Oesophageal motor and sensitivity abnormalities in non-obstructive dysphagia

Area of Science:

• Gastroenterology
• Oesophageal Physiology
• Swallowing Disorders

Background:

• Non-obstructive dysphagia (NOD) presents a diagnostic challenge.
• Standard manometry often yields normal results in NOD patients.
• Oesophageal sensitivity and motility patterns require further investigation in NOD.

Purpose of the Study:

• To evaluate oesophageal sensitivity to balloon distension in NOD patients.
• To determine the relationship between oesophageal sensitivity and motility patterns in response to food ingestion.
• To assess the utility of oesophageal balloon distension and manometry in characterizing NOD.

Main Methods:

• Inclusion of 21 healthy volunteers and 19 consecutive NOD patients with normal standard manometry.
• Performance of oesophageal sensitivity testing using balloon distension prior to manometry.
• Utilisation of liquid and solid swallows during manometry to assess motility patterns.

Main Results:

• Patients with NOD exhibited significantly lower thresholds to oesophageal balloon distension (5 ml) compared to controls (9 ml).
• Dysphagia or odynophagia were reproduced in 78.9% of patients during solid swallows.
• A higher percentage of swallows with abnormal motility patterns were observed in patients compared to controls (P < 0.001).
• 42% of patients presented with both abnormal oesophageal sensitivity and motor patterns.

Conclusions:

• Oesophageal balloon distension is a sensitive tool for detecting hypersensitivity in NOD.
• Manometry with solid swallows reveals abnormal motility patterns in a significant proportion of NOD patients.
• The combined use of oesophageal balloon distension and manometry is effective in characterizing non-obstructive dysphagia.