy (SG) while five (20%) had undergone Roux-en-Y gastric bypass (RYGB). Accompanied by significant BMI decrease, 24-h urinary Ca and thyroid volume did not significantly increase in RYGB, SG, and the whole group after 12 months. The SG group showed a significant drop in TSH (p 0.03) level, while the RYGB group showed significant decreases in fT4 (p 0.00) and fT3 (p 0.00); and significant fT3 decrease (p 0.01) was recorded for the whole group.
conclusionBariatric surgery may modify Ca homeostasis and thyroid gland functional status. We documented that these were not statistically significant increases in 24-h urinary Ca level and thyroid volume after 1 year. Further studies are needed to understand the issue, enrolling more patients who underwent the same bariatric procedure and after accounting for the inhibition of supplementary vitamin and mineral effects.
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