: To investigate the relationship between esophagoscopic findings and total acid reflux time in the upper esophagus in the patients of laryngopharyngeal reflux disease (LPRD), and to evaluate whether pH<5 holding time is appropriate for diagnosing LPRD.
The relationship between esophagoscopic findings and total acid reflux time below pH 4 and pH 5 in the upper esophagus in patients with laryngopharyngeal reflux disease (LPRD).