Abstract
Mini-gastric bypass/One-anastomosis gastric bypass (MGB-OAGB) is an effective bariatric technique for treating overweight and obesity, controlling and improving excess-weight-related comorbidities. Our study evaluated OAGB characteristics and resulting weight evolution, plus surgical success criteria based on various excess weight loss indicators. A prospective observational study of 100 patients undergoing OAGB performed by the same surgical team (two-year follow-up). Surgical characteristics were: surgery duration, associated complications, bowel loop length, hospital stay, and weight loss at 6 postoperative points. 100 patients were treated (71 women, 29 men); mean initial age was 42.61 years and mean BMI, 42.61 ± 6.66 kg/m2. Mean surgery duration was 97.84 ± 12.54 minutes; biliopancreatic loop length was 274.95 ± 23.69 cm. Average hospital stay was 24 hours in 98% of patients; no surgical complications arose. Weight decreased significantly during follow-up (P < 0.001). Greatest weight loss was observed at 12 months postsurgery (68.56 ± 13.10 kg). Relative weight loss showed significant positive correlation, with greatest weight loss at 12 months and %excess BMI loss > 50% achieved from the 3-month follow-up in 92.46% of patients. OAGB seems to be effective in treating obesity, with short hospital stays. Relative weight loss correlates optimally with absolute outcomes, but both measures should be used to evaluate surgical results.
Highlights
Mini-gastric bypass/One-anastomosis gastric bypass (MGB-one-anastomosis gastric bypass (OAGB)) is an effective bariatric technique for treating overweight and obesity, controlling and improving excess-weight-related comorbidities
Our study evaluated OAGB characteristics and resulting weight evolution, plus surgical success criteria based on various excess weight loss indicators
The indication criteria for bariatric surgery accepted by the International Federation for the Surgery of Obesity (IFSO) are either Body mass index (BMI) > 40 kg/m2, or BMI > 30–35 kg/m2 and presenting metabolic disease with inadequate monitoring or under medical treatment
Summary
Mini-gastric bypass/One-anastomosis gastric bypass (MGB-OAGB) is an effective bariatric technique for treating overweight and obesity, controlling and improving excess-weight-related comorbidities. Among the bariatric mixed-type surgical procedures (restrictive and malabsorptive component), the laparoscopic one-anastomosis gastric bypass (OAGB), a modified mini-gastric bypass (MGB)[6], characteristically offers effective, long-term weight loss results[7]. The method most widely used and accepted among surgeons is using the criteria initially described by Halverson and Koehler[9] defining surgery success as %EWL > 50 and adding Reinhold’s10 result assessment based on final excess weight and ideal weight. These indicators are different, causing the lack of consensus in defining target postsurgery weight, accepting BMI = 25 kg/m2 as successful treatment. Knowing initial weight and its postsurgery evolution is necessary, not establishing surgery success using relative terms such as %EWL11
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