Dysphagia following stroke: quantitative evaluation of pharyngeal transit times.

Abstract

Forty stroke subjects referred for dysphagia and studied by videofluoroscopy were compared with 16 individuals with no known pharyngeal swallowing difficulty. Kinematic pharyngeal transit time was defined as the time from the first movement of the bolus posteriorly resulting in a complete swallow to the return of the epiglottis to its original position. The mean transit time was 1.00 second for the comparative group and 6.15 seconds for the stroke group (p less than 0.001). Other component transit times are described and were all significantly prolonged for the stroke group. There was no significant difference in transit times between right-sided and left-sided lesions except for the segmental interval from onset of bolus movement to arrival at the valleculae, which was significant at p = 0.05. Measurement of transit times using the method described in this study requires equipment available in most hospitals. These measurements may be used in the evaluation of dysphagia in various pathologic disorders, in following the progress of patients with dysphagia, and in evaluating the effects of remedial therapies.