Simply removing a gastric band without converting to another procedure leads to significant weight regain (Pearlstein et al., Obesity Surgery, 2019). Converting to a duodenal switch at the same time — or in a planned second stage — replaces a failed, purely restrictive device with the most powerful bariatric operation available, which combines restriction and malabsorption for the greatest and most durable weight loss (Almuallem et al., Obesity Surgery, 2026).

The best candidates are patients with significant weight regain or inadequate weight loss after a band, often with a higher BMI (generally over 50) and metabolic disease such as type 2 diabetes, who can commit to lifelong vitamin, mineral, and protein supplementation (Peabody et al., SOARD, 2025; Süsstrunk et al., SOARD, 2023). Patients whose main problem is reflux or esophageal dysmotility are usually better served by converting to a gastric bypass instead, which is why a pre-op upper GI study is essential (Pearlstein et al., Obesity Surgery, 2019).

Removing a gastric band without converting to another procedure leads to significant weight regain, because the band was the only thing restricting intake (Zhou et al., Obesity Surgery, 2019). Converting to a sleeve gastrectomy at the same time — or in a planned second stage — replaces the failed, high-maintenance device with a permanent, modern operation that restricts intake and reduces hunger hormones, producing reliable and durable weight loss (Rashdan et al., Medicine, 2026).

For weight-regain conversions, expect meaningful but moderate additional weight loss — studies report about 40% excess weight loss at 1 year and 37% at 2 years, which is less than a first-time operation but far more than GLP-1 medications alone provide for post-surgical weight regain (Marwaha et al., Surgical Endoscopy, 2025). A BMI over 40 at conversion predicts a below-average response, and these patients should discuss alternatives such as a SADI-S conversion or adjunctive medication (Marwaha et al., 2025).

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No. Gastric bypass is the best choice when reflux is the main problem, but when weight regain is the issue and there is no reflux, network meta-analyses rank SADI-S highest for additional weight loss, with comparable complication rates and favorable reflux outcomes (Małczak et al., Obesity Reviews, 2025; Salman et al., World Journal of Surgery, 2024). Other options include one-anastomosis gastric bypass, duodenal switch, and re-sleeve, each with distinct trade-offs — which is why the choice should be individualized (Dantas et al., Obesity Surgery, 2022).

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Yes. The largest national analysis found an overall serious-complication rate of about 7.2% — higher than a primary bypass, but with mortality that was not significantly different — and a single-center series reported a major complication rate of 5.2% (Dang et al., Obesity Surgery, 2023; Frieder et al., SOARD, 2026). Risk is higher when the conversion is done for a stricture, and the operation is best performed at experienced, high-volume centers (Frieder et al., 2026).

When the problem is weight regain or inadequate weight loss (not reflux), especially if the intitial BMI was greater than 50, SADI-S produces more additional weight loss than a gastric bypass. Network meta-analyses rank SADI-S highest for both excess and total weight loss among all sleeve revisions, and head-to-head data show SADI-S maintains significantly greater weight loss and BMI reduction than gastric bypass out to seven years, thanks to its stronger malabsorptive component (Małczak et al., Obesity Reviews, 2025; Salama et al., Surgical Endoscopy, 2026). Gastric bypass remains the better choice when reflux is the dominant problem.

Yes. In national MBSAQIP data, sleeve-to-SADI conversion had a 30-day serious-complication rate of about 5.7% — not significantly different from a primary SADI-S and not an independent predictor of complications, with no deaths in the conversion group (Barajas-Gamboa et al., Surgical Endoscopy, 2023). Because the dissection occurs away from the scarred sleeve staple line and only one anastomosis is created, it has a favorable technical profile among conversions. The main long-term risk is nutritional, requiring strict lifelong supplementation (Ponce de Leon-Ballesteros et al., Obesity Surgery, 2024).

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Sleeve-to-SADI-S produces the greatest additional weight loss of any mainstream sleeve revision. Revisional SADI-S series report about 22–24% total weight loss maintained through five years, and conversion cohorts show excess weight loss consistently above 90% at five years, with every patient still exceeding 20% total weight loss at that point (Esparham et al., SOARD, 2026; El-On et al., Obesity Surgery, 2026). Individual results depend on starting BMI, common-channel length, and adherence.

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SADI-S bypasses the duodenum and upper small intestine, so lifelong deficiencies of fat-soluble vitamins (A, D, E, K), iron, calcium, B12, folate, and zinc are possible, along with a 3–10% risk of protein-calorie malnutrition depending on common-channel length — which is why strict supplementation and monitoring are mandatory (Ponce de Leon-Ballesteros et al., Obesity Surgery, 2024; Noel et al., J Laparoendosc Adv Surg Tech, 2026). SADI-S does not reliably fix reflux, so patients with significant GERD are generally better served by a gastric bypass instead (Barajas-Gamboa et al., Surgical Endoscopy, 2023).

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A MagDI (magnetic duodeno-ileostomy) creates the same kind of malabsorptive duodeno-ileal bypass as a SADI-S, but instead of cutting and stapling the bowel, it uses two magnets placed endoscopically and aligned laparoscopically to form a sutureless side-to-side anastomosis that develops gradually over several weeks, after which the magnets pass naturally (Gagner et al., SOARD, 2024; Cadière et al., J Gastrointest Surg, 2024). The goal is to lower the risk of leak, bleeding, and stricture. The key difference is evidence: SADI-S has mature 5-year data, while MagDI is new, with small numbers and short follow-up (Esparham et al., SOARD, 2026; Chiappetta et al., Obesity Surgery, 2026).

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In the early studies, the magnetic anastomosis itself had a strong safety signal — no device-related leaks, bleeds, obstructions, infections, or deaths across the first multicenter series, and all anastomoses were patent at one year in the French feasibility study (Gagner et al., SOARD, 2024; Cadière et al., J Gastrointest Surg, 2024). However, these are small studies with short follow-up, and the malabsorptive nutritional risks of any duodeno-ileal bypass — vitamin deficiencies and possible protein malnutrition — still apply and require lifelong monitoring (Chiappetta et al., Obesity Surgery, 2026). It should be viewed as promising but investigational.

The conversion-specific data are early and modest: in the first multicenter study, patients who had a MagDI after a prior sleeve lost about 8 kg (17.4% excess weight loss) at six months, considerably less than patients who had a sleeve and MagDI together (Gagner et al., SOARD, 2024). Long-term conversion results are not yet established. For comparison, the conventional equivalent — conversion SADI-S — produces roughly 22–24% total weight loss maintained through five years (Esparham et al., SOARD, 2026).

The best candidates are patients who had Roux-en-Y gastric bypass and are regaining weight (or never lost enough) because the outlet between the pouch and intestine has stretched — typically to 25 mm or more — and who are committed to long-term follow-up (Jirapinyo et al., Gastrointestinal Endoscopy, 2020; Vansteenbrugge et al., Obesity Surgery, 2023). It also treats dumping syndrome from a dilated outlet. TORe is not appropriate if the outlet is already narrow, if there is an active marginal ulcer, or if there is a large hiatal hernia (Reicher et al., Obesity Surgery, 2023).

On average, patients lose about 8.9% of total body weight at 12 months, and roughly 7–9% is maintained through 3–5 years in the largest long-term series (Jirapinyo et al., Gastrointestinal Endoscopy, 2025; Jirapinyo et al., Gastrointestinal Endoscopy, 2020). Results improve substantially with technique and adjuncts: a purse-string suture pattern achieves about 12.8% total weight loss, and combining TORe with anti-obesity medication yields about 15.2% at one year (Jirapinyo & Thompson, Gastrointestinal Endoscopy, 2023).

Lorem Ipsum

Varies by procedure, typically 1–3 weeks.

Yes — common revisions include sleeve → bypass or sleeve → SADI-S.

Yes — band removal with conversion is one of the most common revisions.