A major consequence of stent implantation is restenosis which occurs due to neointimal formation. There are several factors affecting restenosis among which wall shear stress plays a significant role. The present computational study of developing pulsatile flow through the entrance region of a deployed Palmaz stent in a coronary artery analyzes the local wall shear distribution and its effect on restenosis. A variation from low positive wall shear stress of around 10 dyn/cm2 at the upstream of stent strut intersection to a very high positive wall shear stress of 300 dyn/cm2 at strut intersection and then to a negative wall shear stress of −10 dyn/cm2 at the downstream of strut intersection was observed. Modified oscillatory shear index was calculated which showed persistent recirculation at the downstream of strut intersection indicating it as a highly prone region to restenosis.
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ASME 2004 International Mechanical Engineering Congress and Exposition
November 13–19, 2004
Anaheim, California, USA
Conference Sponsors:
- Bioengineering Division
ISBN:
0-7918-4703-9
PROCEEDINGS PAPER
Evaluation of Modified Oscillatory Shear Index and Recirculation Zone in a Deployed Coronary Stent
Divakar Rajamohan,
Divakar Rajamohan
University of Cincinnati
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Ashraf A. Ibrahim,
Ashraf A. Ibrahim
University of Cincinnati
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Rupak K. Banerjee
Rupak K. Banerjee
University of Cincinnati
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Divakar Rajamohan
University of Cincinnati
Ashraf A. Ibrahim
University of Cincinnati
Lloyd H. Back
Jet Propulsion Laboratory
Milind A. Jog
University of Cincinnati
Rupak K. Banerjee
University of Cincinnati
Paper No:
IMECE2004-61269, pp. 35-36; 2 pages
Published Online:
March 24, 2008
Citation
Rajamohan, D, Ibrahim, AA, Back, LH, Jog, MA, & Banerjee, RK. "Evaluation of Modified Oscillatory Shear Index and Recirculation Zone in a Deployed Coronary Stent." Proceedings of the ASME 2004 International Mechanical Engineering Congress and Exposition. Advances in Bioengineering. Anaheim, California, USA. November 13–19, 2004. pp. 35-36. ASME. https://doi.org/10.1115/IMECE2004-61269
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