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Phonatory threshold pressure in a healthy population before and after aerosol treatment, a preliminary study.

Authors
  • Grini-Grandval, M N
  • Bingenheimer, S
  • Maunsell, R
  • Ouaknine, M
  • Giovanni, A
Type
Published Article
Journal
Revue de laryngologie - otologie - rhinologie
Publication Date
Jan 01, 2002
Volume
123
Issue
5
Pages
311–314
Identifiers
PMID: 12741292
Source
Medline
License
Unknown

Abstract

The viscosity of the surface mucus of the vocal cords is one of the important elements for good laryngeal functioning. It has been demonstrated that inhalation of hydrated air increases the phonatory threshold pressure by decreasing viscosity of the mucus (1) leading to a more regular vibration that can be appreciated by jitter (2). In an attempt to correlate the concepts of tissue viscosity and surface mucus considering the theoretical model of vibration we measured the phonatory threshold pressure in 6 healthy female subjects before and after aerosol treatment. We were able to demonstrate that the pressure threshold is lower (3.15 hPa) after aerosol treatment than before (3.79 hPa) and this was statistically significant (p: 0.041). The discussion is based on this decrease of mucus viscosity applied to the physiological concepts necessary to understand glottic vibration.

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