Dysphagia in bulimia nervosa.

The findings on 13 patients with bulimia nervosa referred for evaluation of salivary glands and swallowing patterns are presented. Each patient completed a medical, oral, and social history questionnaire. A complete oral examination supported by appropriate dental radiographs and photographs was conducted. Unstimulated and stimulated parotid and submandibular saliva was collected. The presence or absence of pharyngeal and velar gag reflexes was ascertained. Real-time ultrasound scanning and barium swallow studies were used to evaluate the oral-motor functions while swallowing on 6 of the subjects. Activity of the pharynx, larynx, and esophagus was recorded during the videofluorographic studies. Saliva concentrations of amylase were determined in the referred subjects as well as 13 age-matched healthy controls. No significant difference was detected between the salivary gland flow rates and amylase concentrations of the two groups, whether stimulated or unstimulated. The pharyngeal gag reflex was absent in 9 of the 13 bulimic patients and a velar gag reflex could be elicited in only 1. All of the normal controls had both gag reflexes. All of the patients with bulimia were found to have abnormal oropharyngeal swallow patterns and an increased duration of dry swallow.