Outcomes After One Year of Single Anastomosis Duodenal Switch Surgery

Overview

This prospective multicenter study evaluated the 1-year outcomes of the single-anastomosis duodenal switch (SADS) procedure in 120 patients with class II and III obesity. Results demonstrated significant weight loss, improvement in obesity-related comorbidities, and manageable nutritional status, supporting SADS as an effective bariatric surgery option.

Background

Bariatric surgery remains the most effective treatment for severe obesity, but the optimal procedure is debated. Traditional procedures like biliopancreatic diversion and duodenal switch offer superior weight loss but carry risks of protein and vitamin deficiencies. Roux-en-Y gastric bypass and vertical sleeve gastrectomy are common alternatives but have limitations including suboptimal weight loss or complications. The SADS procedure combines a calibrated sleeve gastrectomy with a single intestinal anastomosis to potentially maximize weight loss while minimizing nutritional deficiencies.

Data Highlights

Key Findings

• The SADS procedure resulted in significant weight loss at 1 year, measured by %EWL, %TWL, and BMI reduction.
• Obesity-related comorbidities such as type 2 diabetes, hypertension, sleep apnea, and hyperlipidemia showed substantial resolution or improvement.
• Vitamin and protein nutritional status were closely monitored; supplementation protocols helped maintain manageable deficiency rates.
• Quality of life scores improved significantly postoperatively, including reductions in gastroesophageal reflux symptoms.
• The procedure was performed laparoscopically with a standardized technique involving a sleeve gastrectomy and a single duodeno-ileostomy anastomosis 300 cm from the ileocecal valve.
• Serious adverse events were tracked and verified, supporting the safety profile of the SADS procedure within the first postoperative year.

Clinical Implications

The SADS procedure offers a promising surgical option for patients with class II and III obesity, combining effective weight loss with improved comorbidity resolution and manageable nutritional outcomes. Clinicians should consider this approach especially for patients at risk of suboptimal weight loss with other bariatric surgeries. Close postoperative monitoring and supplementation remain essential to mitigate nutritional deficiencies.

Conclusion

At one year, the single-anastomosis duodenal switch demonstrates significant efficacy in weight reduction and comorbidity resolution with an acceptable safety and nutritional profile, supporting its role as a valuable bariatric surgery option.

References

1. Mitzman et al. -- Description of the SADS Procedure
2. Roslin, Cottam et al. -- Outcomes After One Year of Single Anastomosis Duodenal Switch Surgery