Modeling of non‐Fickian diffusion and dissolution from a thin polymeric coating: An application to drug‐eluting stents

Modeling of non‐Fickian diffusion and dissolution from a thin polymeric coating: An application to drug‐eluting stents
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薄聚合物涂层的非菲克扩散和溶解建模:药物洗脱支架的应用

DOI:
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发表时间:
2018
期刊:
影响因子:
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通讯作者:
A. Sequeira
A. Sequeira
中科院分区:
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文献类型:
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作者:
E. Gudiño;C. Oishi;A. Sequeira

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在本文中,我们提出了一个通用模型的非Fickian扩散和药物溶解的控制药物输送装置涂有薄聚合物层。首先,我们研究了稳定性,并推导出一个解析解的问题。然后,我们考虑这种解决方案,并提供合适的边界条件,以取代冠状动脉药物洗脱支架涂层中的质量传输问题。通过这种方法,我们降低了在复杂三维几何形状中执行数值模拟的计算成本。冠状动脉药物洗脱支架的质量传输模型与非牛顿血液模型流耦合。为了证明该方法的有效性,数值实验和模型验证与实验数据也包括在内。特别地,我们研究了非牛顿流态对动脉壁中药物沉积的影响。
In this paper, we present a general model for non‐Fickian diffusion and drug dissolution from a controlled drug delivery device coated with a thin polymeric layer. First, we study the stability and deduce an analytic solution to the problem. Then, we consider this solution and provide suitable boundary conditions to replace the problem of mass transport in the coating of a coronary drug‐eluting stent. With this approach, we reduced the computational cost of performing numerical simulations in complex 3‐dimensional geometries. The model for mass transport by a coronary drug‐eluting stent is coupled with a non‐Newtonian blood model flow. In order to show the effectiveness of the method, numerical experiments and a model validation with experimental data are also included. In particular, we investigate the influence of the non‐Newtonian flow regime on the drug deposition in the arterial wall.
各向异性是否促进动脉组织中支架输送药物分布的空间均匀性?
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