양성후두질환에서 후두미세수술 전후 음성의 비교분석

Background and Objective: In benign laryngeal diseases, voice quality is major concern to both patients and clinicians. The purpose of this study is to identify the acoustic parameters that can represent preoperative pathologic and postoperative improved voice and to investigate quantitative changes of them. Using these data, We intend to disclose the mechanisms of voice change and apply to programs that can predict postoperative voice using preoperative voice data. Material and Methods: We examined 47 patients who experienced laryngeal microsurgery due to pathologic voice with benign laryngeal diseases and 50 normal controls. The voice was analysed by Multi-Dimensional Voice Program in Computerized Speech Lab 4300 B. Results: All preoperative parameter’s values except NHR and VTI were higher than control group. Among them, the values of frequency and amplitude perturbation related parameters increased most highly. Most parameter's values after operation showed statistically no significant difference from those of control group. Postoperative parameter’s values reduced above 50% of PPQ, RAP, sPPQ, Jitt, ShdB, Jita and Shim than preoperative state. Conclusion: The results showed that Jitter and Shimmer represented well the pathologic voice of benign laryngeal disease and very closely related between improvements of both these parameters and voice quality after operation. We also considered that these data will be available in the program of postoperative predictive voice synthesis using preoperative voice data. (J Clinical Otolaryngol 2001;12:65-79)