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Related Experiment Videos

Vocal fold atrophy: quantitative glottic measurement and vocal function

K Omori1, D H Slavit, C Matos

  • 1Ames Vocal Dynamics Laboratory, Lenox Hill Hospital, New York, New York, USA.

The Annals of Otology, Rhinology, and Laryngology
|July 1, 1997
PubMed
Summary

Vocal fold atrophy with bowing does not decrease vibratory amplitude. Bilateral atrophy results in a smaller glottal gap, suggesting thyroplasty type I may benefit more from bilateral procedures for better outcomes.

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Area of Science:

  • Otolaryngology
  • Speech-Language Pathology
  • Vocal Fold Dynamics

Background:

  • Vocal fold atrophy and bowing are common causes of dysphonia.
  • Understanding glottic gap and vibratory characteristics is crucial for treatment planning.

Purpose of the Study:

  • To evaluate videostroboscopic glottic measurements and vocal function in patients with vocal fold atrophy and bowing.
  • To correlate glottic measurements with acoustic, aerodynamic, and perceptual vocal parameters.

Main Methods:

  • 41 patients with vocal fold atrophy and bowing underwent videostroboscopy.
  • Glottic gap area and vibratory amplitude were measured from digitized images.
  • Acoustic, aerodynamic, and perceptual vocal function parameters were assessed.

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Main Results:

  • Vibratory amplitude was not reduced in atrophic vocal folds.
  • Bilateral vocal fold atrophy created a smaller glottal gap than unilateral atrophy for similar bowing.
  • High-frequency power ratio and H-index correlated with glottal gap; mean flow rate correlated with bowing.
  • Dysphonia severity related to glottal gap size and bowing.

Conclusions:

  • Vocal fold atrophy is not disadvantageous for thyroplasty type I.
  • Bilateral procedures may offer superior outcomes compared to unilateral procedures for bilateral atrophy.
  • Glottic gap size and bowing are key determinants of vocal dysfunction in atrophy.