Stent types and uses in cardiology
Pro Research Analysisby 
Searched over 200M research papers
Types of Stents in Cardiology: Bare Metal, Drug-Eluting, and Bioresorbable Stents
Cardiology uses several main types of stents to treat coronary artery disease (CAD), which is caused by the narrowing of arteries due to plaque buildup. The earliest stents were bare metal stents (BMS), which are simple metal tubes that help keep arteries open after procedures like angioplasty. However, BMS were limited by a high rate of restenosis, where the artery narrows again due to tissue growth inside the stent Sahu2023Ahadi2023Saraf2019.
To address this, drug-eluting stents (DES) were developed. DES are coated with medications that are slowly released to prevent excessive tissue growth and reduce the risk of restenosis. These stents have become the standard in most coronary interventions because they significantly lower the chances of the artery becoming blocked again compared to BMS Weiss2022Paschoal20256+4 MORE.
More recently, bioresorbable stents, also known as bioabsorbable scaffolds (BRS), have been introduced. These stents are designed to dissolve over time, leaving no permanent implant in the artery. The goal is to restore the natural function of the blood vessel after it has healed. While promising, BRS currently have higher rates of restenosis compared to conventional DES and are not yet widely adopted Sahu2023Lee2018Paschoal2025+2 MORE.
Materials and Design Innovations in Cardiovascular Stents
Stents are made from a variety of materials, including stainless steel, cobalt-chromium, and platinum-chromium alloys. The choice of material affects the stent’s flexibility, strength, and compatibility with the body. Newer stents use advanced polymers for drug coatings, and some use biodegradable materials that gradually dissolve Ahadi2023Garg2013Beshchasna2020.
Design improvements have focused on making stents thinner and more flexible, which helps with easier placement and reduces the risk of complications. Innovations also include different types of drug coatings, such as anti-inflammatory and anti-proliferative drugs, to further reduce the risk of restenosis and thrombosis (blood clots) Weiss20226Garg2013+2 MORE.
Uses of Stents in Cardiology
Stents are primarily used to treat obstructive coronary artery disease by keeping narrowed or blocked arteries open, ensuring proper blood flow to the heart muscle. They are inserted during a procedure called percutaneous coronary intervention (PCI), commonly known as angioplasty. Stents are also used to prevent acute vessel closure and seal dissections (tears) in the artery wall Sahu2023Ahadi2023Lee2018+1 MORE.
Drug-eluting stents are especially important for patients at high risk of restenosis, while bioresorbable stents are being explored for younger patients or those who may benefit from a temporary scaffold Weiss2022Paschoal2025Garg2013+1 MORE.
Challenges and Future Directions in Stent Technology
Despite advances, challenges remain. In-stent thrombosis (clot formation inside the stent) and restenosis are still concerns, especially with certain patient groups or complex lesions. Research is ongoing to develop stents with better biocompatibility, improved drug delivery, and materials that further reduce complications Paschoal2025Garg2013Wessely2010+1 MORE.
Artificial intelligence and new imaging technologies are also being used to optimize stent placement and improve outcomes. The future of stent technology includes more personalized stent selection and the development of next-generation bioresorbable devices Sahu2023Paschoal2025Garg2013+1 MORE.
Conclusion
Stents have revolutionized the treatment of coronary artery disease, evolving from bare metal designs to advanced drug-eluting and bioresorbable options. Each type of stent has specific uses, benefits, and limitations. Ongoing research and technological innovation continue to improve stent safety, effectiveness, and patient outcomes in cardiology Sahu2023Ahadi2023Weiss2022+7 MORE.
Sources and full results
Most relevant research papers on this topic