Uses of esophageal function testing: dysphagia

Area of Science:

• Gastroenterology
• Esophageal Physiology
• Diagnostic Techniques

Background:

• Dysphagia, or difficulty swallowing, can result from esophageal muscle hypermotility or hypomotility.
• Reduced distensibility of the esophagus or esophagogastric junction is another cause of dysphagia.
• Achalasia is a primary esophageal motility disorder, but other conditions also contribute to dysphagia.

Purpose of the Study:

• To highlight the role of esophageal function testing in the differential diagnosis of dysphagia.
• To discuss the utility of high-resolution manometry (HRM) and impedance techniques in evaluating esophageal motility and bolus transit.
• To introduce impedance planimetry as a method for assessing esophageal and gastroesophageal junction distensibility.

Main Methods:

• High-resolution manometry (HRM) as the gold standard for diagnosing esophageal motility disorders.
• Simultaneous measurement of HRM and intraluminal impedance to assess esophageal motility and bolus transit.
• Impedance planimetry to measure the distensibility of the esophageal body and gastroesophageal junction.

Main Results:

• Esophageal function testing is crucial for differentiating causes of dysphagia.
• HRM is the primary tool for identifying esophageal motility disorders.
• Combined HRM and impedance measurements provide comprehensive data on motility and bolus transit.
• Impedance planimetry effectively measures distensibility in conditions like achalasia and eosinophilic esophagitis.

Conclusions:

• Esophageal function testing, particularly HRM and impedance techniques, is essential for diagnosing dysphagia.
• These methods help identify motility abnormalities and assess distensibility, aiding in the management of esophageal disorders like achalasia.