Functional and Manofluorographic Outcomes After Transoral Endoscopic Pharyngoesophageal Diverticulostomy

Abstract

The cricopharyngeal (CP) muscle contributes to the valve of the pharyngoesophageal segment (PES).1,2 The terms PES and upper esophageal sphincter are used synonymously in the literature; PES is used herein. The PES valve is closed at rest to help prevent esophageal reflux and opens to allow bolus passage during swallowing. PES resting pressure results from the CP muscle and the pressure of the posterior cricoid plate against the curved anterior cervical spine due to actions of the strap muscles. During swallowing, the CP muscle relaxes, and the larynx and posterior cricoid plate move off the anterior cervical spine to allow bolus passage.1,2 This action produces the negative pressure CP nadir seen on pharyngeal manometry.