CC BY-NC-ND 4.0 · Laryngorhinootologie 2021; 100(S 02): S259
DOI: 10.1055/s-0041-1728565
Abstracts
Phoniatrics

Medialization of the ailing vocal fold by means of thyroarytenoid muscle electrostimulation

MM. Hess
1   Medical Voice Center (MEVOC), Hamburg
,
G Förster
2   SRH Wald-Klinikum, Klinik für Hals-Nasen-Ohrenheilkunde/Plastische Operationen, Gera
,
A Böttcher
3   Universitätsklinikum Hamburg-Eppendorf, Klinik und Poliklinik für Hals-, Nasen- und Ohrenheilkunde, Hamburg
,
A Müller
2   SRH Wald-Klinikum, Klinik für Hals-Nasen-Ohrenheilkunde/Plastische Operationen, Gera
› Author Affiliations
 
 

    Introduction Laryngeal framework surgery is the current golden standard for surgical treatment for unilateral vocal fold paralysis (UVFP). Recently electrostimulation of the thyroarytenoid muscle (TA) has been assessed as potential alternative both in animal models (canine) and in clinical setting. The aim of our work is to determine whether the TA or the Recurrent Laryngeal Nerve (RLN) electrical stimulation in UVFP patient could elicit an effective medialization of the ailing VF.

    Material and Methods 7 adult UVFP patients were recruited to the study to test the effects of TA electrostimulation during a standard medialization surgery. Stimulation was delivered between 0.1 and 10 mA; at a frequency of 25-40 Hz; and with a pulse width (PW) between 0.1 and 1 ms. The ailing VF response to the stimulation recorded through laryngoscopy was videotaped.

    Results 2/7 (28.6 % ) subjects were withdrawn for non-compliance with the selection criteria. The ailing TA was stimulated in 5/7 patients (71.4 % ). No safety issues occurred. Stimulation with an amplitude of 2.5-3 mA; a PW of 1ms; a frequency of 30 Hz elicited a partial medialization of the ailing VF in 3/5 (60 % ) patients.

    Conclusions First results showed that TA electrostimulation can induce partial adduction of the ailing VF in anesthetized patients, although insufficient to induce its complete medialization. Whether in awaken patients or by conditioning of the paralyzed muscle via training, a complete medialization can be obtained will be evaluated in the course of this and next studies, also considering different laryngeal muscles as targets.

    Poster-PDF A-1316.pdf

    MED-EL Elektromedizinische Geräte GmbH


    #

    Conflict of interest

    Der Erstautor gibt keinen Interessenskonflikt an.

    Address for correspondence

    Prof. Dr. med. Hess Markus M.
    Medical Voice Center (MEVOC)
    Hamburg

    Publication History

    Article published online:
    13 May 2021

    © 2021. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

    Georg Thieme Verlag KG
    Rüdigerstraße 14, 70469 Stuttgart, Germany