First results of clinical application of videokymography

Abstract

Videokymography is advantageous for a more accurate diagnosis of voice disorders. Videokymography provides a simple way to study irregular vibrations of the vocal folds. Information is directly available for further processing and allows a first-time quantification of vibrations registered.

A influência da angulação na posição do telescópio na videoquimografia laríngea

“…The first published texts about videokymography were not concerned with specific details about correct introduction of the telescope [1][2][3][4][5] . One of the most recent publications 6 warned about the position of the telescope during the recording of videokymographic images, when they studied the variability of vocal fold vibration pattern with videokymography.…”

“…We could see that the three subjects presented asymmetrical values, both for closing and opening times, shown in Graphs [1][2][3][4][5][6] . Conversely, as to maximum opening, the values were practically symmetrical for the three tested subjects, as shown in Graphs 7 to 9.…”

“…Despite the literature [3][4][5][6] , videokymography is considered an excellent exam to assess dysphonic voices; initially, videokymographic images of adapted voice should be studied and interpreted so that the procedure can be used for dysphonic voices as well.…”

“…Videokymography uniquely assesses all types of irregularities of vibration, regardless of vocal quality and level of abnormality; it includes visualization of open and closed phase of glottic cycle, it identifies small left-right asymmetries, differences in the opening quotient of vocal folds, lateral propagation of mucosa wave and movement of upper and lower margins of vocal folds mucosa 1,2,5,6 . Thus, videokymography is an additional diagnostic resource, providing a very accurate analysis of the pathophysiology of vocal disorders 4,7 .…”

Videokymographic Visualization of Phonasthenia: A Nonorganic Voice Disorder

“…VKG [31, 32] is a method used to investigate vocal fold behavior, including irregular or unstable vibrations, being fast enough to analyze the actual vocal fold vibrations during phonation. As the human visual perception is restricted to a time resolution of about 15 images per second, the observation of irregularities needs a real-time “high-speed” imaging system that resolves at least 10 times the vocal fundamental frequency of 100–400 Hz [27].…”