Long-Term Outcomes of Single vs Dual Anastomosis in Duodenal Switch Surgery
Overview
This study compares long-term results of single anastomosis duodenoileal bypass with sleeve gastrectomy (SADI-S) versus traditional biliopancreatic diversion with duodenal switch (BPD/DS). Key findings include comparable weight loss and resolution of obesity-related comorbidities, with differences in nutritional deficiencies and quality of life outcomes.
Background
Biliopancreatic diversion with duodenal switch (BPD/DS) is recognized as the most effective weight loss surgery but is underutilized due to concerns about long-term nutritional complications and quality of life impairment. SADI-S has emerged as a simplified alternative that preserves the core principles of BPD/DS while potentially reducing operative time and nutritional risks by maintaining a longer common channel. Despite promising short- and mid-term results, long-term comparative data between these two procedures remain limited.
Data Highlights
Outcome
SADI-S
BPD/DS
Number of Patients
114 total (allocation criteria applied)
114 total (allocation criteria applied)
Follow-up Duration
Up to 60 months
Up to 60 months
Weight Loss Metrics
Measured by BMI, %TWL, %EBMIL
Measured by BMI, %TWL, %EBMIL
Complications
Short- and long-term complications recorded and classified by Clavien-Dindo
Short- and long-term complications recorded and classified by Clavien-Dindo
Nutritional Deficiencies
Assessed for proteins, ferritin, iron, vitamin D, calcium
Assessed for proteins, ferritin, iron, vitamin D, calcium
Quality of Life
Assessed by BAROS questionnaire
Assessed by BAROS questionnaire
Key Findings
Both SADI-S and BPD/DS achieved significant and comparable long-term weight loss measured by BMI, % total weight loss, and % excess BMI loss.
Resolution rates of obesity-associated medical problems such as type 2 diabetes, hypertension, dyslipidemia, and metabolic syndrome were similar between groups.
SADI-S patients had a longer common channel, which is associated with a potentially lower risk of nutritional deficiencies compared to BPD/DS.
Complication rates, both short-term and long-term, were documented and showed no significant differences, with classification by Clavien-Dindo scale.
Quality of life assessed by the BAROS questionnaire indicated comparable outcomes, though specific differences related to nutritional status and gastrointestinal symptoms were noted.
Postprandial endocrine responses, including GLP-1 release and glycemic variability, differed between procedures, with SADI-S showing a more pronounced GLP-1 response.
Clinical Implications
Clinicians can consider SADI-S as a streamlined alternative to BPD/DS that offers comparable long-term efficacy in weight loss and comorbidity resolution with potentially fewer nutritional complications. Patient selection should incorporate nutritional risk factors, anatomical considerations, and patient preferences to optimize outcomes. Long-term follow-up remains essential to monitor for nutritional deficiencies and manage quality of life.
Conclusion
This study supports that both SADI-S and BPD/DS provide effective long-term weight loss and metabolic improvements. SADI-S offers a simplified surgical approach with a favorable nutritional profile, making it a viable alternative in appropriately selected patients.
References
Brethauer et al. 2015 -- Outcomes Reporting in Metabolic and Bariatric Surgery
STROBE Statement -- Guidelines for Observational Studies
Bariatric Analysis and Reporting Outcome System (BAROS) -- Quality of Life Assessment
