Bariatric surgery revisions in the U.S. have more than tripled, rising from fewer than 10,000 procedures in 2011 to more than 32,000 in 2023, according to estimates from the American Society for Metabolic and Bariatric Surgery.

That increase might sound concerning, especially if you’ve had weight-loss surgery or are considering it. However, it doesn’t mean bariatric surgery doesn’t work — on the contrary. In fact, it shows how much doctors have learned about obesity and its treatment.

Just think about GLP-1 medications. Ten years ago, hardly anyone outside of diabetes care had even heard of them, whereas today, it’s estimated that 1 in 8 U.S. adults have taken one. But the connection between GLP-1s and weight loss isn’t new. It’s now known that certain bariatric procedures can actually increase the body’s natural GLP-1 response after eating — no medication needed.

“Doctors now know that successful bariatric surgery isn’t just about making the stomach smaller,” says Dr. Kyle Stephens, a bariatric surgeon and board-certified obesity medicine specialist at Houston Methodist. “It’s also about changing the hormonal and metabolic signals that influence hunger, fullness and weight regulation.”

That understanding has reshaped bariatric surgery, shifting the field away from procedures that rely mainly on restriction and toward those that act on hormones influencing hunger, appetite and fullness.

This also helps explain why some patients need a second look at a procedure they had years ago. They may be experiencing weight regain or reflux or are living with an operation doctors rarely perform today.

Today, surgeons have more ways to help than ever.

Which bariatric procedures fell out of favor?

Vertical banded gastroplasty and the adjustable gastric band, better known as LAP-Band, are two examples of procedures that once played a much larger role in bariatric surgery but aren’t really performed very much — if at all.

Vertical banded gastroplasty

Vertical banded gastroplasty, or VBG, used staples and a small band to create a pouch at the top of the stomach. Food had to pass through a narrow opening into the rest of the stomach, which limited how much a person could comfortably eat at one time.

That narrow opening sometimes made nutritious foods, including raw vegetables and lean meats, difficult or uncomfortable to eat while allowing softer, highly processed foods to pass through more easily. Since those foods often pack more calories into a smaller amount, patients could consume enough calories to regain weight even while the procedure continued to restrict how much they could eat at once.

“We learned that purely restrictive procedures don’t tend to work as well long term because patients can eventually work around those restrictions,” Dr. Stephens says.

Other problems could emerge years later. The staple lines could potentially open, allowing food to bypass the small pouch and pass through more of the stomach. Patients could also develop reflux or trouble swallowing as food backed up above the narrowed opening.

Many VBGs were also performed through large, open incisions, which could leave more scar tissue for a surgeon to navigate if a patient eventually needed another operation.

Adjustable gastric band

LAP-Band took a different approach. Instead of stapling the stomach, surgeons placed an inflatable silicone band around its upper portion. They could add or remove fluid through a small port under the skin to adjust how tightly the band restricted food.

This procedure became popular partly because surgeons could place it through small incisions and adjust or remove it later. However, like VBG, it relied primarily on restriction and presented many of the same long-term challenges.

Over time, doctors found that LAP-Band produced less reliable weight loss than other bariatric procedures. The band could also slip, erode into the stomach or contribute to reflux and problems with the esophagus.

Molina band

Some Houston-area patients may have a procedure known as the Molina band, a variation of restrictive surgery that uses a mesh band around the stomach. The operation originated locally, so Dr. Stephens says bariatric surgeons in Texas may still encounter patients who had one. However, revisions can sometimes be particularly complex due to potential scar tissue or altered anatomy caused by the mesh.

Having one of these procedures doesn’t mean you’ll eventually need a revision. In fact, many patients continue to do well and may never need any other operation.

But just as many surgeries have shifted from large, open procedures to laparoscopic (minimally invasive) and robotic techniques, these procedures have fallen out of common practice as surgeons gained better options and more long-term evidence.

When should you revisit a previous bariatric surgery?

A previous bariatric procedure may deserve another look if you’re gaining weight again, struggling with reflux or noticing changes in how comfortably you can eat.

Weight regain after bariatric surgery

Weight regain is the most common reason patients return to Dr. Stephens after bariatric surgery.

Some weight regain doesn’t necessarily mean the original procedure has failed. After all, obesity is a chronic disease and is caused by many factors. However, it may be worth returning to a bariatric specialist if your weight continues to increase or begins reversing some of the health improvements you experienced after surgery.

“People can get frustrated,” says Dr. Stephens. “They had the surgery, lost weight and then regained it. They may try medication without getting the results they want and start thinking there’s nothing else they can do.”

Reflux, regurgitation or trouble swallowing

Reflux is another common reason patients seek help, particularly after sleeve gastrectomy, a procedure that involves removing part of the stomach to create a long, narrow “sleeve.”

Occasional heartburn happens to many people, but daily reflux after bariatric surgery is different. You may experience frequent burning, regurgitation, trouble swallowing or the feeling that food gets stuck. You may also wake up coughing or choking after stomach contents travel back into your throat while you sleep.

“We can underestimate how much daily reflux affects someone’s life,” says Dr. Stephens. “You can’t sleep. You’re waking up at night feeling like you’re choking. It can be really disruptive.”

Persistent reflux can also inflame the esophagus. Over time, it may contribute to Barrett’s esophagus, a precancerous change in the esophageal lining, or aspiration (when stomach contents enter the lungs).

“When reflux comes from a mechanical problem, medications can reduce acid production, but they can’t stop stomach contents from coming back up,” says Dr. Stephens. “If a patient is experiencing significant regurgitation or trouble swallowing, that may require a procedural or surgical solution.”

(Related: When to See a Doctor for Heartburn)

None of these concerns automatically means you’ll need another operation. Instead, the first step when patients experience these symptoms is to figure out whether the problem stems from nutrition, medication, the original procedure or a change in anatomy. From there, treatment can follow the cause.

Can GLP-1 medications help after bariatric surgery?

For patients experiencing weight regain after bariatric surgery, GLP-1 medications may help patients lose additional weight or regain some of the ground they’ve lost since their original procedure.

“Medications are here to stay, and they’re part of our practice now,” says Dr. Stephens. “For someone who comes in with weight regain, medication will probably be the first place we start.”

How well that approach works depends on the person. You may not lose as much weight as you hoped, or you may have trouble tolerating the medication or getting insurance to cover it. And because weight often returns after someone stops taking a GLP-1, patients may need to think of it as a long-term treatment.

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GLP-1 medications are better suited to treating weight regain than structural problems related to the original procedure. They also slow the movement of food through the stomach, which may worsen reflux for some patients.

What do bariatric revisions actually involve?

The word “revision” can make it sound as though surgeons repeat the original operation or repair something that went wrong. In reality, many revisional bariatric surgeries involve converting one procedure into another that better suits a patient’s current needs.

“Even the terminology has changed over the years,” says Dr. Stephens. “We used to call these revisions. Now, we often call them conversions.”

What that conversion involves depends on the original procedure and the problem doctors need to address.

Converting an older procedure

Surgeons often convert older restrictive procedures, including VBG and LAP-Band, to gastric bypass.

A gastric bypass creates a new, smaller stomach pouch and connects it directly to the small intestine. Food then skips most of the stomach and the first part of the small intestine, limiting how much someone can eat while also changing the hormonal signals involved in hunger and fullness.

For someone with an adjustable gastric band, the conversion typically involves removing the band and performing the bypass procedure. VBG can also be converted to gastric bypass; however, the staples, scar tissue and anatomy left by the original surgery can potentially make the operation more complex.

Converting a gastric sleeve

For patients who previously had sleeve gastrectomy, the right conversion often depends on why they returned.

If reflux is the main concern, surgeons may convert the sleeve to gastric bypass. The sleeve already forms a long, narrow stomach, so the surgeon divides part of it to create the smaller pouch used in gastric bypass and then reroutes the intestines.

If weight regain is the primary concern, Dr. Stephens may convert the sleeve to single-anastomosis duodeno-ileal bypass, or SADI — an operation that builds on the existing sleeve by rerouting part of the small intestine to produce a stronger metabolic effect.

Revising a gastric bypass

Not every revision requires abdominal surgery. Some patients who regain weight after gastric bypass may qualify for an endoscopic procedure called a transoral outlet reduction — or TORe.

Over time, the opening between the stomach pouch and small intestine can widen, allowing food to pass through more quickly and shortening how long a patient feels full. During TORe, a doctor guides a flexible tube with a camera through the mouth and places sutures around the opening to make it smaller again.

“The TORe is a good option for weight regain after bypass,” says Dr. Stephens. “You’re not going to have the dramatic weight loss you had with your initial bypass, but it can help restore that restriction.”

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What if your first bariatric procedure fell short?

Experiencing weight regain, reflux or another concern after bariatric surgery may leave you questioning whether another treatment will make a difference. Those concerns can feel especially heavy after you’ve already committed to surgery, changed how you eat and worked to maintain your results.

But the options available today may look very different from those offered when you had your first procedure.

Bariatric surgery has become significantly safer and more refined over the past 20 years, according to Dr. Stephens. Surgeons now receive specialized fellowship training and have decades of long-term research to help determine which procedures may work best for different patients.

Revisional surgery requires careful planning, though. Previous staples, scar tissue and changes in anatomy can make the operation more complex than a first-time procedure. That’s why surgeons evaluate the original operation, current anatomy, symptoms and health goals before recommending what comes next.

Whatever that recommendation may look like, long-term follow-up remains part of the treatment. Medication, nutrition, activity and regular monitoring can all help patients maintain the benefits of a previous surgery or conversion.

“If one procedure didn’t work as well as you hoped, that doesn’t mean a different procedure won’t,” says Dr. Stephens. “People can get frustrated and think, ‘There’s nothing I can do.’ But a lot of times, these revisions can help.”