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Endolaryngeal contact pressures

M M Hess1, K Verdolini, W Bierhals

  • 1Department of Audiology and Phoniatrics, Benjamin Franklin Medical Center, Freie Universität Berlin, Germany.

Journal of Voice : Official Journal of the Voice Foundation
|June 10, 1998
PubMed
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This study introduces a novel method for measuring in vivo endolaryngeal contact pressure. Results show higher pressures between arytenoids than vocal folds, especially during forceful tasks like gagging and hard glottal attacks.

Area of Science:

  • Laryngology
  • Bioengineering
  • Speech Science

Background:

  • Accurate measurement of endolaryngeal contact pressure is crucial for understanding voice disorders.
  • Previous methods have limitations in capturing in vivo pressures during various physiological tasks.

Purpose of the Study:

  • To present a new methodology for in vivo endolaryngeal contact pressure measurement using a miniature pressure transducer.
  • To investigate endolaryngeal contact pressures during phonatory and nonphonatory tasks in adults.

Main Methods:

  • A novel method employing a miniature pressure transducer for in vivo endolaryngeal contact pressure measurement was developed.
  • Contact pressures were measured using videoendoscopy at the arytenoids and vocal folds in 22 adult subjects (20 with voice disorders, 2 healthy).

Related Experiment Videos

  • Measurements were taken during phonatory tasks (varying pitch, loudness, onset/offset) and nonphonatory tasks (throat clearing, coughing, Valsalva, gagging).

    • Main Results:

    • Interarytenoid contact pressures were significantly greater than intraglottal (vocal fold) contact pressures.
    • Interarytenoid pressures decreased with increasing pitch.
    • Both interarytenoid and intraglottal pressures were markedly elevated during hard glottal attacks.
    • The highest endolaryngeal pressures were recorded between the arytenoids during thoracic fixation and gag reflex.

    Conclusions:

    • The developed method allows for precise in vivo measurement of endolaryngeal contact pressures during diverse laryngeal activities.
    • Contact pressure dynamics vary significantly with pitch, phonatory effort, and nonphonatory laryngeal actions.
    • Findings provide valuable insights into the biomechanics of the larynx and may inform the diagnosis and treatment of voice disorders.