A non-invasive instrument was developed for measuring respiratory acoustic impedance(RAI) in frequency range of 0.125 to 256Hz. In order to enlarge frequency spectrum for acquisition of valuable information from RAI estimation , novel helmet-type peneumotachograph was developed. The system capable of separate estimation of RAI of low/high frequency was tested by physical simulation. On the basis of experimental results and theoretical predictions, it is believed that RAI measurement by spectral analysis can significantly improve estimation of contribution to RAI from different parts of respiratory tract. The outcome is of considerable interest in the study of lung disease, such as COPD, asthma and acute cardiac failure.
|Original language||English (US)|
|Number of pages||14|
|Journal||Chinese Journal of Biomedical Engineering|
|State||Published - Jan 1 1992|
ASJC Scopus subject areas
- Medicine (miscellaneous)
- Biomedical Engineering