Title :
Flow field characterization inside an arteriovenous graft-to-vein anastomosis under pulsatile flow conditions
Author :
Arslan, Nurullah ; Loth, Francis ; Bassiouny, Hisham
Author_Institution :
Ind. Eng. Dept., Fatih Univ., Istanbul, Turkey
Abstract :
The purpose of this study was to investigate the relationship between the distribution of turbulence intensity and the localization of stenoses inside the venous anastomosis of arteriovenous (A-V) grafts. Turbulent flow measurements were conducted inside an upscaled end-to-side graft model under pulsatile flow condition. The pulsatile flow waveforms had maximum, minimum and mean Reynolds numbers of 2500, 1200 and 1800, respectively based on the graft diameter. The distribution of the velocity and turbulence intensity was measured at several locations in the plane of the bifurcation of the model. Turbulence intensity was found to be greatest downstream of the anastomosis.
Keywords :
blood flow measurement; blood vessels; pulsatile flow; surgery; turbulence; Reynolds numbers; arterial bypass grafts; arteriovenous graft-to-vein anastomosis; bifurcation; color Doppler ultrasound measurements; flow field characterization; graft diameter; laser Doppler anemometer; localization; pulsatile flow conditions; pulsatile flow waveforms; stenoses; turbulence intensity; turbulent flow measurements; upscaled end-to-side graft model; velocity distribution; venous anastomosis; Arteries; Diseases; Fluid dynamics; Fluid flow measurement; Geometry; Stress; Surgery; Thickness measurement; Veins; Vibration measurement;
Conference_Titel :
Engineering in Medicine and Biology Society, 2001. Proceedings of the 23rd Annual International Conference of the IEEE
Print_ISBN :
0-7803-7211-5
DOI :
10.1109/IEMBS.2001.1018862
