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Acoustic evaluation of Isshiki type III thyroplasty for treatment of mutational voice disorders

Published online by Cambridge University Press:  29 June 2007

Guo-Dong Li ,
Liancai Mu  and
Shilin Yang
Guo-Dong Li
Affiliation:
Liaoning Voice Center, Department of Otolaryngology, 2nd Affiliated Hospital, China Medical University, Shenyang, P.R., China
Liancai Mu*
Affiliation:
Grabscheid Voice Center, Department of Otolaryngology, The Mount Sinai Medical Center, New York, N.Y., USA.
Shilin Yang
Affiliation:
Liaoning Voice Center, Department of Otolaryngology, 2nd Affiliated Hospital, China Medical University, Shenyang, P.R., China
*
Address for correspondence: Liancai Mu, M.D., Ph.D., Department of Otolaryngology, Box 1189, The Mount Sinai Medical Center, New York, NY 10029-6574, USA. Fax: (212) 831-3700
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Abstract

The goal of this study was to determine if there are acoustical differences between pre- and post-surgical voices and to evaluate the effectiveness of Isshiki type III thyroplasty in 11 male patients with mutational voice disorders. Acoustic measures were obtained both pre- and post-operatively. A comparison of pre-and post-operative fundamental frequency (Fo), voice frequencies, and vocal intensity obtained from a sustained vowel /i/ during different phonatory tasks was made. The results from the present study demonstrated that after operation the voice frequencies were significantly decreased (p<0.05). The vocal intensity tended to reduce slightly as the voice frequency lowered. However, there were no statistically significant differences in the pre- and post-operative measures of vocal intensity (p>0.5). The preoperative high pitched voices of all the male patients were lowered up to the normal value by the type III thyroplasty.

Keywords

Voice disordersVoice qualityVoicesurgery
Type
Main Articles
Information
The Journal of Laryngology & Otology , Volume 113 , Issue 1 , January 1999 , pp. 31 - 34
Copyright
Copyright © JLO (1984) Limited 1999

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