Normal swallowing physiology as viewed by videofluoroscopy and videoendoscopy.

This study examines normal oropharyngeal swallow physiology in 8 young adult males with concurrent videofluoroscopy and videoendoscopy. Twelve swallows were examined for each subject, 3 swallows each of 1 and 5 ml of thin liquid at each of two endoscopic positions: (1) the tip of the endoscope just at or below the tip of the uvula (high position), and (2) the tip of the endoscope just below the tip of the epiglottis (low position). Results indicate that if the clinician is interested in laryngeal events occurring before and after swallow, videoendoscopy with the endoscope in the low position is the procedure of choice. To evaluate pharyngeal anatomy and/or the presence of food in the pharynx before or after swallow, either endoscopy with the endoscope in the high position or videofluoroscopy can be used. However, if the clinician is interested in pharyngeal physiology during swallow, videofluoroscopy is a better diagnostic procedure.