Browsing by Author "Bustos Castellano, Elena Abigail"

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    Evaluación perceptual de la voz pre y post jornada laboral: Un análisis mediante la escala GRBAS en la Unidad Educativa Particular Corazón de María en Cuenca 2025-2026
    (Universidad de Cuenca. Facultad de Ciencias Médicas, 2026-02-12) Bustos Castellano, Elena Abigail; Galarza Jadán, Dayanna Lizbeth; Lucio Bravo, Miriam Alexandra
    Background: Phonation depends on the interaction between the aerodynamic source, laryngeal vibration, and supraglottic filtering. Expiratory airflow generates subglottic pressure that activates glottal cycles and determines fundamental frequency, intensity, and vocal quality. In teachers, sustained vocal demands can disrupt these mechanisms, leading to fatigue and perceptual deviations detectable through the GRBAS scale. Objective: To determine the degree of perceptual voice impairment before and after the workday using the GRBAS scale at Unidad Educativa Particular Corazón de María in the city of Cuenca during the 2025-2026 period, and its relationship with occupational factors. Method: Fifty teachers with a mean age of 34 + 23 years participated by completing a survey on personal data, training, self-care, and vocal symptoms, complemented by perceptual voice assessment using the GRBAS scale. Statistical analysis was performed using SPSS. The study followed a descriptive cross-sectional analytical design. Results: In the pre-workday assessment, 56% (n = 28) presented mild alterations in the overall grade, while 44% (n= 22) showed normal voice quality. In the post-workday assessment, only 4% maintained normality; 40% showed mild impairment, 30% moderate impairment, and 16% severe impairment. A significant association was found between overall grade and years of professional experience both before the workday (Chi² = 24.54; p = 0.00) and after the workday (Chi² = 33.98; p = 0.01). After the workday, breathiness (Chi²= 26.87; p = 0.00) and asthenia (Chi² = 26.44; p = 0.00) increased significantly. Conclusions: Teachers begin the workday with normal or mildly altered vocal parameters; however, the workday significantly increases perceptual deviations, particularly in overall grade, breathiness, and asthenia. Years of professional experience constitute the main risk factor, while sex, hydration, and smoking showed no significant association. These findings support the need for vocal prevention strategies.