Videostroboscopy of human vocal fold paralysis.

摘要: Previous stroboscopic studies of human vocal cord paralysis have been infrequent and lacked documentation the site lesion. In order to study laryngeal paralysis, recurrent superior nerves were infiltrated unilaterally with lidocaine hydrochloride in three volunteers. Vagal was simulated by combined (superior recurrent) infiltration one volunteer. Additionally, 20 patients untreated studied from voice laboratory at UCLA. addition videostroboscopic analysis, photoglottography electroglottography performed synchronized images. The most significant finding stroboscopy paralyzed larynx asymmetry traveling wave motion. on normal fold had a faster velocity that created phase difference vibration two folds. also traversed greater distance along mucosa side. No patient or vo...