Anti-Reflux Surgery (Nissen Fundoplication)

Introduction

If you have been living with chronic acid reflux, or if your doctor has found a hiatus hernia that is causing ongoing symptoms, you may have reached the point where surgery is being discussed. Anti-reflux surgery — most often a procedure called a Nissen fundoplication — is an operation designed to stop stomach contents from flowing backwards into the oesophagus (the food pipe). It is one of the most established operations in surgical gastroenterology and has been performed for several decades.

This article is written for people who already have a diagnosis of gastro-oesophageal reflux disease (GERD, sometimes written as GORD) or a related condition, and who are now thinking about what the operation involves, how it compares to other options, and what life looks like afterwards. It is not a guide to recognising reflux for the first time. The aim is to help you understand the decision points your surgeon will discuss with you, so the conversation in clinic is easier to follow.

Reflux surgery has changed considerably over the years. Open operations through a large incision are now uncommon for most patients; keyhole (laparoscopic) and robotic-assisted approaches are the standard in most centres. The operation itself has also been refined, and surgeons now choose between a full wrap (Nissen) and partial wraps depending on what suits your anatomy and swallowing function best.

What Is Anti-Reflux Surgery?

Anti-reflux surgery is a group of operations that aim to restore the natural barrier between the stomach and the oesophagus. In a healthy person, a ring of muscle at the bottom of the oesophagus — called the lower oesophageal sphincter — tightens after food passes into the stomach, keeping stomach acid and contents from flowing back up. When this barrier is weak, or when the upper part of the stomach slides through the diaphragm into the chest (a hiatus hernia), reflux can become frequent and damaging.

The most commonly performed anti-reflux operation is the Nissen fundoplication. In this procedure, the surgeon wraps the upper part of the stomach (the fundus) all the way around the lower oesophagus — a full 360-degree wrap — and stitches it in place. This creates a new valve that resists reflux. If you have a hiatus hernia, the surgeon also pulls the stomach back down into the abdomen and tightens the opening in the diaphragm (the hiatus) before performing the wrap.

Partial wraps are also performed. A Toupet fundoplication wraps the stomach around the back of the oesophagus by about 270 degrees, and a Dor fundoplication covers the front by about 180 degrees. These partial wraps are gentler on swallowing and are often chosen for people whose oesophagus does not move food well.

The term “fundoplication” simply means folding the fundus of the stomach — it is used as a general label for any of these wrap-type operations.

Why Is Anti-Reflux Surgery Performed?

Surgery is not the first treatment for reflux. Most people are managed with lifestyle changes and acid-suppressing medications, particularly proton pump inhibitors (PPIs) such as omeprazole or pantoprazole. Surgery becomes a serious consideration when one or more of the following situations apply.

Symptoms that medications cannot fully control

Some people continue to have heartburn, regurgitation, or chest discomfort even on optimal doses of acid-suppressing medication. Regurgitation — the sensation of food or fluid rising back into the throat — is one of the symptoms least likely to respond to medication, because medication reduces acid but does not prevent the physical backflow.

Reluctance to take long-term medication

Some people are advised to take acid-suppressing medication for many years, or for life. Concerns about long-term PPI use — including effects on bone density, vitamin and mineral absorption, and the kidneys — are discussed actively in the medical community. The actual risks are debated and for most people are modest, but for younger patients facing decades on medication, surgery can be an option to consider.

Complications of long-term reflux

Chronic reflux can damage the lining of the oesophagus. This may cause inflammation (oesophagitis), narrowing (stricture), or a condition called Barrett’s oesophagus, where the cells of the lower oesophagus change in response to acid exposure. Barrett’s carries a small but real risk of progressing to oesophageal cancer over time. Surgery may be discussed in selected cases, although it does not by itself remove the cancer risk and ongoing surveillance is still needed.

Hiatus hernia

A hiatus hernia is when part of the stomach pushes up through the diaphragm into the chest. Small sliding hiatus hernias are common and often cause no problems beyond reflux. Larger hernias, particularly paraoesophageal hernias where a large part of the stomach sits in the chest, can cause swallowing difficulty, chest pain, anaemia from a chronically irritated stomach lining, or, rarely, dangerous twisting of the stomach. Surgery is often recommended for symptomatic large hiatus hernias even when reflux is not the dominant symptom.

Atypical or extra-oesophageal symptoms

Some people have symptoms that may be linked to reflux but happen outside the food pipe — a chronic cough, hoarseness, sore throat, dental erosion, or asthma that is hard to control. The link between these symptoms and reflux is not always clear-cut, and surgery in this group requires careful selection. Major societies such as the American College of Gastroenterology emphasise objective testing before considering surgery for atypical symptoms.

Who Is a Candidate?

Not everyone with reflux is a good candidate for surgery. Surgeons and gastroenterologists generally look at several factors before recommending the operation.

Objective evidence of reflux

Current professional guidance from societies including SAGES and the ACG recommends that, before surgery, there should be objective evidence that reflux is actually occurring. This usually involves:

• Upper endoscopy (gastroscopy): a thin camera passed through the mouth into the stomach to look for inflammation, ulcers, stricture, Barrett’s changes, or a hiatus hernia.
• Ambulatory pH testing: a small probe or capsule that measures acid exposure in the oesophagus over 24 to 96 hours.
• Oesophageal manometry: a test that measures how well the muscles of the oesophagus contract and how well the lower sphincter works. This is particularly important before surgery because it helps decide whether a full or partial wrap is more suitable.
• Barium swallow: a contrast X-ray that shows the size and type of any hiatus hernia and how food moves through the oesophagus.

These tests help confirm that surgery is being offered for the right reason and that the underlying anatomy and function are well understood.

Response to acid-suppressing medication

Interestingly, a good response to PPIs is often seen as a positive sign that surgery will help, because it suggests the symptoms really are driven by reflux. A poor response to PPIs does not rule out surgery, but it does mean the team will look more carefully at whether reflux is genuinely the cause.

Other conditions that may affect the decision

Significant obesity changes the calculation. In people with a high BMI, weight-loss (bariatric) surgery — particularly a Roux-en-Y gastric bypass — often relieves reflux as well as supporting weight loss, and may be discussed instead of a fundoplication.

Other conditions that affect candidacy include severe lung or heart disease (which raises operative risk), advanced motility disorders such as achalasia (where a fundoplication is generally avoided or modified), and previous abdominal surgery that may complicate the procedure.

Alternatives to Surgery

Anti-reflux surgery is one option on a wider spectrum. A thorough discussion of alternatives is an important part of the decision.

Lifestyle and dietary changes

Several adjustments are known to reduce reflux for many people:

• Losing weight if you carry excess weight around the abdomen
• Raising the head of the bed by 10 to 15 cm (not just using extra pillows)
• Avoiding eating in the three hours before lying down
• Reducing alcohol, smoking, and large fatty meals
• Identifying personal trigger foods (for some people, coffee, chocolate, citrus, tomato, or mint)

These changes are usually tried alongside medication and continue to be useful after surgery.

Medications

Acid-suppressing medications remain the cornerstone of medical treatment.

• Proton pump inhibitors (PPIs) are the most powerful acid suppressors and are first-line for moderate-to-severe reflux.
• H2-receptor blockers such as famotidine are weaker but useful, particularly for night-time symptoms.
• Antacids and alginate-containing preparations can give quick relief for occasional symptoms.
• Prokinetic agents are sometimes added when delayed stomach emptying is a factor.

Endoscopic procedures

Several procedures performed during endoscopy — without external cuts — have been developed as middle-ground options. They include transoral incisionless fundoplication (TIF) and radiofrequency treatment of the lower sphincter (sometimes called Stretta). Major societies describe these as options for carefully selected patients, particularly those with no or small hiatus hernias and milder disease. Long-term durability is less established than for surgical fundoplication.

Magnetic sphincter augmentation

This is a relatively newer option in which a small ring of magnetic beads is placed around the lower oesophagus laparoscopically. The beads pull together to keep the sphincter closed and open when you swallow. Outcomes in selected patients are similar to fundoplication in shorter-term studies. Availability varies between centres and countries.

Weight-loss surgery

As noted above, for people with significant obesity and reflux, a Roux-en-Y gastric bypass may be discussed as an alternative that addresses both problems.

Whether any alternative is appropriate is a clinical decision made with your gastroenterologist and surgeon based on your tests, symptoms, anatomy, and preferences.

Surgical Approaches

The Nissen fundoplication and its partial-wrap variants can be performed through several approaches. The choice depends on your anatomy, previous surgeries, the surgeon’s experience, and the equipment available at the hospital.

Laparoscopic (keyhole) anti-reflux surgery

This is the most common approach today. The surgeon makes four to five small cuts (each less than 1 cm) in the upper abdomen. A camera and long thin instruments are passed through these cuts, and the operation is performed while the surgeon watches a high-definition screen. The advantages of the laparoscopic approach include less pain, a shorter hospital stay, faster return to normal activities, and smaller scars compared with open surgery. For most patients with uncomplicated GERD or hiatus hernia, this is the default approach in current practice.

Robotic-assisted anti-reflux surgery

Robotic surgery is a form of laparoscopic surgery where the surgeon controls the instruments from a console next to the operating table. The robotic system provides three-dimensional vision and instruments that bend like a wrist, which can help with the fine stitching of the wrap and in tight spaces near the diaphragm. The patient’s experience of robotic surgery is very similar to standard laparoscopic surgery in terms of incisions, pain, and recovery. The strongest case for the robotic approach is often made for complex hiatus hernias and revision (repeat) surgery; for routine cases, results are broadly comparable between laparoscopic and robotic approaches.

Open anti-reflux surgery

Open surgery involves a single larger incision in the upper abdomen. It is now uncommon as a first operation and is mainly reserved for situations where keyhole surgery is not safe or not possible — for example, severe scarring from previous surgery, very large or unusual hiatus hernias, or when complications arise during a laparoscopic operation and the surgeon needs to convert. Recovery is longer than after keyhole surgery.

Choice of wrap: full versus partial

Once the abdomen is entered, the next decision is the type of wrap.

• A Nissen (360-degree) wrap provides the strongest anti-reflux barrier and is the most studied. It is often chosen when the oesophagus moves food normally.
• A Toupet (270-degree posterior) wrap gives good reflux control with less swallowing difficulty afterwards. It is often chosen for people whose oesophagus has weak or disordered contractions on manometry.
• A Dor (180-degree anterior) wrap is most commonly performed alongside other operations, such as a Heller myotomy for achalasia, or where minimal additional resistance is wanted.

The decision is made in advance based on testing and is sometimes adjusted during surgery depending on what the surgeon finds.

Preparing for Anti-Reflux Surgery

Preparation begins weeks before the operation. Your surgical team will guide the specifics, but the broad steps are similar across centres.

Pre-operative testing

Before surgery is scheduled, you will typically have completed the diagnostic workup described earlier — endoscopy, pH testing, manometry, and often a barium swallow. Blood tests, an electrocardiogram, and sometimes a chest X-ray are done close to the date of surgery to check fitness for anaesthesia. People with other medical conditions may need additional reviews, such as a cardiology or respiratory assessment.

Medication review

Some medications need to be stopped or adjusted before surgery. Blood thinners such as warfarin, clopidogrel, and direct oral anticoagulants are typically paused under medical guidance. People with diabetes need a plan for managing their blood sugar and medications around fasting. You will usually be asked to continue your PPI until surgery.

Lifestyle preparation

Stopping smoking, even for a few weeks before surgery, reduces the risk of chest infections and helps wound healing. If you have been advised to lose weight before surgery, the team will give specific targets and timelines.

The day before and the day of surgery

You will be asked to fast — no food for several hours before surgery, and usually only sips of clear fluids until a few hours before. The exact instructions are given by the anaesthetic team and should be followed precisely, as eating or drinking late can lead to the surgery being postponed for safety.

Some surgeons ask for a few days of a liquid or low-residue diet before surgery to make the stomach easier to handle, particularly for large hiatus hernias. Showering with antiseptic soap on the morning of surgery may be requested.

What Happens During Anti-Reflux Surgery

Understanding what actually happens in the operating room can help with both consent and anxiety.

Anaesthesia

Anti-reflux surgery is performed under general anaesthesia. You are fully asleep and do not feel or remember the operation. A breathing tube is placed once you are asleep. The anaesthetist monitors you throughout.

Positioning and access

You are usually positioned on your back, often with the legs slightly apart or in stirrups, and the table tilted head-up. The abdomen is cleaned and draped. For a laparoscopic or robotic approach, carbon dioxide gas is gently used to inflate the abdomen, creating space for the surgeon to work. Small cuts (ports) are made for the camera and instruments.

The key steps of the operation

1. Assessing the anatomy. The surgeon inspects the lower oesophagus, the diaphragm, the stomach, and any hernia.
2. Reducing a hiatus hernia. If part of the stomach is in the chest, it is gently pulled down into the abdomen.
3. Mobilising the oesophagus. Enough length of oesophagus is freed up so that it sits comfortably below the diaphragm without tension.
4. Repairing the hiatus. The opening in the diaphragm is tightened with stitches. In some cases — particularly for large hernias — a mesh reinforcement is used, although this is a topic of ongoing discussion among surgeons.
5. Preparing the fundus. Short blood vessels between the stomach and spleen may be divided so the fundus can be brought around the oesophagus without tension.
6. Creating the wrap. The fundus is wrapped around the lower oesophagus — fully for a Nissen, partially for a Toupet or Dor — and held in place with stitches. A flexible tube may be passed down the oesophagus during this step to make sure the wrap is not too tight.
7. Final checks. The surgeon confirms the wrap sits correctly, there is no bleeding, and the diaphragm repair is intact. The carbon dioxide is released, and the small cuts are closed with stitches or surgical glue.

Recovery and Healing

Recovery after anti-reflux surgery unfolds in phases. Your team will give you a detailed plan; the outline below describes what most people experience.

The first 24 to 48 hours

After laparoscopic or robotic surgery, you usually wake up in the recovery area with some discomfort in the upper abdomen and sometimes a sensation in the shoulder — this is referred pain from the carbon dioxide gas used during surgery and settles within a day or two. You may have a urinary catheter for a short period.

You will be encouraged to sit up, breathe deeply, and walk on the same day or the following morning. Early movement reduces the risk of blood clots and chest infections.

Eating after surgery

This is one of the most important parts of recovery and one of the most asked about. Because the area around the lower oesophagus is swollen, swallowing solid food too early can cause food to stick. Most centres use a staged approach over several weeks:

• First few days: clear liquids, then full liquids
• Weeks 1 to 2: pureed or very soft foods
• Weeks 2 to 4: soft solids, eating slowly and chewing well
• After 4 to 6 weeks: gradual return to a normal diet

You will be advised to eat smaller portions, chew thoroughly, avoid carbonated drinks for a while (because trapped gas can be uncomfortable when burping is more difficult), and avoid foods that easily stick — bread, tough meat, and dry rice are common culprits in the early weeks. The exact timeline varies between surgeons.

Hospital stay

Most people having a routine laparoscopic Nissen go home within 1 to 2 days. Some centres now use enhanced recovery protocols where same-day discharge is possible for selected patients. Open surgery and complex hernia repairs usually involve longer stays.

Pain control and activity

Pain after keyhole surgery is generally moderate and is controlled with simple painkillers such as paracetamol and short courses of stronger medication if needed. You can usually walk around the house from day one, but heavy lifting (typically anything above 5 kg) is avoided for around 4 to 6 weeks to allow the diaphragm repair to heal. Driving is usually resumed once you can perform an emergency stop without discomfort — often within 1 to 2 weeks for keyhole surgery.

Returning to work

People with desk-based work often return within 2 to 3 weeks; those with physically demanding jobs may need 4 to 6 weeks or longer. Your surgeon will give individual guidance.

Common early experiences

In the first weeks, many people notice:

• Difficulty swallowing (dysphagia), especially with solids. This is expected and usually improves over the first 6 to 12 weeks as swelling settles.
• Inability to burp and a sense of fullness or bloating, sometimes called gas-bloat syndrome. This often improves over time but can persist to some degree.
• Increased flatulence, because air that would have been burped is passed instead through the lower digestive tract.
• Feeling full quickly at meals.

Risks and Complications

Anti-reflux surgery is generally safe in experienced hands, but as with any operation, there are risks. Discussing these in detail with your surgeon is an essential part of consent.

General surgical risks

These apply to most abdominal operations and include:

• Bleeding
• Infection of wounds or inside the abdomen
• Blood clots in the legs or lungs
• Chest infection
• Reactions to anaesthesia

Specific risks of anti-reflux surgery

• Persistent difficulty swallowing. Some swallowing difficulty is expected and usually improves. In a small number of people it persists and may need treatment with endoscopic stretching (dilatation) of the lower oesophagus.
• Gas-bloat syndrome. An inability to burp easily, with associated bloating, can be bothersome and tends to be more common after a full Nissen wrap than after partial wraps.
• Slipped or disrupted wrap. The wrap can occasionally come undone or slip, leading to return of reflux or new symptoms. Heavy lifting or severe vomiting in the early weeks increases this risk.
• Recurrent hiatus hernia. The diaphragm repair can stretch or tear over time, particularly after large hernia repairs. This is one of the most common long-term issues.
• Injury to nearby structures. The oesophagus, stomach, spleen, liver, or major blood vessels can be injured during surgery. Such complications are uncommon but can be serious.
• Vagus nerve injury. The vagus nerves run alongside the oesophagus and control stomach emptying. Injury can lead to delayed gastric emptying, with nausea or bloating after meals.
• Recurrence of reflux. Over years, some people experience return of reflux symptoms and may need to restart medication.
• Need for revision surgery. A minority of people need a second operation, either for recurrent reflux, persistent dysphagia, or a recurrent hernia. Revision surgery is technically more demanding and is best done in centres with experience in it.

Overall, most patients who have anti-reflux surgery in experienced hands have good long-term symptom control and are satisfied with the result. Studies suggest that the great majority no longer need regular acid-suppressing medication after surgery, although a meaningful minority do return to it over the years.

Life After Anti-Reflux Surgery

Long-term life after a fundoplication is, for most people, much like life before reflux became a problem — with a few adjustments worth knowing about.

Eating and drinking

Once you have moved past the early dietary stages, most people can eat a full normal diet. Some find that they prefer smaller, more frequent meals and that they need to chew more carefully than before. Carbonated drinks may continue to cause more bloating than they used to.

Burping and vomiting

The wrap is designed to be a one-way valve. Burping is often more difficult, and forceful vomiting is harder — both because of the same anatomy. This is usually a minor adjustment, but it is worth knowing about if, for example, you have a stomach upset and feel the urge to vomit.

Return of symptoms

If heartburn or regurgitation returns months or years later, it is worth getting reviewed rather than assuming you simply need to restart medication. Sometimes the same symptoms can be due to a slipped wrap or recurrent hernia, and the treatment depends on the cause.

Surveillance for Barrett’s oesophagus

If you had Barrett’s oesophagus before surgery, you will still need regular endoscopic surveillance afterwards. The surgery controls reflux but does not eliminate the small cancer risk associated with the underlying cellular changes.

Long-term outcomes

Long-term studies suggest that most patients maintain good reflux control years after surgery. Outcomes are generally best when the operation is done by surgeons who perform it regularly and on patients who have been carefully selected with objective testing. Your surgeon can give you a sense of expected outcomes based on your own situation.

Anti-Reflux Surgery in Children

Children can also have severe reflux, and a small number need surgery. Paediatric anti-reflux surgery is most commonly considered in children with:

• Severe reflux that does not respond to medication and is causing failure to gain weight, recurrent vomiting, or damage to the oesophagus
• Neurological conditions such as cerebral palsy, where reflux can be severe and lead to recurrent chest infections
• Reflux associated with significant breathing problems or recurrent aspiration into the lungs
• Large or symptomatic hiatus hernias, including congenital ones

A laparoscopic Nissen or partial fundoplication is the most common operation, often combined with a feeding tube (gastrostomy) in children who cannot eat enough by mouth. Decisions are made by paediatric surgeons in close coordination with paediatricians, gastroenterologists, and often neurology or respiratory teams. Recovery in children follows broadly similar phases to adults, adapted for age and the specific condition. Long-term outcomes are generally favourable, although wrap loosening or recurrent reflux can happen as children grow.

Frequently Asked Questions

Will I still need to take acid medication after surgery?

Many people stop their PPI after surgery, often within weeks. A meaningful number eventually restart medication, either because reflux symptoms return or because the team uses medication for other reasons. This is something your surgeon will review with you at follow-up.

Can I drink alcohol or have spicy food again?

Once you have fully recovered, most people can return to a wide range of foods and drinks. Some find that very fizzy drinks continue to cause bloating, and some prefer to avoid foods that previously triggered reflux out of habit. There is no fixed list of forbidden foods after a fundoplication.

How long does the wrap last?

For most people, the wrap continues to function well for many years. A minority experience loosening, slipping, or recurrent hiatus hernia over time. Long-term studies report durable symptom control in the majority of patients followed for ten years or more, though some need further treatment along the way.

Can I have an MRI or other scans after surgery?

Yes. The stitches used inside the abdomen are not affected by MRI, and routine imaging is safe.

What if I become pregnant after surgery?

Pregnancy is not a problem after a fundoplication. Some women notice that the changes of late pregnancy can bring back mild reflux, which usually settles after delivery.

How will I know if the wrap has come undone?

The most common sign is the return of typical reflux symptoms — heartburn, regurgitation, or chest discomfort. New persistent difficulty swallowing or severe bloating can also be a sign of a problem with the wrap. A return visit to your surgeon, with endoscopy or imaging if needed, can clarify what is happening.

Is robotic surgery better than laparoscopic surgery for this operation?

Robotic-assisted and conventional laparoscopic anti-reflux surgery produce broadly similar results for most patients. Robotic techniques may offer advantages in complex or revision cases, where the precise control and three-dimensional view can help. The surgeon’s experience with their preferred technique is generally more important than the technology itself.

What is the difference between a Nissen and a Toupet fundoplication?

A Nissen is a full 360-degree wrap of the stomach around the oesophagus. A Toupet is a partial wrap of about 270 degrees, leaving part of the oesophagus exposed at the front. The Toupet is often chosen for people whose oesophagus does not move food strongly, because it is less likely to cause swallowing difficulty afterwards.

Conclusion

Anti-reflux surgery, in the form of a Nissen fundoplication or one of its partial-wrap variants, is a well-established option for people whose reflux or hiatus hernia is significantly affecting their lives despite medical treatment. It is not the first step for most people with reflux, but for the right candidate it can provide durable control of symptoms and freedom from long-term daily medication.

The decision involves more than just the diagnosis of reflux. It depends on objective evidence of acid exposure, on how well your oesophagus moves food, on the size of any hernia, on your overall health, and on what matters most to you about your future. A careful conversation with both a gastroenterologist and a surgeon experienced in this operation is the foundation of a good decision.

Whether you are at the stage of considering surgery or planning a date for the operation, understanding what the procedure involves — the approaches, the recovery, the trade-offs, and the long-term outlook — can help you take part in that decision with confidence.