VALIDATION OF A NEW WATER-PERFUSED HIGH-RESOLUTION MANOMETRY SYSTEM

Area of Science:

• Gastroenterology
• Esophageal Physiology
• Medical Device Technology

Background:

• High-resolution manometry (HRM) offers superior clinical insights compared to conventional methods but is often cost-prohibitive.
• Water-perfused HRM systems present a potential cost-reduction strategy, yet their reliability and interchangeability of reference values with solid-state systems require validation.

Purpose of the Study:

• To establish and validate normal reference values for a novel 24-sensor water-perfused high-resolution manometry system.
• To assess the system's ability to differentiate normal esophageal function from various motility disorders.

Main Methods:

• A cohort of 225 individuals undergoing high-resolution manometry for clinical indications was studied.
• Participants were categorized into four groups: gastroesophageal reflux disease, achalasia, systemic diseases with esophageal involvement, and dysphagia.

Main Results:

• In the gastroesophageal reflux disease group, 49% of pH-monitoring-positive individuals exhibited a hypotonic lower esophageal sphincter, compared to 28% of pH-negative individuals.
• Aperistalsis was universally observed in patients diagnosed with achalasia and systemic diseases affecting the esophagus.
• Only 14% of patients in the dysphagia group presented with normal high-resolution manometry findings.

Conclusions:

• The established normal values for the low-cost water-perfused HRM system are effective in discriminating common esophageal motility abnormalities encountered clinically.
• The system's unique design, featuring a peristaltic pump and helicoidal sensor distribution, contributes to its diagnostic utility.