EFFECT OF THE PUSHING TECHNIQUE ON DIGITAL VIDEOKYMOGRAPHY PARAMETERS OBTAINED FROM HIGH-SPEED VIDEOLARYNGOSCOPY IN VOCALLY HEALTHY INDIVIDUALS

• Grant number: 22/16886-7
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: May 01, 2023
• End date: December 31, 2023
• Field of knowledge: Health Sciences - Speech Therapy
• Principal Investigator: Rosiane Kimiko Yamasaki Odagima
• Grantee: Maria Paula Borges Benevides
• Host Institution: Escola Paulista de Medicina (EPM). Universidade Federal de São Paulo (UNIFESP). Campus São Paulo. São Paulo , SP, Brazil

Abstract

Introduction: Vocal rehabilitation is an important treatment modality for vocal disorders and aims to provide patients with improved vocal functionality. While in behavioral dysphonia the goal is to promote more balanced muscle adjustments, in organic dysphonia speech therapy focuses on maximizing vocal production, often by developing compensatory mechanisms. Among the vocal techniques described in the literature, the push technique has an important clinical application in cases of phonatory incompetence, such as paralysis of the vocal cords and presbylarynx. However, there is still a lack of information on the vibration characteristics of the vocal folds during the execution of the push technique. Objective: To verify the effect of the hook-hand push technique on the digital videokymography parameters obtained by high-speed videolaryngoscopy in vocally healthy individuals. Method: 10 young adults without self-reported voice complaints and with normal laryngological examination will participate in the research, 5 female and 5 male, aged between 18 and 45 years. Participants will be instructed to emit the sustained vowel /e/ with their head straight, with and without clasped hands at chest level, during the video laryngoscopy. The videokymography parameters obtained by high-speed videolaryngoscopy will be: closed phase time (FF), open phase time (Fa), closed phase time (Ff), open phase time (FA), and a total period of the vibratory cycle ( PTCV). These parameters will be obtained from a horizontal line located in the middle third of the vocal cords. The analysis of the videokymography images will be carried out using the X-CAD algorithm, developed by the Medical Engineering Research Group - GPEM. Ten glottic cycles will be selected from the most stable portion of each video of laryngeal images for the analysis of morphometric parameters. Method of analysis of the results: The images will be analyzed using the morphometry of the high-speed kymography parameters.