Open    Access



Parameters Analysis of Gastric Motility Signals in Time Domain and Frequency Domain



Author(s)

Zhangyong Li, Likun Xu and Zhui Xu

Full-Text PDF XML     119 Views

DOI:10.17265/1934-7391/2012.01.003

Biomedical Engineering Research Centre, Chongqing University of Posts and Telecommunications, Chongqing 404100, China

In order to assess gastric motility, a new noninvasive method was addressed. Firstly, bio-impedance and stomach electric signals were recorded from the healthy control group and the pathologic stomach group. Wavelet transform was used to remove the influence of the heart activity signals. By analyzing and processing the two signals of the time domain and frequency domain, we get the corresponding parameters of the two groups. According to all the parameters, several verification tests have been carried out, from the result of the statistics, we can find that in both time and frequency domains, impedance signal and synchronize EGG (electrogastrogram) have some similar features. However synchronize EGG cannot be totally instead by gastric motility, especially in morbid state, EGG is not correspondence to impedance signal. The gastric contraction or gastric emptying is a complex procedure including electrical and mechanical activity. Electrical impedance (EIP) and the synchronous EGG should be analyzed together. In conclusion, the parameters have the value to evaluate gastric motility.

Gastric motility, signals, wavelet transform, time domain, frequency domain.