Oral Intake Difficulty and Aspiration Pneumonia Assessment Using High-Resolution Manometry.

Area of Science:

• Gastroenterology
• Otolaryngology
• Neurology

Background:

• The sequential generation of swallowing pressure (SP) is crucial for effective bolus transit from the oral cavity to the esophagus.
• Dysphagia, characterized by swallowing difficulties, can lead to severe complications such as aspiration pneumonia.

Purpose of the Study:

• To investigate the correlation between the swallowing pressure (SP) sequence mode, assessed via high-resolution manometry (HRM), and the clinical outcomes of oral intake difficulty and aspiration pneumonia in patients with dysphagia.

Main Methods:

• A cross-sectional study enrolled 202 consecutive dysphagia patients.
• High-resolution manometry (HRM) data were classified based on SP sequence mode (Type A-D) and upper esophageal sphincter (UES) pressure topography (Type 1-2).
• Clinical severity was evaluated by oral intake difficulty and aspiration pneumonia incidence.

Main Results:

• Patients with totally decreased (Type C) or disappeared (Type D) SP sequences, and non-flattening UES pressure (Type 2) showed significantly higher odds of oral intake difficulty.
• Type C and Type 2 patterns were also significantly associated with a higher risk of aspiration pneumonia.

Conclusions:

• Failure in the sequential generation of swallowing pressure is a significant risk factor for both oral intake difficulty and aspiration pneumonia in dysphagia patients.
• HRM-based SP sequence analysis is valuable for understanding dysphagia pathophysiology, assessing severity, and guiding safe nutritional management strategies.