Airway obstruction degree estimation using forced oscillation technique-a model study

Author

Yen, Fu-Chung ; Behbehani, Khosrow ; Lucas, Edgar A. ; Burk, John R.

Author_Institution

Biomed. Eng. Dept., Texas Univ., Arlington, TX, USA

Volume

5

fYear

1997

fDate

1997

Firstpage

2254

Abstract

A non-invasive method based on forced oscillation technique to estimate the airway obstruction degree (AOD) has been developed. AOD was estimated by analyzing oscillated nasal pressure and airflow signals generated using a continuous positive airway pressure (CPAP) device and a loudspeaker. The concept of estimating AOD was tested using a mechanical model of the respiratory system with known airway resistance. Six representative airway models with diameters ranging from 3.2 mm (⅛") to 12.7 mm (½") were tested. The results showed that AOD was well correlated with the analytical calculation of the airway resistance (R²=0.99). This technique can be easily incorporated in a CPAP machine, since it was designed to be compatible with CPAP therapy equipment

Keywords

biomedical measurement; frequency estimation; physiological models; pneumodynamics; sleep; 3.2 to 12.7 mm; airflow signals; airway obstruction degree estimation; continuous positive airway pressure device; forced oscillation technique; mechanical model; noninvasive method; obstructive sleep apnoea; oscillated nasal pressure signals; respiratory system; therapy equipment compatibility; Biomedical engineering; Filters; Frequency; Immune system; Instruments; Loudspeakers; Medical treatment; Respiratory system; Signal generators; Sleep apnea;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1997. Proceedings of the 19th Annual International Conference of the IEEE

Conference_Location

Chicago, IL

ISSN

1094-687X

Print_ISBN

0-7803-4262-3

Type

conf

DOI

10.1109/IEMBS.1997.758809

Filename

758809