The functional relationships between hiatal hernia and reflux esophagitis

Area of Science:

• Gastroenterology
• Esophageal Physiology
• Surgical Research

Background:

• Gastroesophageal reflux disease (GERD) is a common condition.
• The role of hiatal hernia (HH) in the pathophysiology of reflux esophagitis (RE) is not fully understood.
• Investigating functional abnormalities associated with HH and RE is crucial for understanding disease mechanisms.

Purpose of the Study:

• To investigate the functional relationship between hiatal hernia (HH) and reflux esophagitis (RE).
• To identify potential contributing factors to RE in patients with HH.
• To explore therapeutic rationales for managing complicated HH cases.

Main Methods:

• Comparative study involving four groups: healthy controls, HH without RE, HH with RE, and RE without HH.
• Utilized esophageal manometry, 24-hour intraesophageal pH monitoring (DeMeester score), acid clearance tests, and gastric emptying scans.
• Analyzed lower esophageal sphincter pressure, contraction amplitude, and gastric emptying parameters.

Main Results:

• Lower esophageal sphincter pressure was significantly decreased in patients with HH but without RE.
• The DeMeester score was significantly elevated in patients with both HH and RE.
• Delayed gastric emptying (total and proximal) was observed in patients with HH and RE.

Conclusions:

• Hiatal hernia (HH) in conjunction with delayed gastric emptying may be a significant factor in the multifactorial development of reflux esophagitis (RE).
• These findings suggest a rationale for considering prokinetic agents in the therapeutic management of patients presenting with HH complicated by RE.