Performance evaluation of biodegradable polymer sirolimus and ascorbic acid eluting stent systems.

Area of Science:

• Cardiovascular Medicine
• Biomaterials Science
• Medical Device Engineering

Background:

• Drug-eluting stents (DES) are crucial in treating coronary artery disease.
• Biodegradable polymer stents offer potential advantages over traditional metallic stents.
• Evaluating mechanical properties and clinical safety is essential for new DES technologies.

Purpose of the Study:

• To evaluate the performance of biodegradable polymer sirolimus and ascorbic acid eluting stent systems against four commercially available drug-eluting stents (DES).
• To characterize mechanical properties including dimension, foreshortening, recoil, radial force, and trackability.
• To assess the safety and efficacy of a novel DES through registry experiments.

Main Methods:

• Mechanical testing was performed to evaluate dimensions, foreshortening, recoil, radial force, crossing profile, folding shape, trackability, and dislodgement force.
• A post-marketing clinical study was conducted in real-world settings.
• Registry data from 201 patients with 1-month follow-up were analyzed for safety outcomes.

Main Results:

• D+Storm® DES demonstrated superior performance with 1.3% foreshortening and 3.70% recoil compared to other tested DES.
• The ongoing clinical study of D+Storm® DES enrolled 201 patients, with no major adverse cardiovascular events (MACE) reported after 1-month follow-up.
• Initial findings suggest D+Storm® DES is safe in a clinical setting, with further assessment planned for 300 patients.

Conclusions:

• Objective evaluation and comparison of mechanical responses of four commercially available DES were reported.
• While mechanical features showed minor differences, understanding these can aid in selecting the most suitable stent for specific clinical situations.
• The D+Storm® DES exhibits promising safety and performance, warranting continued clinical evaluation.