The filter processing in forced oscillation respiratory impedance measurements
10.3969/j.issn.1005-202X.2001.01.022
- VernacularTitle:强迫振荡呼吸阻抗测量中的滤波处理
- Author:
Min HUANG
;
Qun XU
;
Mengrong LI
;
Shisu CHEN
- Publication Type:Journal Article
- From:
Chinese Journal of Medical Physics
2001;18(1):49-50
- CountryChina
- Language:Chinese
-
Abstract:
In the measurement of the forced oscillation respiratory impedance, we designed a narrow-band second-order band-pass comb filter which is centered at the forced oscillation frequencies for eliminating the interference of spontaneous breathing. The result shows that an increase of signal-to-noise ratio (SNR) reaches 6.0 dB, and keeps it almost constant over the whole frequency band when compared with a conventional high-pass filtering. So we can assess correctly the impedance of respiratory system.
