Indian Journal of Science and Technology
Year: 2016, Volume: 9, Issue: 2, Pages: 1-5
P. Vimal Prabhu1 , J. Sivaraman2 , S. Sathish2 , S. Vinurajkumar2 and K. Manikandan2
1Department of Biomedical Engineering, Indian Institute of Technology, Hyderabad - 502285, Telangana, India; [email protected] 2Department of Biomedical Engineering, Vel Tech MultiTech, Chennai - 600062, Tamil Nadu, India; [email protected], sa[email protected], [email protected], [email protected]
Objectives: This study analyzes the dilation and constriction (elastic) properties of blood vessels using a non invasive Photoplethysmography method. The dilation and constriction of blood vessel changes as a function of aging which can be analyzed using the shape of Phototplethsymogram. Methods: A preliminary test is conducted in twenty sinus rhythm subjects in the range between 20 to 73 years. Findings: The parameters like peak ratio, time ratios, valley to peak ratio, stiffness index and augmentation index are the indices to determine the dilation and constriction properties of the blood vessels. Applications/Improvements: The above parameters are evaluated with the help of appropriate hardware and software. Neural networks is trained using these parameters to classify the level of elasticity, using which the abnormalities such as Atherosclerosis, aortic stenosis, aortic regurgitation can be diagnosed.
Keywords: Atherosclerosis, Dicrotic Notch, Peak Ratio, Photoplethysmography, Sinus Rhythm
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