Journal article
Estimating Subglottal Pressure via Airflow Redirection
The Laryngoscope, Vol.117(8), pp.1491-1495
08/2007
DOI: 10.1097/mlg.0b013e318063e89e
PMID: 17762273
Abstract
Subglottal pressure (SGP) is a valuable parameter in the research and clinical assessment of laryngeal function. The lungs serve as a constant pressure source during sustained phonation, and that pressure, SGP, can be used to determine the efficiency with which the larynx converts aerodynamic power to acoustic power. As the larynx serves as an aerodynamic transducer, the vocal efficiency (Ve) coefficient, defined as acoustic power (dB) divided by aerodynamic power (SGP × glottal airflow) has been shown to reliably reflect vocal health. However, current SGP measurement techniques are hesitantly used because of either an invasive nature or the requirement of intensive patient training. This study tests a novel device that has been designed to noninvasively estimate SGP through mechanical airflow redirection, producing a numeric output on completion of the trial, which lasts only a few seconds. The novelty of this design lies in the ease of use for both the patient and the clinician. Multiple mechanical airflow redirections occlude the airway for only 135 ms, which is predicted to limit the effect of confounding laryngeal reflexes that may occur during the trials. Additionally, the airflow redirection into a retention device allows for the pneumatic in-trial comparison of the estimated SGP with the pressure achieved by the patient, providing a numeric output to the clinician on completion. © The American Laryngological, Rhinological & Otological Society, Inc.
Details
- Title: Subtitle
- Estimating Subglottal Pressure via Airflow Redirection
- Creators
- Christopher D. Baggott - University of Wisconsin–MadisonAlexander K. Yuen - University of Wisconsin–MadisonMatthew R. Hoffman - University of Wisconsin School of Medicine and Public HealthLiang Zhou - Fudan UniversityJack J. Jiang - Fudan University
- Resource Type
- Journal article
- Publication Details
- The Laryngoscope, Vol.117(8), pp.1491-1495
- Publisher
- John Wiley & Sons, Inc
- DOI
- 10.1097/mlg.0b013e318063e89e
- PMID
- 17762273
- ISSN
- 0023-852X
- eISSN
- 1531-4995
- Number of pages
- 5
- Language
- English
- Date published
- 08/2007
- Academic Unit
- Otolaryngology
- Record Identifier
- 9984366380202771
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