Authors: Med Anes Bereksi-Reguig; F. Bereksi-Reguig
Addresses: Biomedical Engineering Research Laboratory, Faculty of Technology Department of Biomedical Engineering, University of Tlemcen, Chetouane, Algeria ' Biomedical Engineering Research Laboratory, Faculty of Technology Department of Biomedical Engineering, University of Tlemcen, Chetouane, Algeria
Abstract: This study analyses and processes the photoplethysmographic (PPG) signal waveform in order to evaluate the arterial stiffness. In fact the PPG signal carries out some determinant physiological parameters which are used in evaluating arterial stiffness. These parameters are determined through the processing and analysis of the PPG signal. The determined physiological parameters are the augmentation index AI and the b/a ratio. The work is in fact related to the determination and the analysis of the AI and the b/a ratio. The acquired PPG signal is first filtered using the Undecimated Wavelet Transform (UWT), then its second derivative is calculated followed by a detection of peak and valleys in order to determine AI and b/a ratio. These parameters are then evaluated and analysed for different subjects healthy and pathologic. The obtained result shows that the AI and the b/a ratio are not in the same argument for the healthy and pathologic subject.
Keywords: PPG signals; undecimated wavelet transform; UWT; PPG signal derivative; augmentation index; b/a ratio; photoplethysmograms; signal processing; arterial stiffness; arteries.
International Journal of Biomedical Engineering and Technology, 2017 Vol.23 No.2/3/4, pp.363 - 378
Received: 03 Jun 2016
Accepted: 25 Nov 2016
Published online: 25 Feb 2017 *