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"Aerodynamic Study for Laryngeal Function Assessment Using Airflow Interruption Methods"

Funding:
National Institutes of Health
Principal Investigator
Jack Jiang, MD,PhD.

Project Summary:

Current technology used to assess laryngeal function is often qualitative or invasive. While techniques such as electroglottography, videostroboscopy, and acoustic analysis can evaluate vibration output, they do not provide insight into the inputs of voice production. Measuring the aerodynamic parameters of subglottal pressure (SGP) and airflow allows clinicians to determine the effort with which patients produce voice. Incorporating these quantitative measurements offers a more comprehensive picture of vocal function.

This study has two parts. Part I will focus on developing novel devices which can measure the aerodynamic parameters of the voice and testing their efficacy on normal subjects. Parameters of interest include: subglottal pressure (SGP), airflow, phonation threshold pressure (PTP), phonation threshold flow (PTF), vocal efficiency (VE), and phonation threshold power (PTPw). PTF and PTPw are novel parameters proposed and developed theoretically by our laboratory which could be more sensitive in detecting vocal disorders than currently used parameters. The novel devices employed in the measurement of these parameters are an extension of the airflow interruption system (Jiang et al., 1999) which uses mechanical interruption when measuring subject SGP. Part II will measure the aerodymic parameters of subjects with voice disorders. Doing this will demonstrate the clinical utility of the airflow interrupter and its ability to differentiate normal and disordered voice production.

 

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Otolaryngology Surgery University of Wisconsin Department of Surgery
First published: 07/15/02 Last updated: 11/23/09 webmaster@surgery.wisc.edu
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