Infrared-Based Visualization of Wall Shear Stress Distributions

2009 ◽  
pp. 237-246 ◽  
Author(s):  
Ilka Rudolph ◽  
Matthias Reyer ◽  
Wolfgang Nitsche
Keyword(s):  
Shear Stress ◽  
Wall Shear Stress ◽  
Stress Distributions ◽  
Wall Shear

Novel non-dimensional approach to comparison of wall shear stress distributions in coronary arteries of different groups of patients

2009 ◽  
Vol 202 (2) ◽  
pp. 483-490 ◽  
Author(s):  
E. Wellnhofer ◽  
L. Goubergrits ◽  
U. Kertzscher ◽  
K. Affeld ◽  
E. Fleck
Keyword(s):  
Shear Stress ◽  
Wall Shear Stress ◽  
Coronary Arteries ◽  
Stress Distributions ◽  
Dimensional Approach ◽  
Wall Shear

scholarly journals Developing Pulsatile Flow in a Deployed Coronary Stent

2005 ◽  
Vol 128 (3) ◽  
pp. 347-359 ◽  
Author(s):  
Divakar Rajamohan ◽  
Rupak K. Banerjee ◽  
Lloyd H. Back ◽  
Ashraf A. Ibrahim ◽  
Milind A. Jog
Keyword(s):  
Shear Stress ◽  
Wall Shear Stress ◽  
Pulsatile Flow ◽  
Thrombus Formation ◽  
Three Dimensional ◽  
Tissue Growth ◽  
Coronary Stent ◽  
Stress Distributions ◽  
Hemodynamic Parameters ◽  
Wall Shear

A major consequence of stent implantation is restenosis that occurs due to neointimal formation. This patho-physiologic process of tissue growth may not be completely eliminated. Recent evidence suggests that there are several factors such as geometry and size of vessel, and stent design that alter hemodynamic parameters, including local wall shear stress distributions, all of which influence the restenosis process. The present three-dimensional analysis of developing pulsatile flow in a deployed coronary stent quantifies hemodynamic parameters and illustrates the changes in local wall shear stress distributions and their impact on restenosis. The present model evaluates the effect of entrance flow, where the stent is placed at the entrance region of a branched coronary artery. Stent geometry showed a complex three-dimensional variation of wall shear stress distributions within the stented region. Higher order of magnitude of wall shear stress of 530dyn∕cm2 is observed on the surface of cross-link intersections at the entrance of the stent. A low positive wall shear stress of 10dyn∕cm2 and a negative wall shear stress of −10dyn∕cm2 are seen at the immediate upstream and downstream regions of strut intersections, respectively. Modified oscillatory shear index is calculated which showed persistent recirculation at the downstream region of each strut intersection. The portions of the vessel where there is low and negative wall shear stress may represent locations of thrombus formation and platelet accumulation. The present results indicate that the immediate downstream regions of strut intersections are areas highly susceptible to restenosis, whereas a high shear stress at the strut intersection may cause platelet activation and free emboli formation.

Image analysis of oil film interferometry ? a method of measuring wall shear stress distributions

1992 ◽  
Vol 49 (3) ◽  
pp. 261-270 ◽  
Author(s):  
Henri A. Siller ◽  
Richard J. Perkins ◽  
Gerd Janke
Keyword(s):  
Shear Stress ◽  
Image Analysis ◽  
Wall Shear Stress ◽  
Stress Distributions ◽  
Oil Film ◽  
Wall Shear

Wall shear stress distributions on stented patent ductus arteriosus

2017 ◽  
Author(s):  
Mohamad Ikhwan Kori ◽  
Fara Lyana Jamalruhanordin ◽  
Ishkrizat Taib ◽  
Akmal Nizam Mohammed ◽  
Mohammad Kamil Abdullah ◽  
...  
Keyword(s):  
Shear Stress ◽  
Wall Shear Stress ◽  
Patent Ductus Arteriosus ◽  
Ductus Arteriosus ◽  
Stress Distributions ◽  
Wall Shear ◽  
Patent Ductus
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