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Maximum vocal intensity as a primary outcome measure in unilateral vocal fold paralysis patients

Published online by Cambridge University Press:  14 December 2020

S F Johari ,
M Azman ,
A S Mohamed  and
M M Baki
S F Johari
Affiliation:
Department of Otorhinolaryngology – Head and Neck Surgery, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
M Azman
Affiliation:
Department of Otorhinolaryngology – Head and Neck Surgery, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
A S Mohamed
Affiliation:
Department of Otorhinolaryngology – Head and Neck Surgery, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
M M Baki*
Affiliation:
Department of Otorhinolaryngology – Head and Neck Surgery, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
*
Author for correspondence: Professor Dr Marina Mat Baki, Department of Otorhinolaryngology – Head and Neck Surgery, Faculty of Medicine, University Kebangsaan Malaysia, 56000 Cheras, Kuala Lumpur, Malaysia E-mail: marinamatbaki@ppukm.ukm.edu.my Fax: +60 3914 56675
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Abstract

Objective

To evaluate voice intensity as the primary outcome measurement when treating unilateral vocal fold paralysis patients.

Methods

This prospective observational study comprised 34 newly diagnosed unilateral vocal fold paralysis patients undergoing surgical interventions: injection laryngoplasty or medialisation thyroplasty. Voice assessments, including maximum vocal intensity and other acoustic parameters, were performed at baseline and at one and three months post-intervention. Maximum vocal intensity was also repeated within two weeks before any surgical interventions were performed. The results were compared between different time points and between the two intervention groups.

Results

Maximum vocal intensity showed high internal consistency. Statistically significant improvements were seen in maximum vocal intensity, Voice Handicap Index-10 and other acoustic analyses at one and three months post-intervention. A significant moderate negative correlation was demonstrated between maximum vocal intensity and Voice Handicap Index-10, shimmer and jitter. There were no significant differences in voice outcomes between injection laryngoplasty and medialisation thyroplasty patients at any time point.

Conclusion

Maximum vocal intensity can be applied as a treatment outcome measure in unilateral vocal fold paralysis patients; it can demonstrate the effectiveness of treatment and moderately correlates with self-reported outcome measures.

Keywords

Unilateral Vocal Cord ParalysisDysphoniaVoiceOutcome MeasuresAcoustics
Type
Main Articles
Information
The Journal of Laryngology & Otology , Volume 134 , Issue 12 , December 2020 , pp. 1085 - 1093
Copyright
Copyright © JLO (1984) Limited, 2020

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Footnotes

Professor Dr M M Baki takes responsibility for the integrity of the content of the paper

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