Application of underdamped Langevin dynamics simulations for the study of diffusion from a drug-eluting stent

TL;DR

This paper demonstrates that underdamped Langevin dynamics simulations can effectively model drug diffusion from a drug-eluting stent, showing minimal delay effects and highlighting their potential for complex diffusion problems.

Contribution

It introduces the use of underdamped Langevin dynamics simulations for modeling drug diffusion in systems with spatially-dependent diffusion coefficients.

Findings

Membrane has negligible delay on drug delivery rate.

Underdamped Langevin dynamics is efficient for complex diffusion modeling.

Potential for applying this method to other diffusion systems.

Abstract

We use a one-dimensional two layer model with a semi-permeable membrane to study the diffusion of a therapeutic drug delivered from a drug-eluting stent (DES). The rate of drug transfer from the stent coating to the arterial wall is calculated by using underdamped Langevin dynamics simulations. Our results reveal that the membrane has virtually no delay effect on the rate of delivery from the DES. The work demonstrates the great potential of underdamped Langevin dynamics simulations as an easy to implement, efficient, method for solving complicated diffusion problems in systems with a spatially-dependent diffusion coefficient.