Residency · Residency · General Surgery
Laparoscopic and Endoscopic Approaches to GERD and Hiatal Hernia
Introduction
Gastroesophageal reflux disease (GERD) is one of the most prevalent gastrointestinal conditions, affecting 20-30% of the Western population. While medical therapy with proton pump inhibitors (PPIs) is effective for most patients, surgical intervention is indicated when medical therapy fails, complications develop, or patients prefer a non-pharmacologic solution. Laparoscopic fundoplication remains the gold standard surgical treatment, and newer endoscopic and magnetic sphincter augmentation devices have expanded the therapeutic options. Understanding the pathophysiology, patient selection, operative techniques, and management of complications is essential for the general surgery resident.
Pathophysiology of GERD
Lower esophageal sphincter dysfunction is the primary mechanism and manifests as transient LES relaxations (the most common mechanism), hypotensive LES with resting pressure below 10 mmHg, and a structurally defective LES with overall length less than 2 cm or abdominal length less than 1 cm. Hiatal hernia disrupts the gastroesophageal flap valve and crural diaphragm, allowing the LES to migrate into the thorax and reducing its effectiveness as an anti-reflux barrier. Impaired esophageal body peristalsis reduces acid clearance, prolonging mucosal exposure. Gastric factors including delayed gastric emptying, increased gastric volume, and increased intra-abdominal pressure from obesity promote reflux. Esophageal hypersensitivity and functional heartburn may mimic GERD without pathologic acid exposure.
Preoperative Evaluation
Essential Studies
Upper endoscopy evaluates for esophagitis (Los Angeles classification A-D), Barrett's esophagus, stricture, mass, hiatal hernia size, and Hill grade of the GE flap valve. High-resolution esophageal manometry is mandatory before fundoplication and rules out achalasia, absent contractility, or severe hypomotility (distal contractile integral below 100 mmHg-s-cm), while also tailoring the type of fundoplication (partial for impaired motility). Ambulatory pH monitoring using 96-hour wireless Bravo or 24-hour impedance-pH is the gold standard for documenting pathologic acid exposure (percent time pH below 4, DeMeester score above 14.7); impedance adds detection of weakly acidic and non-acid reflux, and testing is performed off PPI for diagnostic purposes or on PPI for evaluation of refractory symptoms. Barium esophagram evaluates hiatal hernia size, esophageal length, motility pattern, and stricture and is especially important for large or paraesophageal hernias.
Indications for Anti-Reflux Surgery
Anti-reflux surgery is indicated for documented GERD with persistent symptoms despite optimal PPI therapy, documented GERD with desire to discontinue long-term PPI therapy, GERD with extra-esophageal manifestations (cough, asthma, laryngitis) responsive to PPI therapy, large hiatal hernia (especially paraesophageal hernia) with symptoms, GERD complications such as peptic stricture and Barrett's esophagus (though surgery does not eliminate cancer risk but may reduce progression), and volume regurgitation poorly controlled by PPIs.
Predictors of Successful Outcome
Typical symptoms such as heartburn and regurgitation predict better outcomes than atypical or extra-esophageal symptoms. Positive symptom correlation with acid exposure on pH monitoring is an important predictor. Response to PPI therapy, at least partial, is the strongest predictor of surgical success. Normal esophageal motility predicts better functional outcomes.
<image>Anatomical illustration showing the anti-reflux mechanisms at the gastroesophageal junction including the lower esophageal sphincter, crural diaphragm, His angle, and the phrenoesophageal ligament, with comparison of a normal GEJ and a Type I sliding hiatal hernia showing loss of these protective mechanisms</image>
Classification of Hiatal Hernias
Type I (sliding) hernias involve migration of the GEJ above the diaphragm, are the most common type (95%), and are associated with GERD. Type II (true paraesophageal) hernias occur when the GEJ remains in its normal position while the gastric fundus herniates through the hiatus alongside the esophagus; this type is rare in pure form. Type III (mixed) hernias involve herniation of both the GEJ and the gastric fundus through the hiatus and represent the most common type of paraesophageal hernia. Type IV hernias are large hernias containing other abdominal organs such as the colon, spleen, or small bowel in addition to the stomach. Paraesophageal hernias (Types II-IV) carry a risk of incarceration, volvulus, strangulation, and Cameron erosions with resulting anemia from mucosal ischemia. Symptomatic paraesophageal hernias should be repaired, while the management of asymptomatic large hernias is debated and watchful waiting is acceptable in elderly or frail patients.
Laparoscopic Nissen Fundoplication (360-Degree Wrap)
Patient Positioning and Port Placement
The patient is placed in the split-leg position with the surgeon between the legs, in reverse Trendelenburg of 15-20 degrees, and a liver retractor is placed through a subxiphoid port. A five-port technique is used with a camera port placed supraumbilically, two working ports at the right and left subcostal positions, a liver retractor port at the subxiphoid position, and an assistant port at the left lateral position.
Key Operative Steps
The hiatal dissection begins with division of the gastrohepatic ligament using the pars flaccida approach, identifying and preserving the hepatic branch of the anterior vagus nerve, and exposing the right crus. Crural dissection involves dissecting the right and left crura posteriorly to create a retroesophageal window, identifying and preserving both vagus nerves, and mobilizing the esophagus circumferentially with a Penrose drain. Esophageal mobilization must achieve at least 2-3 cm of intra-abdominal esophageal length without tension, mediastinal dissection may be necessary, and a Collis gastroplasty should be considered for short esophagus when adequate intra-abdominal length cannot be achieved. The short gastric vessels are divided to fully mobilize the fundus for a tension-free, floppy wrap, though some surgeons omit this step. Crural closure approximates the crura posteriorly with interrupted nonabsorbable sutures (silk or braided polyester), with anterior closure added if posterior closure is inadequate and mesh reinforcement for large defects exceeding 5 cm being debated. The fundoplication is completed by passing the posterior fundus behind the esophagus (the shoe-shine maneuver confirms correct fundus orientation), creating a 2-3 cm wrap over a 52-60 Fr bougie, and securing with 2-3 interrupted nonabsorbable sutures incorporating the anterior esophageal wall, ensuring the wrap is "floppy" with no tension.
Partial Fundoplication
The Toupet fundoplication (270-degree posterior) is indicated when esophageal motility is impaired with weak peristalsis, carries a lower risk of dysphagia, and involves securing the posterior fundus to the right and left crura and to the edges of the esophagus. The Dor fundoplication (anterior 180-200 degrees) is primarily used after Heller myotomy for achalasia, as it covers the exposed myotomy and provides a partial anti-reflux barrier.
<image>Intraoperative illustration showing the completed Nissen fundoplication with the posterior fundus wrapped 360 degrees around the distal esophagus over a bougie, with labeled crural repair sutures, the floppy wrap configuration, and the relationship of the vagus nerves to the wrap</image>
Paraesophageal Hernia Repair
The principles of paraesophageal hernia repair include complete hernia sac excision (controversial but may reduce recurrence), reduction of the stomach into the abdomen, crural repair, and fundoplication (Nissen or Toupet) to anchor the stomach below the diaphragm. Crural closure is performed posteriorly with interrupted nonabsorbable sutures, with anterior closure for additional reinforcement, and mesh augmentation remains controversial (biologic mesh is preferred if used, as synthetic mesh risks erosion into the esophagus). Gastropexy using the anterior technique (Boerema) with or without a gastrostomy tube may be performed in elderly or high-risk patients as an alternative to fundoplication. Collis gastroplasty is indicated for irreducible short esophagus and involves creation of a neoesophagus from the gastric cardia using a linear stapler parallel to the lesser curvature. Recurrence rates are 5-15% radiographically, though most recurrences are small, asymptomatic sliding hernias, and symptomatic recurrence requiring reoperation occurs in 3-5%.
Endoscopic and Alternative Approaches
Magnetic Sphincter Augmentation (LINX Device)
The LINX device consists of a ring of titanium beads with magnetic cores placed around the distal esophagus at the GEJ. Magnetic attraction augments the LES at rest, while swallowing force opens the ring to allow bolus passage. It is indicated for documented GERD with an abnormal pH study, hiatal hernia less than 3 cm, normal esophageal motility, and BMI below 35, and is not indicated for Barrett's esophagus or large hiatal hernias. Results show comparable reflux control to Nissen fundoplication with potentially lower rates of gas-bloat syndrome and inability to belch or vomit, with 5-year data demonstrating durable symptom control. Complications include dysphagia (most common, usually self-limited), device erosion (rare, 0.1-0.3%), and device migration.
Transoral Incisionless Fundoplication (TIF)
TIF uses the EsophyX device to create an endoscopic partial fundoplication, forming a 270-degree, 2-3 cm wrap at the GEJ with polypropylene fasteners. It is indicated for GERD with small hiatal hernia less than 2 cm, PPI-dependent patients desiring intervention, and normal motility. Results are inferior to laparoscopic Nissen for severe GERD, and it is best suited for patients with mild-to-moderate GERD unwilling to undergo surgical fundoplication. Its advantage is that it is an incisionless, outpatient procedure.
Roux-en-Y Gastric Bypass as Anti-Reflux Procedure
Roux-en-Y gastric bypass is the most effective anti-reflux operation in morbidly obese patients with GERD and BMI above 35. Its mechanism involves diversion of bile from the esophagus, creation of a small pouch with low acid production, and reduction of abdominal pressure with weight loss. It is preferred over fundoplication in obese patients due to the high recurrence rates of fundoplication in this population.
Complications of Anti-Reflux Surgery
Dysphagia is the most common early complication (10-20%), is usually transient and resolves within 3-6 months, though persistent dysphagia may require endoscopic dilation or reoperation. Gas-bloat syndrome involves inability to belch or vomit with bloating and flatulence, is more common with Nissen than partial wraps, and is managed with dietary counseling and simethicone. Wrap migration or herniation occurs when the wrap migrates into the thorax and may require reoperation. Wrap disruption involves breakdown of the fundoplication with recurrent reflux and may require reoperation if symptoms are severe. Vagal nerve injury can cause delayed gastric emptying and diarrhea, though injury is usually unilateral and self-limited. Recurrent GERD has a 5-10% failure rate at 10 years and should be evaluated with EGD, pH testing, barium swallow, and manometry before considering reoperation.
Key Clinical Pearls
High-resolution manometry is mandatory before fundoplication to rule out achalasia and guide selection of complete versus partial wrap. The success of anti-reflux surgery depends on patient selection, with typical symptoms, documented acid exposure, and PPI responsiveness predicting favorable outcomes. Adequate intra-abdominal esophageal length of 2-3 cm must always be achieved, as a short esophagus under tension leads to wrap herniation and failure. The LINX device is an emerging option for carefully selected patients with mild-moderate GERD and small hiatal hernia. Roux-en-Y gastric bypass is the preferred anti-reflux operation in obese patients with GERD.
References
- Stefanidis D, Hope WW, Kohn GP, et al. Guidelines for surgical treatment of gastroesophageal reflux disease (GERD). Surg Endosc. 2010;24(11):2647-2669.
- Ganz RA, Peters JH, Horgan S, et al. Esophageal sphincter device for gastroesophageal reflux disease (LINX). N Engl J Med. 2013;368(8):719-727.
- Katz PO, Dunbar KB, Schnoll-Sussman FH, et al. ACG Clinical Guideline for the Diagnosis and Management of Gastroesophageal Reflux Disease. Am J Gastroenterol. 2022;117(1):27-56.
- Lidor AO, Kawaji Q, Englesbe M, et al. Paraesophageal hernia repair: a SAGES guidelines update. Surg Endosc. 2013;27(12):4409-4428.
