The relationship between dysphagia, pump function, and lower esophageal sphincter pressures on high-resolution...

Area of Science:

• Gastroenterology
• Esophageal Physiology
• Diagnostic Imaging

Background:

• Dysphagia is a common symptom requiring accurate diagnosis.
• High-resolution impedance manometry (HRIM) is an advanced technique for evaluating esophageal function.
• Understanding HRIM parameters in dysphagia is crucial for patient management.

Purpose of the Study:

• To compare HRIM findings in patients with and without dysphagia.
• To identify HRIM parameters associated with dysphagia.
• To differentiate causes of dysphagia based on HRIM metrics.

Main Methods:

• Reviewed prospectively maintained HRIM database.
• Excluded patients with specific esophageal conditions or prior surgery.
• Compared lower esophageal sphincter pressure integral (LESPI) and distal contractile integral (DCI) between groups.
• Categorized subjects based on wave morphology and dysphagia presence.

Main Results:

• 113 patients met criteria; dysphagia patients showed higher LESPI and DCI.
• Multivariate analysis linked dysphagia to ≥ 60% hypocontractile waves, LESPI >400 mmHg s cm, and DCI >3,000 mmHg s cm.
• Patients with <60% hypocontractile waves and dysphagia (Group B) had higher LESPI and DCI than those without dysphagia (Group A).

Conclusions:

• Dysphagia with ≥ 60% hypocontractile waves suggests intrinsic pump failure (low DCI).
• Dysphagia with <60% hypocontractile waves indicates significant outflow obstruction (high LESPI and integrated relaxation pressure).
• HRIM parameters effectively differentiate causes of dysphagia.