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arXiv 2401.09644physics.med-ph
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具有结合反应的扩散控制递药系统中药物释放的总分数

Total fraction of drug released from diffusion-controlled delivery systems with binding reactions

Elliot J. Carr

AI总结:

本文针对具有不可逆结合反应的扩散控制递药系统,推导了板状、圆柱和球体几何下整体式与核-壳系统药物释放总分数的解析表达式,为系统参数影响分析提供理论工具。

摘要:

在扩散控制的药物递送中,药物分子有可能与载体材料结合而永远不会被释放。将这一现象纳入主导机制模型的一种常见方法是引入一个不可逆的一级反应项,即药物分子一旦结合就被永久固定。对于仅扩散模型,最初装载到装置中的所有药物都会被释放,而对于反应-扩散模型,最终只有一部分药物被释放。在这篇短文中,我们展示了如何针对几种常见的扩散控制递药系统计算这一分数。针对板状、圆柱或球体几何形状的整体式(monolithic)和核-壳(core-shell)系统,我们推导出了易于计算的药物释放分数解析表达式。所推导的公式为系统参数(例如扩散系数、结合速率、核心半径)对药物释放总分数的影响提供了分析性见解,这可能有助于设计药物递送系统的从业者。

英文摘要:

In diffusion-controlled drug delivery, it is possible for drug molecules to bind to the carrier material and never be released. A common way to incorporate this phenomenon into the governing mechanistic model is to include an irreversible first-order reaction term, where drug molecules become permanently immobilised once bound. For diffusion-only models, all the drug initially loaded into the device is released, while for reaction-diffusion models only a fraction of the drug is ultimately released. In this short paper, we show how to calculate this fraction for several common diffusion-controlled delivery systems. Easy-to-evaluate analytical expressions for the fraction of drug released are developed for monolithic and core-shell systems of slab, cylinder or sphere geometry. The developed formulas provide analytical insight into the effect that system parameters (e.g. diffusivity, binding rate, core radius) have on the total fraction of drug released, which may be helpful for practitioners designing drug delivery systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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