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01-06-2012

Prospective Electromyographic Evaluation of Functional Postthyroidectomy Voice and Swallowing Symptoms

Authors: Celestino P. Lombardi, Lucia D’Alatri, Maria R. Marchese, Daria Maccora, Mauro Lo Monaco, Carmela De Crea, Marco Raffaelli

Published in: World Journal of Surgery | Issue 6/2012

Abstract

Background

Voice and swallowing symptoms following thyroidectomy in the absence of any demonstration of laryngeal nerves injury are usually considered a functional outcome of uncomplicated operations, mainly related to scar formation and emotional reaction. They could be related to unapparent laryngeal nerve or cricothyroid (CT) muscle injuries detectable only by laryngeal electromyography (LEMG). We correlated such symptoms with LEMG patterns.

Methods

A total of 33 consenting patients undergoing total thyroidectomy (TT) were enrolled. Video-strobolaryngoscopy (VSL), acoustic voice analysis (AVA), and maximum phonation time (MPT) were performed preoperatively and 3 months postoperatively. Subjective evaluation of voice (Voice Impairment Score, or VIS) and swallowing (Swallowing Impairment Score, or SIS) were obtained preoperatively and 1 and 3 months postoperatively. At 1 month postoperatively LEMG was performed examining thyroarytenoid (TA) and CT muscles to evaluate the inferior laryngeal nerve (ILN) and the external branch of the superior laryngeal nerve (EBSLN), respectively.

Results

One patient experienced transient vocal cord palsy and was excluded. The remaining 32 patients completed the postoperative evaluation. No significant difference was found between preoperative and postoperative AVA and MPT parameters. Mean VIS was significantly worse than preoperatively 1 and 3 months after TT. No significant difference was found between preoperative and postoperative SIS. LEMG evaluation of TA muscle showed decreased voluntary activity and spontaneous fibrillation potentials in one patient. LEMG of the CT muscle did not reveal any sign of EBSLN injury.

Conclusions

Patients frequently complain of subjective symptoms early after TT. LEMG demonstrated the absence of subclinical laryngeal nerve injury in all but one patient, confirming their functional nature.

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Title: Prospective Electromyographic Evaluation of Functional Postthyroidectomy Voice and Swallowing Symptoms
Authors: Celestino P. Lombardi
Lucia D’Alatri
Maria R. Marchese
Daria Maccora
Mauro Lo Monaco
Carmela De Crea
Marco Raffaelli
Publication date: 01-06-2012
Publisher: Springer-Verlag
Published in: World Journal of Surgery / Issue 6/2012
Print ISSN: 0364-2313
Electronic ISSN: 1432-2323
DOI: https://doi.org/10.1007/s00268-012-1481-8

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Prospective Electromyographic Evaluation of Functional Postthyroidectomy Voice and Swallowing Symptoms

Abstract

Background

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

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