Journal article
Indirect Estimation of Laryngeal Resistance Via Airflow Redirection
Annals of otology, rhinology & laryngology, Vol.118(2), pp.124-130
02/01/2009
DOI: 10.1177/000348940911800208
PMCID: PMC2905655
PMID: 19326763
Abstract
Objectives: Our aim was to estimate aerodynamic parameters of laryngeal resistance (RL) and aerodynamic power indirectly from a subglottal pressure (Ps) data trace obtained with the airflow redirection system.
Methods: During airflow interruption, the airflow redirection tank fills capacitively with pressure until it reaches the Subject's Ps. Therefore, a time constant, T, can be extracted from the data trace and used to calculate RL. The validity of applying this method to the estimation of RL was demonstrated with a computer model. Estimations were made for values of 10, 20, 30 40, and 50 cm H2O per liter per second (L/s). Twenty subjects performed 10 trials on the experimental system designed to measure Ps. The values of RL and aerodynamic power were then calculated.
Results: The computer model simulation yielded a maximum measurement error of 3.00% and a mean error of 1.78%. In human subject testing, the mean +/- SD laryngeal resistance was 22.61 +/- 8.65 cm H2O per L/s, the mean Ps was 6.91 +/- 1.94 cm H2O, and the mean aerodynamic power was 0.247 +/- 0.170 kPa x (L/s).
Conclusions: The proposed method of data analysis enables a clinician to estimate RL and aerodynamic power from a single experimental trial designed to measure Ps. This technique provides the clinician with an aerodynamic function report that can be used to analyze patient health and treatment efficacy.
Details
- Title: Subtitle
- Indirect Estimation of Laryngeal Resistance Via Airflow Redirection
- Creators
- Adam L. Rieves - University of Wisconsin–MadisonMatthew R. Hoffman - University of Wisconsin School of Medicine and Public HealthJack J. Jiang - University of Wisconsin–Madison
- Resource Type
- Journal article
- Publication Details
- Annals of otology, rhinology & laryngology, Vol.118(2), pp.124-130
- Publisher
- Sage
- DOI
- 10.1177/000348940911800208
- PMID
- 19326763
- PMCID
- PMC2905655
- ISSN
- 0003-4894
- eISSN
- 1943-572X
- Number of pages
- 7
- Grant note
- R01 DC008153-04; R01 DC008153-03; R01 DC008153; R01 DC008153-01A2; R01 DC008153-02 / NIDCD NIH HHS; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute on Deafness & Other Communication Disorders (NIDCD) R01DC008153 / NATIONAL INSTITUTE ON DEAFNESS AND OTHER COMMUNICATION DISORDERS; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute on Deafness & Other Communication Disorders (NIDCD)
- Language
- English
- Date published
- 02/01/2009
- Academic Unit
- Otolaryngology
- Record Identifier
- 9984366366102771
Metrics
4 Record Views