Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Kosin University, Busan, Korea.
Corresponding Author: Joo Yeon Kim, Department of Otolaryngology-Head and Neck Surgery, Kosin University, College of Medicine, 34, Amnam-dong, Seo-gu, Busan 602-702, Korea. TEL: +82-51-990-6248, FAX: +82-51-245-8539, oooo95@hanmail.net
• Received: May 24, 2012 • Revised: July 11, 2012 • Accepted: September 28, 2012
Many people have been concerned about voice change after tonsillectomy. The purpose of this study is to analyze changes in the voice and to think about changes in the vocal tract after surgery by using CSL-MDVP.
Methods
Data of 27 patients who underwent tonsillectomy were prospectively evaluated. Acoustic analysis was performed before, after 1 week, after 1 month from the surgery. Nasometer was also conducted.
Results
In acoustic analysis, there were no significant changes in F0, jitter, shimmer, NHR, VTI, SPI. But vAM was statistically increased. Vowels and nasal consonants formant frequency analysis results in patients showed no statistically correlation in 1months after tonsillectomy. Although the statistically increased in the nasal consonants /하나/.
Conclusions
Although the temporary increase or decrease in the acoustic factor or formant in the vowels and nasal consonants after tonsillectomy, but most factors are make no difference. The voice change that come postoperatively could be considered as no concern, but surgeons need to aware of various facts, which can affect voice changes before the surgery.
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Table 1
Age and sex distribution (n=27)
Table 2
The change of voice parameters before, 1 weeks and 1 months after tonsillectomy and adenoidectomy
*P < 0.05: compared with pre op
Table 3
Mean value of formant frequencies of vowels and nasal consonants
*P < 0.05 : compared with pre op
*F1, F2: First and second formant frequency, respectively