, often referred to as "silent reflux". Unlike gastroesophageal reflux disease (GERD), which primarily affects the esophagus, LPR involves the retrograde flow of gastroduodenal contents—including acid, pepsin, and bile salts—beyond the upper esophageal sphincter into the larynx and pharynx. 1. Pathophysiology and Mechanisms
By understanding LPR physiology and pathophysiology, healthcare providers can develop effective treatment plans and improve patient outcomes. This comprehensive guide provides a detailed exploration of LPR physiology, highlighting the complex mechanisms and factors that contribute to this condition. lpr physiology pdf
PPIs raise intragastric pH from 2 to 6. While they reduce acid, they may increase pepsin concentration. Since pepsin is active up to pH 6, PPIs alone are often insufficient. Doses >40mg daily show diminishing returns for LPR. , often referred to as "silent reflux"
In typical GERD, the LES fails, allowing gastric acid and pepsin into the esophagus. However, in isolated LPR, the LES is often functionally normal. The real culprit is the . While they reduce acid, they may increase pepsin
– A formal treatment guide from Stanford Health Care .