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Temporary voice changes after uncomplicated thyroidectomy

F Debruyne1, F Ostyn, P Delaere

  • 1Department of ENT, Head and Neck Surgery U.Z. KUL, Leuven, Belgium.

Acta Oto-Rhino-Laryngologica Belgica
|January 1, 1997
PubMed
Summary
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Thyroidectomy temporarily impacts voice pitch and quality, with significant changes observed in speaking fundamental frequency (SFo) and vocal jitter shortly after surgery. Voice function typically normalizes within three months post-thyroidectomy.

Area of Science:

  • Otolaryngology
  • Speech Science
  • Acoustic Analysis

Background:

  • Thyroidectomy is a common surgical procedure.
  • Vocal fold motility is crucial for voice production.
  • Post-surgical voice changes can impact patient quality of life.

Purpose of the Study:

  • To investigate voice alterations following thyroidectomy in patients with preserved vocal fold function.
  • To quantify changes in acoustic voice parameters before and after surgery.
  • To establish the timeline for voice recovery after thyroidectomy.

Main Methods:

  • Acoustic analysis of speaking voice in 47 patients.
  • Phonetography to assess voice limits in 17 patients.
  • Measurement of eight voice parameters, comparing pre- and postoperative values.

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Main Results:

  • Speaking fundamental frequency (SFo) and pitch range decreased post-surgery, normalizing within three months.
  • Vocal quality, indicated by jitter and harmonics, was altered initially but normalized within two weeks.
  • Phonetogram measures showed reduced maximal intensity and pitch post-surgery, with progressive recovery.

Conclusions:

  • Thyroidectomy causes temporary, measurable changes in voice pitch and quality.
  • Most voice parameters return to preoperative levels within three months.
  • Understanding these temporary voice changes is important for patient counseling after thyroidectomy.