Abstract
Aspiration pneumonia developed within 1 year in 29 of 60 stroke patients referred for videofluoroscopic evaluation of poststroke dysphagia and drawn from a total population of 304 acute stroke patients. The presence of vallecular pooling, piriform pooling, or bolus penetration to or through the true vocal cords on videofluoroscopy did not correlate with the development of aspiration pneumonia. Kinematic pharyngeal transit times did show a significant correlation with the development of aspiration pneumonia (time of first movement, p = .038; time of arrival of bolus at valleculae, p = .0008; time of return of epiglottis to resting position, p = .0001). Those patients with total kinematic pharyngeal transit times (Em) of less than 2.00 sec were at little or no risk for aspiration pneumonia (0%), those with 2.01 to 5.00sec at moderate risk (38.5%), and those with more than 5.00sec were at marked risk (90%).
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