Pathophysiology of gastro-oesophageal reflux disease.
Level 5 - mechanism / opinion, no new human data
Narrative review of mechanisms without original empirical data or systematic search methodology
What was done
This narrative review describes the pathophysiological mechanisms of gastro-oesophageal reflux disease, detailing the motor, anatomical, and mucosal factors involved in oesophageal damage and the proposed pathways underlying extra-oesophageal airway manifestations.
What was found
The abstract reports no numerical data or quantitative outcomes. It describes qualitative mechanistic factors including transient lower oesophageal sphincter relaxations, sphincter pressure abnormalities, hiatal hernia, impaired oesophageal clearance, delayed gastric emptying, and impaired mucosal defensive barriers, alongside direct mucosal contact and vago-vagal reflex hypotheses for extra-oesophageal symptoms.
Why it matters
It provides a synthesized conceptual framework of the multiple interacting physiological defects that produce reflux disease and associated respiratory and laryngeal complications.
Limits
As a narrative review, the paper presents no original empirical data, sample size, control groups, or systematic search criteria, providing only mechanism-based reasoning.
Cited by
- contradicts Normal stomach acidity has a pH between 1.5 and 3.0, and elevated stomach pH causes the lower esophageal sphincter valve to fail to close properly.