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Pathological changes of hyperphonated cat vocal folds.

R Zhao1, Y Cai, H Wang

  • 1Department of Otolaryngology, Affliated Hospital of Zhejiang College of Traditional Chinese Medicine, Hangzhou, People's Republic of China.

Auris, Nasus, Larynx
|January 1, 1991
PubMed
Summary
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Excessive vocal fold use, or hyperphonation, causes liquid buildup beneath the vocal fold lining. Prolonged hyperphonation also leads to epithelial thickening and acute laryngitis in cats.

Area of Science:

  • Veterinary Pathology
  • Laryngology
  • Animal Models

Background:

  • Hyperphonation, or excessive vocal fold use, can lead to vocal fold pathologies.
  • Understanding these changes is crucial for diagnosing and treating voice disorders.

Purpose of the Study:

  • To investigate the pathological alterations in vocal folds due to induced hyperphonation in a feline model.
  • To establish a timeline for the development of these pathological changes.

Main Methods:

  • Fifteen cats underwent induced hyperphonation via mechanical stimuli for up to 15 weeks.
  • Laryngeal tissues were harvested and subjected to gross and microscopic examination.

Main Results:

  • All experimental animals exhibited liquid exudate accumulation beneath the vocal fold epithelium.

Related Experiment Videos

  • Epithelial thickening was observed in cats with hyperphonation exceeding 4 weeks.
  • Three cats developed acute laryngitis.

    • Conclusions:

    • Induced hyperphonation in cats leads to characteristic pathological changes in the vocal folds.
    • Early changes include submucosal fluid accumulation, followed by epithelial thickening and inflammation with prolonged exposure.