Title :
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
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;
Conference_Titel :
Engineering in Medicine and Biology Society, 1997. Proceedings of the 19th Annual International Conference of the IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-4262-3
DOI :
10.1109/IEMBS.1997.758809
