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Impact of unilateral carbon dioxide laser posterior transverse cordotomy on vocal and aerodynamic parameters in bilateral vocal fold paralysis

Published online by Cambridge University Press:  18 March 2016

M B Asik*
Affiliation:
Department of Otolaryngology – Head and Neck Surgery, Gulhane Military Medical Academy, Ankara, Turkey
O Karasimav
Affiliation:
Department of Sports Medicine, Gulhane Military Medical Academy, Ankara, Turkey
H Birkent
Affiliation:
Department of Otolaryngology – Head and Neck Surgery, Gulhane Military Medical Academy, Ankara, Turkey
A L Merati
Affiliation:
Department of Otolaryngology – Head and Neck Surgery, University of Washington, Seattle, USA
M Gerek
Affiliation:
Department of Otolaryngology – Head and Neck Surgery, Gulhane Military Medical Academy, Ankara, Turkey
Y Yildiz
Affiliation:
Department of Sports Medicine, Gulhane Military Medical Academy, Ankara, Turkey
*
Address for correspondence: Dr M Burak Asik, Gulhane Askeri Tip Akademisi, KBB AD, 06018 Etlik, Ankara, Turkey E-mail: [email protected]

Abstract

Objectives:

Carbon dioxide laser posterior transverse cordotomy is a common option for bilateral vocal fold paralysis. This study prospectively evaluated aerodynamic and acoustic effects of unilateral carbon dioxide laser posterior transverse cordotomy in bilateral vocal fold paralysis patients.

Methods:

The study comprised 11 bilateral vocal fold paralysis patients (9 females, 2 males), with a mean age of 46.6 ± 14.1 years. All patients were treated by laser posterior transverse cordotomy. Pre-operative and two-month post-operative assessments were conducted, including: dyspnoea scales, maximum phonation time measurement, spirometry and bicycle ergometry.

Results:

All subjective and objective aerodynamic parameters showed statistically significant improvements between the pre- and post-operative period. Objective spirometric and ergometric parameters showed a significant increase post-operatively. The changes in objective voice parameters (fundamental frequency (f0), jitter, shimmer, soft phonation index and noise-to-harmonic ratio) were statistically non-significant; however, there was a significant improvement in subjective voice parameters post-operatively, as assessed by the voice handicap index and grade-roughness-breathiness-asthenia-strain scale (p = 0.026 and p = 0.018 respectively).

Conclusion:

Unilateral carbon dioxide laser posterior transverse cordotomy is an effective procedure that results in improved dyspnoea and aerodynamic performance with some worsening of voice parameters.

Type
Main Articles
Copyright
Copyright © JLO (1984) Limited 2016 

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Footnotes

Presented orally at the Fall Voice Conference, 23–25 October 2014, San Antonio, Texas, USA.

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