Clinical Investigation of the effects of surface neuromuscular electrical stimulation on subjects with unilateral vocal fold paralysis at the median and paramedian positions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61384984%3A51110%2F22%3AN0000110" target="_blank" >RIV/61384984:51110/22:N0000110 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Clinical Investigation of the effects of surface neuromuscular electrical stimulation on subjects with unilateral vocal fold paralysis at the median and paramedian positions

Original language description

Neuromuscular electrical stimulation (NMES) is an established treatment method for neurogenic disorders. For voice therapy, NMES is commonly applied using predetermined electrode placement with 80 Hz as the frequency of stimulation. However, a modified approach has recently been used where smaller electrodes targeting the cricothyroid muscles are used for improving glottal adduction and raising the fundamental frequency of the voice. The aims of this study were to assess and contrast the effectiveness of this modified approach on two different types of unilateral vocal fold paralysis (UVFP). Two subjects with UVFP underwent a 12-minute-long NMES session, once a day for five days. Acoustic, electroglottographic, self-perceived assessment, maximum phonation time and relative fundamental frequency measures were carried out. Five seconds of work-rest time with 3-seconds of ramp time at amplitudes between 4.5 to 5.5 mA was used at 10 and 80 Hz. 10 Hz was used on days 1, 3 and 5 and 80 Hz used in the remaining days. Pre versus pro analysis revealed an overall daily improvement in acoustic data and MPT for both subjects. The subject with UVFP in the paramedian position showed better results with greater improvement from baseline values. The participants’ voice improved, and they reported that the treatment was not painful. They also reported a positive proprioceptive feeling of the larynx and stronger and more sonorous voice immediately after intervention. The use of short surface NMES sessions for UFVP was shown to have a positive effect on voice quality. Likely due to the electrode placement used in this study, changes were more significant for the subject with the vocal folds paralysed in the paramedian position. The NMES method used in this study is well suited for this specifi configuration of the UVFP, and additional electrode placements should be used with subjects in which the vocal folds are paralysed more medially.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

30206 - Otorhinolaryngology

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů