A influência da angulação na posição do telescópio na videoquimografia laríngea

Abstract

Vi deokymography is a new high-speed imaging techniqueto investigate vocal fold vibration. The system has been considered useful in the analysis of irregular signals, making it possible to observe left-right asymmetries, open quotient, propagation of mucosal waves, and movement of the upper and lower margins. The aim of the present study was to verify the correspondence of the videokymographic images with larynx exposition angle variation. Three Brazilian adult female subjects, with no vocal complains, were evaluated. Videokymographic images were obtained with the laryngeal endoscope 90o positioned on the measuring line, perpendicular to the glottal axis -zero degree, during a sustained "ae" vowel, using habitual frequency and intensity. The procedure was repeated twice and adjusted by rotating the camera in fifteen degrees from the perpendicular line to the right and to the left. The results showed clear differences depending on the position of the endoscope, suggesting the standardization of laryngeal exposition to interpretate videokymographic images correctly.

Parameters Acoustic and High-speed kymography identified effects of voiced vibration and vocal fry exercises

“…Laryngological examinations were performed by the same laryngologist, the doctor who collaborated in this research, and the position of the rigid endoscope was controlled during examinations (14) . The rigid endoscope was placed parallel to the vocal folds, in the same angle and distance used in the pre-vocal exercises.…”

Quimografia de alta velocidade em 3D em sujeitos com presbifonia

“…Desta, utilizaram os tempos de fase aberta, fechada e quociente de abertura, para avaliar as variações do padrão vibratório durante emissão vocal habitual e em intensidade elevada. Pontes et al (2005) apresentaram um estudo mostrando a importância na padronização no processo de exposição laríngea uma vez que detectou diferenças importantes na análise da videoquimografia de acordo com a angulação da câmera no momento da captação das imagens. Pimenta et al (2013), com a utilização da videolaringoscopia de alta velocidade, utilizaram parâmetros acústicos (Jitter e Shimmer) associadas a informações quantitativas da quimografia de alta velocidade (fases aberta, fechada, de abertura e de fechamento) com o objetivo de identificar efeitos imediatos de exercícios de vibração sonorizada e som basal.…”