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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
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

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.

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Type
Main Articles
Copyright
Copyright © JLO (1984) Limited 1999

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