Numerical Study on Eccentric and Concentric Vascular Grafts Prototypes

Shah  Mohammed  Abdul  Khader; Goutam  Thakur; Raghuvir  Pai; Soujata Borbaruah; Keshava Ragavendra

Authors

Shah Mohammed Abdul Khader Department of Mechanical Engineering, School of Science and Engineering, Manipal International University, Malaysia, 71800, Nilai, Negeri Sembilan, Malaysia
Goutam Thakur Department of Biomedical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
Raghuvir Pai Department of Biomedical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
Soujata Borbaruah Department of Biomedical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
Keshava Ragavendra Department of Biomedical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India

Keywords:

Coronary artery, Vascular Grafts, Wall Shear Stres, Carotid Artery Bifurcation

Abstract

The recent advances in computational fluid dynamics (CFD) can be useful in observing the detailed haemodynamics in Coronary bypass grafts for clinical evaluation and treatment. The present study focuses on analysing the effects of anastomotic angle in a small diameter vascular graft. The idea is to focus on the successful determinants of coronary artery bypass surgery such as fluid flow geometry and flow distribution in the neighbourhood area of anastomosis. An attempt has been made to simulate CABG using CFD. 3D concentric and eccentric stenosed coronary bypass graft models are generated in CATIA V5 R 19 and transient analysis was carried out in ANSYS CFX 14.5. Different graft angles such as 30°, 45°, 60°, 75° has been investigated to determine the optimum angle considering the change in haemodynamics. The obtained simulation results provided basic understanding of flow behavior in eccentric and concentric stenosed models for various graft angles. It also provided useful information on influence of angle on the flow behaviour and chose the optimum angle for graft placement.