[Horizontal glottectomy--oncological and functional results. Part II. Morphology of the glottis and perceptive-acoustics characteristic of the voice and speech after horizontal glottectomy].

Introduction: The authors showed findings concerning glottis morphology and perceptual-acoustic characteristics of voice and speech after partial classical (PCGLg) and extended glottic partial laryngectomy (PEGLg).

Material And Methods: 10 patients (9 M., 1 F. average age 56 (min. 47 max. 65) were examined. All patients were undergone glottic partial laryngectomy: a) classical (n = 5) b) extended of vocal process (n = 3) with (n = 2) or without (n = 1) the removal of the mucous false folds, c) extended of part of arytenoid cartilage with (n = 2) or without (n = 1) the removal of the mucous of the false folds. The following examinations were executed: phoniatric, videolaryngoscopic and perceptual-acoustic analysis.

Results: After PCGLg and one extended of vocal process, voice and speech has mostly characterized of features of hypofunction dysphonia. Hyperfunction was found in patients after removal of the mucous of the false folds due to leucoplakia. In case of removing of a part of arythenoid cartilage the notable or entire standstill or lack of full phonatory closure were found. The phonetical-acoustic analysis showed that in patients using melodious voice, the character of the source of actuating was periodically-noise, with the component of noise in all range of the course of the acoustic signal of voice. The parameters such as F0, jitter, shimmer does not make coherent conclusions and are less useful in the assessment of the quality of voice.

Conclusions: In case of the resection of the part of the arythenoid cartilage during glottis laryngectomy, we take into account lack of full phonatory closure and using whisper by the patients. Obtaining the reliable conclusions needs continuations of the investigations and increasing number of patients. These researches are in progress.