Title :
Vortex measurements in vascular anastomosis models
Author :
Gaupp, Stephan ; Wang, Yuanyuan ; How, Thien V. ; Fish, Peter J.
Author_Institution :
Dept. of Clinical Eng., Liverpool Univ., UK
fDate :
31 Oct-3 Nov 1996
Abstract :
A pulsed Doppler ultrasound technique was used to investigate vortex shedding in models of proximal side-to-end anastomosis in pulsatile flow. Vortices were detected in the graft segment during the deceleration phase of the flow cycle. The vortex amplitude varied with distance into the graft reaching a peak at between 2 and 4 diameters downstream of the anastomosis, depending on the Reynolds number, while the measured vortex shedding frequency remained relatively constant with distance at between 8 and 13 Hz for mean Reynolds numbers of 1009 and 523
Keywords :
Doppler measurement; biomedical measurement; biomedical ultrasonics; blood flow measurement; pulsatile flow; vortices; 8 to 13 Hz; Reynolds number; flow cycle deceleration phase; graft segment; proximal side-to-end anastomosis; pulsed Doppler ultrasound technique; vascular anastomosis models; vortex measurements; vortex shedding; Arteries; Bandwidth; Blood flow; Circuits; Filtering; Frequency; Low pass filters; Pulse measurements; Ultrasonic imaging; Ultrasonic variables measurement;
Conference_Titel :
Engineering in Medicine and Biology Society, 1996. Bridging Disciplines for Biomedicine. Proceedings of the 18th Annual International Conference of the IEEE
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-3811-1
DOI :
10.1109/IEMBS.1996.652840
