Modeling of Microneedle Arrays in Transdermal Drug Delivery Applications

Area of Science:

• Biomedical Engineering
• Computational Science
• Pharmacology

Background:

• Computational tools accelerate medical and engineering technology development.
• Hollow microneedle arrays (MNAs) are explored for drug administration.

Purpose of the Study:

• To evaluate two hollow microneedle array designs for analgesic drug delivery using CFD simulations.
• To model drug behavior within the MNA and its entry into a simulated biological medium.

Main Methods:

• Computational Fluid Dynamics (CFD) simulations were performed in three stages.
• Simulations analyzed lidocaine flow through MNAs and into a porous aqueous medium.
• Key parameters included inlet velocity (0.05 m/s), pressure (2000 Pa), laminar flow, and inlet resistance (400 Pa).

Main Results:

• Vertical flow through MNAs demonstrated superior fluid distribution compared to other designs.
• Favorable infiltration behavior was observed, indicating efficient drug delivery.
• The simulation successfully modeled the interaction between MNA outflow and the biological medium.

Conclusions:

• Hollow microneedle arrays show promise for effective transdermal analgesic delivery.
• CFD simulations are valuable for optimizing MNA design and drug administration protocols.
• Vertical flow configurations enhance drug distribution and skin penetration for improved therapeutic outcomes.