Key result
Parallel-connector coronary stents show better fluid dynamics than transverse-connector stents via lower shear stress gradients.
Why the study?
Does a coronary stent with parallel-connectors improve fluid dynamic behavior compared to one with transverse-connectors in a computational model?
Does a coronary stent with parallel-connectors improve fluid dynamic behavior compared to one with transverse-connectors in a computational model?
Computational fluid dynamics simulations indicate that coronary stents with parallel connectors offer superior fluid dynamics compared to transverse connectors, which may influence neo-intimal hyperplasia.
Stent connector geometry affects hemodynamics tied to hyperplasia risk; leaves open whether design differences alter clinical restenosis rates.
The aim of the present study is to perform computational fluid dynamics (CFD) simulations of blood flow in two coronary stents in a realistic three-dimensional geometry under physiological conditions. The two stents, similar to real coronary ones, are both made of 12 rings but are different as far as the positions of the struts are concerned. One type of stent has parallel-connectors and the other transverse-ones. Time variation of the parameters correlated to neo-intimal hyperplasia, such as wall shear stress, magnitude of wall shear stress gradient, and oscillatory shear index are investigated with the conclusion that the stent with parallel-connectors has a better fluid dynamic behavior.
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Gori et al. (2011) studied Coronary artery disease. Stent with parallel-connectors (S1) vs. Stent with transverse-connectors (S2) was evaluated on Wall shear stress (WSS), magnitude of wall shear stress gradient (MGS), and oscillatory shear index (OSI). The coronary stent with parallel-connectors demonstrated better fluid dynamic behavior, including lower magnitude of wall shear stress gradient and oscillatory shear index, compared to the transverse-connector stent.
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