Arno Olthoff1, Christina Woywod, Eberhard Kruse. 1. Department of Phoniatrics and Pedaudiology, University of Göttingen, Göttingen, Germany. olthoff@med.uni-goettingen.de
Abstract
OBJECTIVES: To evaluate and to compare the diagnostic value of videostroboscopy (VS) and high-speed glottography (HGG) in dysphonic patients. STUDY DESIGN: Randomized, prospective study. METHODS: A total of 162 patients underwentindirect laryngoscopy using both methods (VS and HGG). The resulting 324 films were evaluated by two professionals (laryngologists, MDs) using a standardized protocol containing established criteria to classify vocal fold vibratory movement qualities. RESULTS: The rating "not assessable" was mentioned significantly more often in VS than in HGG (P < .001). In HGG, methodologic failures were less frequent, and the length of investigation was shorter. Even if the agreement between the two raters was higher in HGG (54%) compared with VS (42%), both percentage values show a low accordance in diagnostic findings. CONCLUSIONS: Regardless of the method used (VS or HGG), perceptive evaluations of vibratory movements of vocal folds revealed a higher variability than assumed. This result supports the need for objective methods to analyze vocal fold vibratory movements. Therefore, real-time imaging of vocal fold vibratory movements using HGG will be necessary.
RCT Entities:
OBJECTIVES: To evaluate and to compare the diagnostic value of videostroboscopy (VS) and high-speed glottography (HGG) in dysphonic patients. STUDY DESIGN: Randomized, prospective study. METHODS: A total of 162 patients underwent indirect laryngoscopy using both methods (VS and HGG). The resulting 324 films were evaluated by two professionals (laryngologists, MDs) using a standardized protocol containing established criteria to classify vocal fold vibratory movement qualities. RESULTS: The rating "not assessable" was mentioned significantly more often in VS than in HGG (P < .001). In HGG, methodologic failures were less frequent, and the length of investigation was shorter. Even if the agreement between the two raters was higher in HGG (54%) compared with VS (42%), both percentage values show a low accordance in diagnostic findings. CONCLUSIONS: Regardless of the method used (VS or HGG), perceptive evaluations of vibratory movements of vocal folds revealed a higher variability than assumed. This result supports the need for objective methods to analyze vocal fold vibratory movements. Therefore, real-time imaging of vocal fold vibratory movements using HGG will be necessary.
Authors: Maria E Powell; Dimitar D Deliyski; Steven M Zeitels; James A Burns; Robert E Hillman; Terri Treman Gerlach; Daryush D Mehta Journal: J Voice Date: 2019-04-17 Impact factor: 2.009
Authors: Maria E Powell; Dimitar D Deliyski; Robert E Hillman; Steven M Zeitels; James A Burns; Daryush D Mehta Journal: Am J Speech Lang Pathol Date: 2016-11-01 Impact factor: 2.408