1. Secondary flow in peripheral vascular prosthetic grafts using vector Doppler imaging.
- Author
-
Kokkalis E, Hoskins PR, Corner GA, Stonebridge PA, Doull AJ, and Houston JG
- Subjects
- Arteries diagnostic imaging, Computer Simulation, Equipment Failure Analysis, Humans, Phantoms, Imaging, Prosthesis Design, Ultrasonography, Doppler instrumentation, Arteries physiology, Arteries surgery, Blood Flow Velocity physiology, Blood Vessel Prosthesis, Image Interpretation, Computer-Assisted methods, Models, Cardiovascular, Ultrasonography, Doppler methods
- Abstract
Prosthetic grafts are used for the treatment of peripheral arterial disease. Re-stenosis in the distal anastomosis of these grafts is a common reason for graft occlusion. The role of local hemodynamics in development of neo-intimal hyperplasia is well known. A new graft design has been proposed for the induction of optimized spiral flow in the host vessel. The secondary flow motions induced by this graft were compared with those of a control device. Both types of grafts were connected with vessel mimic and positioned in ultrasound flow phantoms with identical geometry. Constant flow rates were applied. Data collected in the cross-sectional view distal from the graft outflow and dual-beam vector Doppler was applied to create 2-D velocity maps. A single-spiral flow pattern was found for the flow-modified graft, and double or triple spirals for the control graft. In-plane maximum velocity was greater for the flow-modified graft than for the control device., (Copyright © 2013 World Federation for Ultrasound in Medicine & Biology. Published by Elsevier Inc. All rights reserved.)
- Published
- 2013
- Full Text
- View/download PDF