Published online Jan 21, 2014. doi: 10.3748/wjg.v20.i3.822
Revised: November 6, 2013
Accepted: December 3, 2013
Published online: January 21, 2014
Core tip: We have developed a simple technique for esophageal examination based on transnasal endoscopy in unsedated patients. First, manometric waves and esophageal contractions were evaluated using three different modalities following the infusion of acid into the lower esophagus. Next, using nasal endoscopy, esophageal contractions and sensations were investigated in patients with Barrett’s esophagus. It was possible to observe secondary peristalsis endoscopically, using nasal endoscopy and a simple acid-perfusion study, we were able to demonstrate disorders in secondary peristalsis in patients with long segment Barrett’s esophagus.