Key result
In a numerical simulation, the link stent generated time-averaged wall shear stress close to the normal physiological range and improved the hemodynamic environment compared to the grid stent.
Why the study?
Stent implantation is mainstream for arterial stenosis up to 75% with poor medical control, but its effects on hemodynamics considering microcirculation required investigation.
How do different stent designs (grid vs link) affect hemodynamics in a stenotic artery model considering microcirculation?
How do different stent designs (grid vs link) affect hemodynamics in a stenotic artery model considering microcirculation?
Computational modeling suggests that link stent designs may provide a more favorable hemodynamic environment than grid stents when accounting for microcirculation, potentially reducing intimal hyperplasia risk.
Stent models with microcirculation extend hemodynamic analysis; leaves open whether grid or link designs affect clinical outcomes in stenosis.
BackgroundIn recent years, for patients with arterial stenosis up to 75% and poor medical control, stent implantation has become the mainstream choice.ObjectiveThe purpose of this work is to study the effects of stent implantation on hemodynamics in the stenotic artery considering microcirculation.MethodsA stent implantation model with microcirculation is constructed. Expansion simulations are carried out for the grid stent and the link stent respectively to analyze the changes in hemodynamic parameters and the mechanical responses of the plaque and the stent.ResultsCompared with the stent implantation study without microcirculation, the results show that the pressure gradient decreases, and the probability of high time averaged wall shear stress near the stent wires reduces after the grid stent is implanted and expanded. The link stent generates time averaged wall shear stress close to the normal physiological range, and no regions with high oscillatory shear index and high relative residence time are found near the stent wire upstream of the stent.ConclusionsThe link stent can not only better improve the hemodynamic environment, but also reduce the risk of intimal hyperplasia and atherosclerosis. These findings reflect the importance of microcirculation in the regulation of hemodynamics after different stent implantations, providing a new perspective for optimizing stent design.
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He et al. (2026) studied Arterial stenosis. Stent implantation (grid stent and link stent) vs. Stent implantation without microcirculation / grid stent was evaluated on Hemodynamic parameters (pressure gradient, time averaged wall shear stress, oscillatory shear index, relative residence time). In a numerical simulation, the link stent generated time-averaged wall shear stress close to the normal physiological range and improved the hemodynamic environment compared to the grid stent.
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