Acoustic Analysis of Benign Vocal Cord Lesions: Before and after Microlaryngeal Surgery.
- Author:
Soon Yuhl NAM
1
;
Jeong Hyeog PARK
;
Hyung Gyung JEON
;
Sang Yoon KIM
Author Information
1. Department of Otolaryngology, University of Ulsan College of Medicine, Seoul, Korea. synam@www.amc.seoul.kr
- Publication Type:Original Article
- Keywords:
Acoustic analysis;
Benign vocal cord lesions;
Microlaryngeal surgery
- MeSH:
Acoustics*;
Edema;
Humans;
Noise;
Polyps;
Prognosis;
Speech Therapy;
Vocal Cords*;
Voice
- From:Korean Journal of Otolaryngology - Head and Neck Surgery
1998;41(7):925-928
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
BACKGROUND AND OBJECTIVES: Benign vocal cord lesions that are not responsive to medical and/or speech therapy are often treated by microlaryngeal surgery. The purpose of this study is to measure selected acoustic parameters to document quantitative changes in vocal quality before and after microlaryngeal surgery and to analyze differences of prognosis for various benign vocal cord lesions, such as vocal cord polyp, vocal cord nodule, and Reinke's edema. MATERIALS AND METHODS: The authors used a computerized acoustic analysis program (CSL-MDVP) to measure mean fundamental frequency (Fo), jitter, shimmer, and noise to harmonics ratio (NHR) from voice samples of selected patients who had benign vocal cord lesions before and after at least 10 weeks of surgery. RESULTS: The values of Fo and NHR showed no significant difference in all three groups. There was significant improvement in nodule regarding jitter. Also, there was significant improvement in the vocal cord polyp regarding jitter and shimmer. CONCLUSION: Jitter and shimmer will be effective acoustic parameters in documenting the quantitative changes in vocal quality before and after microlaryngeal surgery.
