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Stent-Induced Arterial Flow Disturbance: Whole Vessel and Cellular Considerations

[+] Author Affiliations
Levanto G. Schachter, Deborah K. Lieu, Abdul I. Barakat

University of California at Davis, Davis, CA

Paper No. IMECE2002-32584, pp. 287-288; 2 pages
doi:10.1115/IMECE2002-32584
From:
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Advances in Bioengineering
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Bioengineering Division
  • ISBN: 0-7918-3650-9 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME

abstract

Although the use of endovascular stents has significantly reduced the incidence of restenosis following balloon angioplasty, restenosis rates remain unacceptably high (20–35% of all angioplasty procedures [1]). Placement of a stent within an arterial segment locally injures vascular endothelium thereby stimulating thrombotic responses that contribute to the development of in-stent restenosis. Recent research suggests that the local fluid mechanical environment in the vicinity of a stent impacts the rate of vessel re-endothelialization following stent-induced injury [2]. This is supported by in vitro data demonstrating that endothelial repair after injury is sensitive to fluid mechanical forces [3]. Recent in vivo data suggest that in-stent restenosis preferentially develops in arterial regions exposed to low and/or oscillatory shear stress [1]. Therefore, it is essential to establish the detailed flow environment in the vicinity of a stent and to investigate the impact of this environment on EC function.

Copyright © 2002 by ASME

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