Specialised Revisional Care

Revisional Weight Loss & Metabolic Surgery

Advanced options when previous weight loss surgery has not achieved the desired long-term result.

Weight recurrence after bariatric surgery does not mean you have failed. Obesity is a chronic biological disease. Hormones, metabolism, appetite regulation and the body’s defence of weight can change over time. The anatomy and effectiveness of a previous weight-loss operation can also change.

For some patients, revisional metabolic surgery can provide a powerful second step.

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The Right Revision Depends on the Problem

Which Revision Is Right for You?

The best revisional operation depends on what operation you previously had and why you need a revision.

01
SLEEVE + WEIGHT REGAIN

Sleeve → SADI-S

Principal pathway when inadequate weight loss or significant weight recurrence is the main problem.

02
SLEEVE + REFLUX / HIATUS HERNIA

Sleeve → Roux-en-Y Gastric Bypass

Often preferred when significant reflux, hiatus hernia, oesophagitis, Barrett’s or sleeve anatomy is the dominant issue.

03
PREVIOUS GASTRIC BAND

Band → Roux-en-Y Gastric Bypass

Main definitive revision pathway after failed, complicated or poorly tolerated adjustable gastric banding.

Revision After Sleeve Gastrectomy

When Weight Returns After a Sleeve

Sleeve Gastrectomy is an effective operation, but some patients experience insufficient weight loss or significant weight recurrence over subsequent years.

This can occur because of a combination of biological and anatomical factors.

  • Hormonal adaptation.
  • Increased hunger or reduced satiety.
  • Metabolic adaptation.
  • Progressive sleeve dilatation.
  • Changes in eating tolerance.
  • Medications or medical conditions affecting weight.
  • The chronic and relapsing biology of obesity.

When further surgery is appropriate, the objective is not simply to make the stomach smaller again. The aim is to add a more powerful metabolic mechanism to the existing operation.

Sleeve → SADI-S

A Powerful Second-Stage Weight Loss Operation

SADI-S – Single Anastomosis Duodeno-Ileal Bypass with Sleeve Gastrectomy – is one of the most powerful metabolic and weight-loss operations available.

For someone who has already undergone a Sleeve Gastrectomy, an important part of the SADI-S operation has already been performed.

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The existing sleeve is retained.

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The duodenum immediately beyond the stomach is divided and connected further downstream in the small intestine.

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This adds a powerful intestinal and metabolic component to the existing sleeve.

Why SADI-S After Sleeve?

SADI-S may be particularly attractive for patients with:

  • Significant weight recurrence.
  • Inadequate initial weight loss.
  • Persistent severe obesity.
  • Type 2 diabetes.
  • Metabolic syndrome.
  • A need for greater and more durable additional weight loss.

Unlike Roux-en-Y Gastric Bypass, the pylorus – the stomach’s natural emptying valve – is preserved.

Key Anatomical Difference
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Preserving the Pylorus

SADI-S preserves the natural gastric outlet while adding a powerful intestinal and metabolic component.

Long-Term Outcomes

Powerful Weight Loss. Powerful Metabolic Effect.

80–90% Excess weight loss reported at 3–5 years in some long-term SADI-S series.
Approx. 80% Type 2 diabetes remission reported in long-term SADI-S literature; results vary.
>5 years Durable weight maintenance described in long-term follow-up after SADI-S.

These figures are evidence-informed callouts, not guarantees. Individual results depend on starting weight, duration of diabetes, pancreatic reserve, anatomy, adherence to follow-up and the definition of remission used.

Metabolic Health

More Than Weight Loss

Long-term studies report high rates of Type 2 diabetes remission after SADI-S, with figures around 80% in some long-term series. Results vary according to the population studied, duration of diabetes and definition of remission.

SADI-S also produces substantial improvement in:

  • High blood pressure.
  • Dyslipidaemia and high cholesterol.
  • Sleep apnoea.
  • Metabolic syndrome.
  • Other obesity-related conditions.
Choosing the Right Operation

Why SADI-S Rather Than Gastric Bypass?

Both operations are excellent metabolic procedures, but they have different strengths. For patients requiring substantial additional weight loss after Sleeve Gastrectomy, SADI-S can provide several advantages.

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Revision After Sleeve

SADI-S

  • Greater additional weight-loss potential in appropriately selected patients.
  • Powerful metabolic and Type 2 diabetes effect.
  • Preserves the existing sleeve.
  • Preserves the pylorus.
  • Uses one intestinal anastomosis.
  • Does not create a gastrojejunal anastomosis, so the typical Roux-en-Y Gastric Bypass marginal-ulcer site is avoided.
  • Avoids the Roux-en-Y mesenteric defects associated with internal hernias.
  • Classic dumping syndrome is much less characteristic because the pylorus is preserved.

Roux-en-Y Gastric Bypass

RYGB has a different anatomical configuration and is particularly important when reflux control is the primary objective.

For the appropriately selected patient, these features make SADI-S a particularly attractive revision when weight recurrence rather than severe reflux is the main problem.

Sleeve + Reflux / Hiatus Hernia

What About Reflux After Sleeve?

Reflux following Sleeve Gastrectomy requires careful investigation. The important question is: why is the patient experiencing reflux?

Assessment May Include

Gastroscopy and imaging may be used to determine whether there is:

  • A hiatus hernia.
  • Significant oesophagitis.
  • Barrett’s oesophagus.
  • Sleeve dilatation.
  • Sleeve angulation or stenosis.
  • Intrathoracic migration of the sleeve.
  • Another anatomical cause for reflux.
When Reflux Is the Main Problem

Sleeve + Significant Reflux or Hiatus Hernia

Roux-en-Y Gastric Bypass May Be Better

Where significant reflux is associated with a hiatus hernia, oesophagitis or an anatomical problem with the sleeve, conversion to Roux-en-Y Gastric Bypass – together with repair of the hiatus where appropriate – may provide the better revisional solution.

RYGB has an established anti-reflux effect and remains an important operation when reflux control is the primary objective.

When Weight Loss Is the Main Problem

Sleeve + Weight Regain Without Significant Hiatus Hernia

SADI-S Remains an Important Option

The presence of reflux does not necessarily exclude SADI-S in every patient. In appropriately investigated and selected patients without a significant hiatus hernia or other major anatomical cause for reflux, SADI-S may still be considered where the primary objective is substantial additional weight loss.

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The decision therefore depends on the severity and cause of reflux, anatomy of the sleeve, presence of hiatus hernia and the patient’s weight-loss requirements. The operation should be matched to the problem – not simply to the name of the previous procedure.

Revision After Gastric Band Surgery

Gastric Band → Gastric Bypass

Adjustable Gastric Banding was previously one of the most commonly performed bariatric operations in Australia.

Some patients achieved excellent results. However, longer-term problems can include:

  • Weight recurrence.
  • Inadequate weight loss.
  • Reflux and regurgitation.
  • Difficulty swallowing.
  • Oesophageal dilatation.
  • Band slippage.
  • Band erosion.
  • Port or tubing problems.
  • Band intolerance.
  • Repeated adjustments or procedures.

Why Gastric Bypass After a Band?

Gastric Bypass changes the mechanism of treatment from a primarily restrictive procedure to a powerful metabolic operation.

Further substantial weight loss.
Improved satiety.
Powerful metabolic effects.
Improvement in Type 2 diabetes.
Effective treatment of reflux in appropriately selected patients.

It can also provide a durable alternative to repeated gastric band interventions.

Surgical Planning

One Operation or Two?

Safety Comes First

01

One-Stage Revision

Some gastric bands can be removed and converted to Gastric Bypass during the same operation.

02

Staged Revision

Other patients are safer with a staged approach.

Stage 1 Remove the gastric band and allow the stomach to heal.
Stage 2 Perform the definitive Roux-en-Y Gastric Bypass once it is safer to proceed.
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Significant scarring, inflammation, erosion or other anatomical concerns may make a two-stage approach safer. The decision is made according to the findings in each individual patient.

Nutrition After SADI-S

Lifelong Follow-Up Is Essential

The same intestinal bypass that makes SADI-S such a powerful metabolic operation also reduces the absorption of some nutrients.

Patients therefore require lifelong supplementation and regular blood testing.

Protein Adequate daily protein intake is essential.
Vitamins A, D, E & K Fat-soluble vitamins require particular attention.
Iron, Calcium & Zinc Mineral levels require regular monitoring.
B12, Folate & Thiamine Other nutrients and trace elements also require monitoring.

Vitamin deficiency and protein malnutrition can occur if supplementation and follow-up are inadequate.

Lifelong nutritional monitoring should therefore be considered part of the SADI-S operation itself.

Specialist Assessment

Why Revisional Surgery Requires Experience

Revisional bariatric surgery is more complex than first-time bariatric surgery. Previous surgery changes normal anatomy and can create adhesions, scar tissue and anatomical distortion.

A specialist revisional assessment considers the complete clinical picture before recommending another procedure.

A Specialist Assessment Considers

  • The original operation.
  • Previous operative reports.
  • Weight-loss history.
  • Current BMI and metabolic health.
  • Reflux and swallowing symptoms.
  • Gastroscopy findings.
  • Hiatus hernia.
  • Current sleeve or band anatomy.
  • Nutritional status.
  • Long-term weight and health goals.
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The objective is to understand why the previous operation is no longer delivering the desired result and then choose the most appropriate revision.

At a Glance

Key Takeaways

01

Weight recurrence after bariatric surgery is not simply a failure of willpower.

02

SADI-S is a powerful revision following Sleeve Gastrectomy when additional weight loss is the main objective.

03

SADI-S provides powerful metabolic effects and high rates of Type 2 diabetes improvement and remission.

04

SADI-S preserves the pylorus and avoids the gastrojejunal anastomosis and Roux-en-Y mesenteric defects.

05

Significant reflux, particularly with a hiatus hernia or abnormal sleeve anatomy, may favour conversion to Roux-en-Y Gastric Bypass.

06

Selected patients without significant hiatus hernia or other major anatomical reflux problems may still be candidates for SADI-S.

07

Roux-en-Y Gastric Bypass is an established definitive revision following failed or complicated Gastric Band surgery.

08

Lifelong nutritional supplementation, blood tests and specialist follow-up are essential following SADI-S.

Patient Questions

Frequently Asked Questions

How much weight can I lose after SADI-S?

SADI-S is one of the most powerful metabolic weight-loss procedures available. The amount of additional weight loss following revision depends on your starting weight, previous Sleeve Gastrectomy, metabolic health and other individual factors.

Can SADI-S put Type 2 diabetes into remission?

Yes. SADI-S has a powerful metabolic effect and studies have demonstrated high rates of Type 2 diabetes improvement and remission. Long-term SADI-S literature reports remission around 80% in some series, although individual results vary according to diabetes duration, medication use, pancreatic reserve and the definition of remission.

Is SADI-S better than Gastric Bypass after a sleeve?

It depends on the reason for revision. When additional weight loss is the main objective, SADI-S may provide greater long-term weight loss in appropriately selected patients. When significant reflux is the main problem, particularly with hiatus hernia or abnormal sleeve anatomy, Roux-en-Y Gastric Bypass may be preferable.

Can I have SADI-S if I have reflux?

Possibly. Reflux should first be investigated to determine its severity and cause. In the absence of significant hiatus hernia or other major anatomical problems, SADI-S may remain an option for selected patients where additional weight loss is the primary objective.

Does SADI-S cause dumping syndrome?

Because SADI-S preserves the pylorus, food continues to leave the stomach through its natural gastric outlet. Classic dumping syndrome is therefore much less characteristic of SADI-S than Gastric Bypass.

Can SADI-S cause marginal ulcers?

SADI-S does not create the gastrojejunal anastomosis that is the typical site of a marginal ulcer following Roux-en-Y Gastric Bypass. Ulceration and other gastrointestinal complications can nevertheless occur, so it is better to describe the risk as reduced or anatomically different rather than zero.

Will I need vitamins after SADI-S?

Yes. Lifelong vitamin and mineral supplementation and regular blood testing are essential after SADI-S.

What is the usual revision after gastric band surgery?

For patients with a failed, complicated or poorly tolerated gastric band, removal of the band and conversion to Roux-en-Y Gastric Bypass is an established revisional pathway. The best timing and staging depend on the condition of the stomach and surrounding tissues.

Can band removal and Gastric Bypass be done together?

Sometimes. Some patients can have the band removed and the bypass performed in the same operation. Others are safer with a two-stage approach if there is significant scarring, inflammation, erosion or other anatomical concern.

calendar_month Considering Revisional Weight Loss Surgery?

Find the Right Pathway for You

If you have experienced weight recurrence, inadequate weight loss, reflux or complications following previous bariatric surgery, specialist assessment can determine whether another procedure may help.

Mr George Kalogeropoulos provides specialist assessment and advanced revisional bariatric surgery, including Sleeve-to-SADI-S and revision to Roux-en-Y Gastric Bypass.

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