Flow-induced vibration analysis of constricted artery models with surrounding soft tissue

Date

2017-10-01

Author

Salman, Huseyin Enes
Yazıcıoğlu, Yiğit

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

259
views

0
downloads

Arterial stenosis is a vascular pathology which leads to serious cardiovascular diseases. Blood flow through a constriction generates sound and vibration due to fluctuating turbulent pressures. Generated vibro-acoustic waves propagate through surrounding soft tissues and reach the skin surface and may provide valuable insight for noninvasive diagnostic purposes. Motivated by the aforementioned phenomena, vibration of constricted arteries is investigated employing computational models. The flow-induced pressure field in an artery is modeled as broadband harmonic pressure loading based on previous studies in the literature and applied on the inner artery wall. Harmonic analysis is performed for determining radial velocity responses on the outer surface of the models. Results indicate that stenosis severities higher than 70% lead to significant increase in response amplitudes, especially at high frequencies between 250 and 600Hz. The findings agree well with experimental and theoretical results in the literature considering bending mode frequencies, amplitude scales, and mainly excited frequency ranges. It is seen that artery vibration is sensitive to the phase behavior of pressure loading but its effect becomes less significant with the presence of surrounding tissue. As the surrounding tissue thickness increases, radial velocity response amplitudes decrease but the effect of changes in tissue elastic modulus is more pronounced. (C) 2017 Acoustical Society of America.

Subject Keywords

Phonoangiography, Steady, Ortic-stenosis, Skeletal-muscle, Sound generation, Computational analysis, Turbulent-flow, Coronary-artery, Finite-element model, Fluid-structure interactions

URI

https://hdl.handle.net/11511/42613

Journal

JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA

DOI

https://doi.org/10.1121/1.5005622

Collections

Department of Mechanical Engineering, Article

Suggestions

OpenMETU
Core

Evaulation of spatial and spatio-temporal regularization approaches in inverse problem of electrocardiography Önal, Murat; Serinağaoğlu Doğrusöz, Yeşim; Department of Electrical and Electronics Engineering (2008) Conventional electrocardiography (ECG) is an essential tool for investigating cardiac disorders such as arrhythmias or myocardial infarction. It consists of interpretation of potentials recorded at the body surface that occur due to the electrical activity of the heart. However, electrical signals originated at the heart suffer from attenuation and smoothing within the thorax, therefore ECG signal measured on the body surface lacks some important details. The goal of forward and inverse ECG problems is to r...
Non-invasive acoustic detection of vascular diseases from skin surface using computational techniques with fluid-structure interaction Salman, Hüseyin Enes; Yazıcıoğlu, Yiğit; Ciğeroğlu, Ender; Department of Mechanical Engineering (2018) Atherosclerosis is a cardiovascular disease in which arterial occlusion adversely affects blood circulation. Because of the narrowing of the artery, the blood flow is disturbed and a recirculating flow occurs at the downstream of the stenosis exit. The dynamic pressure fluctuations on the inner arterial wall cause the blood vessel wall to vibrate and the resulting acoustic energy propagates through the surrounding soft tissue and reaches the skin surface. To understand the problem in more detail, computatio...
Spatio-Temporal Solutions in Inverse Electrocardiography Onal, Murat; Serinağaoğlu Doğrusöz, Yeşim (2008-11-27) Conventional electrocardiography (ECG) is an essential tool for investigating cardiac disorders such as arrhythmias or myocardial infarction. It involves interpretation of potentials recorded at the body surface that occur due to the electrical activity of the heart. Estimation of epicardial potentials from these recorded signals is known as inverse problem of ECG. It is difficult to solve this problem for effective cardiac imaging due to the ill-posed nature and high dimensionality of the problem. There ar...
Investigation of fluid structure interaction in cardiovascular system from diagnostic and pathological perspective Salman, Hüseyin Enes; Yazıcıoğlu, Yiğit; Sert, Cüneyt; Department of Mechanical Engineering (2012) Atherosclerosis is a disease of the cardiovascular system where a stenosis may develop in an artery which is an abnormal narrowing in the blood vessel that adversely affects the blood flow. Due to the constriction of the blood vessel, the flow is disturbed, forming a jet and recirculation downstream of the stenosis. Dynamic pressure fluctuations on the inner wall of the blood vessel leads to the vibration of the vessel structure and acoustic energy is propagated through the surrounding tissue that can be de...
Etiology of senile osteoporosis - A hypothesis Atik, O. Sahap; Uslu, M. Murad; Eksioglu, Fatih; Satana, Tolgay (Ovid Technologies (Wolters Kluwer Health), 2006-02-01) Osteoporosis is a major health problem characterized by compromised bone strength predisposing patients to an increased risk of fracture. It may cause morbidity and mortality in elderly men and women. The etiologic factors that lead to senile osteoporosis still are unclear.

Citation Formats

H. E. Salman and Y. Yazıcıoğlu, “Flow-induced vibration analysis of constricted artery models with surrounding soft tissue,” JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, pp. 1913–1925, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42613.