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acoustic_analysis_of_voice_after_injection_laryngoplasty [2014/03/18 19:50] (current)
bziolko created
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 +Beata Miaśkiewicz, Agata Szkiełkowska, Henryk Skarżyński (Poland)
  
 +**Acoustic analysis of voice after injection laryngoplasty**
 +
 +The objective was to assess the voice quality of patients treated with the surgical method of hyaluronic acid injection into the vocal fold. The material included 30 patients suffering from dysphonia, referred for injection laryngoplasty. The group included 6 patients with glottic insufficiency and atrophy of vocal fold, 5 patients suffered from presbyphonia, 3 had scar and vocal fold atrophy, 3 had sulcus vocalis, and 13 suffered from unilateral vocal fold paralysis. Patients included in the study underwent laryngological and phoniatric examination. Preoperative and postoperative examinations were based on videostrobolaryngoscopy with assessment of glottic closure, quality of vocal fold vibration: symmetry, regularity, amplitude, mucosal wave, and differences in the position of vocal folds. Patients’ voice was assessed using the subjective GRBAS scale and Multidimensional Voice Program(MDVP). The microsurgical procedures were performed under general anesthesia applying suspension laryngoscopy. For the injection Surgiderm 24 XP hyaluronic acid by Allergan was used. The program of care over patients after hyaluronic acid augmentation provided by the Audiology and Phoniatrics Clinic included voice rehabilitation conducted for 3 months after operation. Follow-up examinations including GRBAS, videostroboscopy and acoustic measurements of patients’ voices were conducted 12, 18 and 24 months after injection. Perceptual voice quality (GRBAS) in patients with dysphonia was improved. Analysis of single parameters showed that the best results were obtained within the G-parameter (grade) and B-parameter (breathiness) and the results were stabile in long term follow up. MDVP analyses showed significant statistical improvement within frequency, amplitude and noise parameters. The differences in value between following observation periods were not statistically significant. Stabilisation of the noise parameter indexes confirmed improvement of vocal fold adduction and reduction of glottic gap after hyaluronic acid injection.
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