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Computational Hemodynamic Assessment of a Novel Modular Anastomotic Valve Device for Improving Hemodialysis Vascular Access Patency

[+] Author Affiliations
Andrew McNally, Philippe Sucosky

University of Notre Dame, Notre Dame, IN

A. George Akingba

Indiana University School of Medicine, Indianapolis, IN

Paper No. SBC2013-14560, pp. V01AT12A003; 2 pages
doi:10.1115/SBC2013-14560
From:
  • ASME 2013 Summer Bioengineering Conference
  • Volume 1A: Abdominal Aortic Aneurysms; Active and Reactive Soft Matter; Atherosclerosis; BioFluid Mechanics; Education; Biotransport Phenomena; Bone, Joint and Spine Mechanics; Brain Injury; Cardiac Mechanics; Cardiovascular Devices, Fluids and Imaging; Cartilage and Disc Mechanics; Cell and Tissue Engineering; Cerebral Aneurysms; Computational Biofluid Dynamics; Device Design, Human Dynamics, and Rehabilitation; Drug Delivery and Disease Treatment; Engineered Cellular Environments
  • Sunriver, Oregon, USA, June 26–29, 2013
  • Conference Sponsors: Bioengineering Division
  • ISBN: 978-0-7918-5560-7
  • Copyright © 2013 by ASME

abstract

End-stage renal disease (ESRD) occurs as a result of any renal injury that chronically decreases renal excretory and regulatory function. ESRD patients are most commonly treated with hemodialysis (HD) to manage their renal failure while awaiting kidney transplant. Current practices for maintenance of HD vascular access consist of arteriovenous fistulas (AVFs) or grafts (AVGs), which are both fraught with problems that compromise the patency and use of these surgically created shunts. The major cause of shunt failure is thrombosis caused by occlusion of the outflow venous anastomosis and draining vein. Intimal hyperplasia (IH), which consists of the thickening of the innermost layer of the vessel wall, is the initial pathological event leading to shunt stenosis/thrombosis and has been associated with the presence of flow disturbances and abnormal wall shear stress (WSS) at the graft-vein anastomosis. Therefore, the improvement of HD via the enhancement of vascular access patency requires the development of a novel vascular access technology preserving the normal hemodynamics of the native vein.

Copyright © 2013 by ASME

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