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2015 | OriginalPaper | Buchkapitel

On the Role of Phase Change in Modelling Drug-Eluting Stents

verfasst von : Franz Bozsak, Jean-Marc Chomaz, Abdul I. Barakat, Giuseppe Pontrelli

Erschienen in: Biomedical Technology

Verlag: Springer International Publishing

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Abstract

A model of drug release from an eluting stent to the arterial wall is presented. The coating layer is described as a porous reservoir where the drug is initially loaded in a polymer-encapsulated solid phase, and is then released both to the coating and to the tissue of the arterial wall in a free phase. The wall is treated as a heterogeneous porous medium and the drug transfer through it is modeled by a non-homogeneous set of coupled partial differential equations that describe a convection-diffusion-reaction process. Change of phases due to drug dissolution in the coating and binding-unbinding reactions in the arterial wall are addressed. Numerical results show a strong coupling of the release kinetics in the polymer and the drug dynamics in the wall, and this coupling depends on the physico-chemical drug properties, the microstructure of the polymeric stent coating and the properties of the arterial wall.

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Metadaten
Titel
On the Role of Phase Change in Modelling Drug-Eluting Stents
verfasst von
Franz Bozsak
Jean-Marc Chomaz
Abdul I. Barakat
Giuseppe Pontrelli
Copyright-Jahr
2015
DOI
https://doi.org/10.1007/978-3-319-10981-7_5

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