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Sliding Hiatal Hernia: Causes, Symptoms & Treatment
A sliding hiatal hernia occurs when part of the stomach slides up through the diaphragm opening into the chest cavity. It is the most common type of hiatal hernia and often causes acid reflux and heartburn.
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A sliding hiatal hernia occurs when part of the stomach slides up through the diaphragm opening into the chest cavity. It is the most common type of hiatal hernia and often causes acid reflux and heartburn.
What is a Sliding Hiatal Hernia?
A sliding hiatal hernia is the most common form of hiatal hernia, accounting for approximately 95 percent of all cases. It occurs when the upper part of the stomach slides upward through the esophageal hiatus – the opening in the diaphragm through which the esophagus passes – and into the chest cavity. Unlike other types of hernias, this displacement is typically reversible, meaning the stomach can slide back into its normal position.
Sliding hiatal hernias are extremely common, affecting an estimated 10 to 50 percent of the adult population, with prevalence increasing significantly with age.
Causes
Several factors contribute to the development of a sliding hiatal hernia:
- Age-related changes: The connective tissue supporting the diaphragm weakens over time, widening the hiatal opening.
- Obesity: Excess body weight increases intra-abdominal pressure, pushing the stomach upward.
- Pregnancy: The growing uterus elevates pressure in the abdominal cavity.
- Chronic elevated abdominal pressure: Caused by persistent coughing, constipation, or heavy lifting.
- Genetic predisposition: A family history of hiatal hernia increases the risk.
Symptoms
Many individuals with a sliding hiatal hernia experience no symptoms at all. When symptoms do occur, they are most commonly related to gastroesophageal reflux disease (GERD) – the backflow of stomach acid into the esophagus:
- Heartburn, especially after meals or when lying down
- Acid regurgitation
- Difficulty swallowing (dysphagia)
- Chest pain or a feeling of pressure behind the sternum
- Chronic cough or hoarseness caused by irritation of the airways
- Rarely: bleeding due to mucosal injury
Diagnosis
The diagnosis of a sliding hiatal hernia is established through the following examinations:
- Upper endoscopy (gastroscopy): The most common method for direct visual assessment of the esophagus and gastric inlet.
- Barium swallow X-ray: Provides an imaging view of the stomach displacement.
- 24-hour pH monitoring and impedance measurement: Measures the degree of acid reflux in the esophagus over a full day.
- Esophageal manometry: Assesses the pressure of the lower esophageal sphincter.
Treatment
Conservative Measures
For mild to moderate symptoms, non-surgical approaches are the first line of management:
- Weight loss in overweight individuals
- Eating smaller, more frequent meals
- Avoiding fatty, spicy, or acidic foods
- Not eating within 2 to 3 hours of bedtime
- Elevating the head of the bed during sleep
- Avoiding alcohol, tobacco, and caffeine
Medical Therapy
Medications are used to relieve reflux symptoms and protect the esophageal lining:
- Proton pump inhibitors (PPIs) such as omeprazole or pantoprazole: They reduce gastric acid production and are the first-choice treatment.
- H2 receptor blockers (e.g., famotidine): An alternative for milder symptoms.
- Antacids: Provide short-term neutralization of stomach acid for acute heartburn relief.
Surgical Treatment
Surgery is considered when symptoms are severe, do not respond to conservative treatment, or when complications arise such as bleeding or stricture:
- Laparoscopic fundoplication (e.g., Nissen fundoplication): The lower end of the esophagus is wrapped with part of the stomach to strengthen the lower esophageal sphincter. This minimally invasive procedure has high long-term success rates.
- Hiatal repair (hiatoplasty): Narrowing of the enlarged hiatal opening using sutures or a surgical mesh.
References
- Koop, H. et al. (2014): S2k guideline on gastroesophageal reflux disease. Zeitschrift für Gastroenterologie, 52(11), 1299–1346. German Society of Gastroenterology (DGVS).
- Stefanidis, D. et al. (2010): SAGES guidelines for surgical treatment of gastroesophageal reflux disease. Surgical Endoscopy, 24(11), 2647–2669.
- Kahrilas, P.J. (2008): Gastroesophageal Reflux Disease. New England Journal of Medicine, 359(16), 1700–1707.
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