Videokymography assessment of vocal fold vibration before and after hydration

[摘要] Keeping the body hydrated is one of the factors that contribute to organic and functional laryngeal health, especially for professional voice users. Hydration is considered an important factor for the prevention and treatment of dysphonias. There is no objective evaluation that quantifies water present in the vocal fold tissue. AIM: To evaluate changes in vocal folds investigated through videokymography after internal and external hydration of voice professionals. STUDY DESIGN: Clinical prospective. MATERIAL AND METHOD: We assessed six male professional voice users after leaving the workplace (six hours) and without having drunk water for the past four hours. We conducted ENT evaluation, comprising the first laryngeal assessment with laryngoscopy with and without stroboscopic and videokymography. These people were submitted to external and internal laryngeal hydration. They drank two glasses of hydrating solution with electrolytes, Passion Fruit Flavor (total of 300 ml), at room temperature, and external hydration with inhalation of saline solution at 0.9% during 10 minutes. Using videokymography we evaluated the time of open and closed phases during phonation, defining a quotient between these two parameters.RESULTS: We found five subjects with reduced or increased quotient. CONCLUSION: Videokymography was able to detect differences at the vibrating characteristics of vocal folds before and after hydration.

[学科分类] 医学（综合）

[关键词] larynx;hydration;voice;kymography.