Drug delivery, development, and technological aspects for peripheral drug eluting stents

Area of Science:

• Biomedical Engineering
• Materials Science
• Pharmacology

Background:

• Drug-eluting stents (DES) are standard for arterial occlusions, especially in peripheral arterial disease (PAD).
• Enhancements include particulate systems, cytostatic agents, and biodegradable polymers.
• Challenges include chronic disease, recurrent restenosis, limited animal study feasibility, and lack of FDA-endorsed in vitro protocols for peripheral DES.

Purpose of the Study:

• To provide a comprehensive review of drug delivery strategies for peripheral DES.
• To discuss coating methodologies, evaluation criteria, and in vitro/preclinical testing.
• To highlight advancements and future opportunities in the field.

Main Methods:

• Literature review of drug delivery strategies, coating techniques, and evaluation parameters for peripheral DES.
• Analysis of in vitro drug release, permeation studies, and preclinical animal models.
• Discussion of stability testing, regulatory considerations, and quality control.

Main Results:

• Peripheral DES performance is enhanced by integrated systems and materials.
• Accelerated in vitro release testing is proposed as a quality control strategy.
• Standardized regulatory guidelines for stability testing are limited.

Conclusions:

• Modified strategies and accelerated in vitro testing are needed for peripheral DES quality control.
• Comprehensive evaluation includes coating uniformity, drug content, biodegradability, and sterility.
• Further research and standardized frameworks are essential for advancing peripheral DES technology.