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Gastroesophageal Reflux Disease (GERD)

Overview

  • GERD is the most common benign condition affecting the stomach and esophagus. It occurs due to the failure of antireflux mechanisms, primarily involving the lower esophageal sphincter (LES).

  • Surgical intervention, particularly laparoscopic anti-reflux surgery (LARS), is recommended for patients with persistent symptoms despite maximal medical therapy.

  • Laparoscopy has been shown to reduce morbidity, hospital stays, and costs compared to open surgery.

Pathophysiology

  • The LES prevents gastric contents from refluxing into the esophagus. Its function relies on several structures:

    • Intrinsic Musculature: Maintains tonic contraction and relaxes briefly to allow swallowing.

    • Sling Fibers of the Gastric Cardia: Assist in maintaining the high-pressure zone of the LES.

    • Crura of the Diaphragm: Contributes to LES pressure via changes in thoracic and abdominal pressure during breathing.

    • Gastroesophageal Junction (GEJ): Proper anchoring in the abdominal cavity is crucial for avoiding reflux.

  • GER manifests when intragastric pressure exceeds LES pressure, leading to symptomatic reflux.

Diagnosis and Evaluation

  • Diagnosis typically involves assessing typical symptoms and may also include:

    • Ambulatory pH Monitoring: The gold standard for diagnosing GERD by quantifying acid exposure.

    • Esophageal Manometry: Evaluates the functional status of the esophagus and measures LES pressure.

    • Esophagogastroduodenoscopy (EGD): Identifies mucosal injury due to GERD and allows for direct imaging.

Treatment

  • Medical Management: Proton Pump Inhibitors (PPIs) are the first line of treatment. Patients should undergo an 8-week trial of PPIs.

  • Surgical Treatment: For those unresponsive to PPIs, LARS is an effective option, providing durable relief and is cost-effective compared to prolonged medical therapy.

Hiatal Hernia

Types of Hiatal Hernias

  1. Sliding Hiatal Hernia (Type I): The most common type; occurs when the GEJ migrates into the thorax.

  2. Paraesophageal Hernia (Type II-IV): Involves the stomach sliding through the diaphragm but retains GEJ position, often leading to more severe symptoms.

    • Type II: GEJ remains anchored, with the fundus herniating.

    • Type III: Both GEJ and fundus are in the thorax.

    • Type IV: Other visceral organs may also herniate into the mediastinum.

Clinical Presentation

  • Symptoms can range from mild GERD to severe obstructive symptoms, including dysphagia and acute complications such as gastric volvulus.

Preoperative Evaluation

  • Similar diagnostic tests are utilized for PEH. Barium studies help visualize the anatomy, while endoscopy assesses mucosal injuries.

Surgery Performance

  • Repair can be performed via laparoscopy and involves:

    • Hernia content reduction and sac excision.

    • Mobilization of the esophagus to obtain adequate intra-abdominal length.

    • Closure of the hiatus, often with reinforcement using biologic mesh.

Complications and Management

  • Postoperative complications may include dysphagia, bloating, and potential herniation. Close monitoring and early intervention for complications are crucial.

Summary of Treatment Approaches

  • Comprehensive approaches are necessary to evaluate and treat patients with GERD and hiatal hernia effectively. The surgical management offers significant benefits, particularly in symptomatic relief and quality of life improvements.

  • Ongoing research is required to optimize techniques and explore alternative therapies like magnetic sphincter augmentation (LINX) for those not suitable for traditional surgery.

Selected References

  • Oelschlager BK, et al. on Laparoscopic Paraesophageal Hernia Repair outcomes and surgical guidelines.

  • Studies comparing different surgical options for GERD management and their efficacy.