NDLI: Acoustic Response of Arteries Using Thick Wall Tube Assumption

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Al-Jumaily, A. M. Al-Ammri, A. Salam
Copyright Year	2009
Abstract	This paper describes the pressure wave propagation and reflection phenomenon in the aorta and the brachial artery to reproduce the brachial artery pressure and the strain imposed on the cuff external wall using thick wall tube assumption for the aorta. The effects of variations in aortic radius, thickness, heart rate and cuff pressure on the brachial artery pressure contours and pneumatic cuff strain contours were investigated The thick wall tube assumption for the aorta will improve the accuracy of the results and give an indication about the error involved when using thin wall tube assumption. The results indicate that there are some differences between the trends and shapes of the curves when using thick wall assumption. This difference could be as high as 3% for the eight feature points extracted from the pressure and strain contours. These feature points are the time duration before the deflection marking the arrival of the incident and reflected wave, the peak of the first and second pressure deflection minus the diastolic pressure, the peak of the first and second strain deflection minus the strain at diastolic pressure. These features points are used to calculate the brachial augmentation indices and the time lag which are used as a measure of arterial stiffness.
Starting Page	439
Ending Page	442
Page Count	4
File Format	PDF
ISBN	9780791843758
DOI	10.1115/IMECE2009-12271
e-ISBN	9780791838631
Volume Number	Volume 2: Biomedical and Biotechnology Engineering
Conference Proceedings	ASME 2009 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2009-11-13
Publisher Place	Lake Buena Vista, Florida, USA
Access Restriction	Subscribed
Subject Keyword	Errors Wave propagation Deflection Aorta Acoustics Reflection Stiffness Shapes Pressure Waves Thin wall structures
Content Type	Text
Resource Type	Article

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