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Background: Weight loss failure after bariatric surgery imposes great stress on patients and surgeons and great costs on healthcare systems. The literature review shows that weight loss failure is the most common cause of redo bariatric surgery. Therefore, identifying the predictors of weight loss failure in patients in the early stages can help bariatric surgeons. The present study aims to determine the association between primary weight loss and long-term weight loss outcomes., Methods: This retrospective cohort study was conducted on 329 patients undergoing OAGB who were followed for 60 months. For the prediction of short-term (24 months) and long-term (60 months) successful weight loss and weight regain, we used %TWL and BMI at any regular follow-ups., Results: In preoperative indices, age, sex, DLP, hypothyroidism, and HTN were not significant to predict successful short-term and long-term weight loss but %TWL at 12 months is a significant predictor of successful weight loss in short-term and long-term follow up. In the prediction of weight regain, preoperative indices (except BMI) were not significant but 12-month %TWL was a significant predictor., Conclusions: This index can help surgeons find these patients early and provide helpful instructions to manage their issues more promptly to reach better weight loss outcomes., (© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)

Purpose: Gastroesophageal reflux disease (GERD) is an issue after one anastomosis gastric bypass (OAGB) and modification of OAGB with adding an anti-reflux system may decrease the incidence of postoperative GERD. This study aimed to compare the efficacy of the anti-reflux mechanism to treat preoperative GERD and prevent de novo GERD., Methods: A prospective randomized clinical trial study was conducted on patients with a body mass index of 40 and more from August 2020 to February 2022. Patients undergoing one anastomosis gastric bypass with and without anti-reflux sutures (groups A and B, respectively). These patients had follow-ups for one year after the surgery. GERD symptoms were assessed in all the patients using the GERD symptom questionnaire., Results: The mean age was 39.5 ± 9.8 years and 40.7 ± 10.2 years in groups A and B respectively. GERD symptoms remission occurred in 76.5% and 68.4% of patients in groups A and B, respectively. The incidence of de novo GERD symptoms was lower in group A, compared to group B (6.2% and 16.1% in groups A and B respectively), without any statistically significant difference (p-value: 0.239)., Conclusion: GERD symptoms and de novo GERD after OAGB seems to be under-reported after OAGB. This study suggests that applying an anti-reflux suture can decrease de novo GERD symptoms., (© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)

Purpose: The present research was conducted to evaluate the effect of the severity of dumping syndrome (DS) on weight loss outcomes after Roux-en-Y gastric bypass (RYGB) in patients with class III obesity., Methods: The present retrospective cohort study used the dumping symptom rating scale (DSRS) to evaluate the severity of DS and its correlation with weight loss outcomes in 207 patients 1 year after their RYGB. The patients were assigned to group A with mild-to-moderate DS or group B with severe DS., Results: The mean age of the patients was 42.18 ± 10.46 years and their mean preoperative BMI 42.74 ± 5.59 kg/m 2 . The total weight loss percentage (%TWL) in group B was insignificantly higher than that in group A, but besides that was not significantly different in the two groups., Conclusion: The present findings suggested insignificant relationships between the presence and severity of DS after RYGB and adequate postoperative weight loss., (© 2023. The Author(s).)

This study review the prevalence of selenium deficiency after bariatric surgery, incidence, and symptoms. A systematic literature search and meta-analysis was performed in PubMed and Scopus for articles published by November 1, 2021, including the keywords "Roux-en Y gastric bypass", "RYGB", "Omega bypass", "Mini bypass", "One anastomosis gastric bypass", "Bariatric surgery", "Weight loss surgery", "Metabolic surgery", "Gastric bypass", "Loop gastric bypass", "Selenium", "Selenium deficiency", or a combination of aimed tothem in the title or abstract. In this review, nine studies examining a total of 1174 patients were included in this meta-analysis. The mean age of the patients was 41.14 ± 7.69 years. The mean interval between bariatric surgery and selenium deficiency was 40.36 ± 43.29 months. Mean BMI before surgery and at the time of selenium deficiency was 43.68 ± 4.91 kg/m 2 and 28.41 ± 9.09 kg/m 2 , respectively. Additionally, the results showed a prevalence of 16% and 2% of selenium deficiency at 1- and 2-year follow-up after bariatric surgery, respectively. Symptoms included weakness, myopathy, and cardiomyopathy, loss of muscle mass, erythematous desquamating eruption, lethargy, dyspnea, and bilateral lower extremity pitting edema. Forty percent of studies reported "Selenium orally (100 μg once daily)" as treatment option. A multidisciplinary team of healthcare professionals, including dietitians, should be involved in the bariatric patient's care. As a result, clinicians should encourage patients to take supplements for the rest of their lives, and patients should be monitored after surgery if necessary., (© 2022. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)

Purpose: With the global increase in life expectancy and the subsequent impaired quality of life in older obese adults, modalities such as bariatric surgery become crucial to help lose excess weight. This study was conducted to evaluate the effectiveness and safety of one anastomosis gastric bypass (OAGB) in patients 65 years old and above., Materials and Methods: This retrospective cohort study was conducted on 61 patients with severe obesity aged ≥ 65 years through Iran National Obesity Surgery Database. The patients had undergone OAGB and were followed up for 12 to 60 months. The required data was extracted through national database., Results: Mean age and BMI of the patients were 67.62 ± 2.03 years and 46.42 ± 5.46 kg/m 2 , respectively. Regarding gender, 90.1% of the participants were female. Mean operative time and length of hospital stay were 41.37 ± 13.91 min and 1.16 ± 0.61 days, respectively. Five patients (8.19%) required ICU admission. The changes in %TWL after 3, 6, 12, 24, 36, 48, and 60 month follow-up was 18.62%, 25.51%, 32.84%, 35.86%, 38.49%, 31.41%, and 29.52%, respectively. The resolution of gastroesophageal reflux disease, diabetes mellitus, dyslipidemia, obstructive sleep apnea, and hypertension after 24 month was about 100%, 65%, 73.33%, 100%, and 76%, respectively. The postoperative early and late complications were 6.53% and 11.46%, respectively. We did not find significant difference in above results between two age groups of 65-70 and > 70 years., Conclusions: OAGB can be a good choice in older obese adults because of its shorter operative time, higher potency, and low complication rate., (© 2022. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)

Conversional bariatric surgery is a challenging procedure to patients as well as the surgeon. One anastomosis gastric bypass (OAGB) is a known safe conversional procedure after primary restrictive weight loss surgeries such as vertical banded gastroplasty (VBG). A very rare reported complication after these operations is the formation of mucocele of gastric remnant during pouch creation. This is a video report of diagnosis and management of gastric remnant mucocele after conversion of VBG to OAGB., (© 2021. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)