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Minimally Invasive Murine Laryngoscopy for Close-Up Imaging of Laryngeal Motion During Breathing and Swallowing
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Glottal Features in Vocal Assessment Following Thyroidectomy.

Malek Mnejja1, Sofia Ben Jebara2, Mariam Ben Ayed1

  • 1Department of Otorhinolaryngology Head and Neck Surgery, Habib Bourguiba Hospital, Sfax, Tunisia; University of Sfax, Sfax Medical School, LR23ES01 Laboratory, Sfax, Tunisia.

Journal of Voice : Official Journal of the Voice Foundation
|March 29, 2024
PubMed
Summary

Thyroidectomy can cause vocal dysfunction, impacting quality of life. Analyzing glottal flow features offers a new way to objectively assess these vocal changes after surgery.

Keywords:
Glottal featuresThyroidectomyVoice

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Area of Science:

  • Otolaryngology
  • Speech-Language Pathology
  • Acoustic Analysis

Background:

  • Vocal dysfunction is a common complication after thyroidectomy, negatively affecting patients' quality of life.
  • While acoustic features of voice have been studied, glottal flow characteristics post-thyroidectomy remain under-researched.
  • Objective assessment of vocal outcomes following thyroid surgery is crucial.

Purpose of the Study:

  • To evaluate early and short-term vocal outcomes after thyroidectomy.
  • To analyze glottal acoustic features during speech production to assess vocal changes.
  • To establish the reliability of glottal feature analysis for detecting post-thyroidectomy vocal dysfunction.

Main Methods:

  • Prospective analytical study of 39 patients undergoing thyroidectomy.
  • Glottal flow features (e.g., Open Quotients, Speed Quotients) extracted from vocal recordings pre-surgery and at Day 1 and Month 1 post-surgery.
  • Signal processing techniques used for feature extraction and analysis.

Main Results:

  • Significant decreases observed in Open Quotient 2 (OQ2) and Quasi-open quotient (QoQ) at Day 1 and Month 1.
  • Significant decreases in Open Quotient 1 (OQ1) and Normalized Amplitude Quotient (NAQ) at Month 1.
  • Decreased Speed Quotient 2 (SQ2) significantly at both Day 1 and Month 1; this correlated with increased Voice Handicap Index-10 (VHI-10).

Conclusions:

  • Glottal acoustic feature analysis is a reliable method for detecting vocal changes post-thyroidectomy.
  • Thyroidectomy is associated with vocal dysfunction, characterized by reduced open, amplitude, and speed quotients.
  • Glottal features provide an objective tool to assess the impact of thyroidectomy on vocal fold dynamics.