A study of proximal esophageal baseline impedance in identifying and predicting laryngopharyngeal reflux

Background and Aim Laryngopharyngeal reflux (LPR) is caused by the reflux of gastric contents beyond the esophagus into the larynx and pharynx. However, upper esophageal sphincter (UES) motility and proximal esophagus reflux parameters are poorly studied. This study aims to explore the characteristics of UES motility and reflux parameter among LPR patients. Methods Patients with laryngopharyngeal symptoms only (L), patients with...