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Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp
Published on: February 3, 2014
Aerodynamics of the pseudo-glottis
M N Kotby1, M A Hegazi, I Kamal
1Unit of Phoniatrics, Faculty of Medicine, Ain Shams University, Cairo, Egypt. nkotby@cng.com.eg
Summary
This study quantifies pseudo-glottis aerodynamic parameters in total laryngectomy patients. Results reveal differences compared to the true glottis, offering insights for pseudo-voice training.
Area of Science:
- Laryngology
- Aerodynamics
- Speech Science
Background:
- Total laryngectomy necessitates alternative voice production methods.
- The pseudo-glottis, created via tracheo-esophageal prosthesis, is crucial for esophageal voice.
- Aerodynamic parameters of the pseudo-glottis remain incompletely understood.
Purpose of the Study:
- To investigate aerodynamic parameters of the pseudo-glottis post-total laryngectomy.
- To measure airflow rate, sub-pseudo-glottic pressure (SubPsG), and sound pressure level (SPL).
- To compare pseudo-glottic data with normative values from the true glottis.
Main Methods:
- Studied 18 male patients (54-72 years) who underwent total laryngectomy.
- All patients were fluent esophageal voice speakers using a tracheo-esophageal prosthesis.
- Measured airflow rate, SubPsG, and SPL.
Main Results:
- Mean airflow rate: 53 ml/s (vs. 89 ml/s for true glottis).
- Mean SubPsG: 13 cm H2O (vs. 7.9 cm H2O for true glottis).
- Mean SPL: 66 dB (vs. 70 dB for true glottis).
Conclusions:
- Pseudo-glottic aerodynamic data differs significantly from the true glottis.
- Findings provide insight into pseudo-glottis function.
- Data suggests potential clinical applications for pseudo-voice training.
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