A stent is a tiny tube placed into a hollow structure in your body. This structure can be an artery, a vein, or another structure such as the tube that carries urine (ureter). The stent holds the structure open.
When a stent is placed into the body, the procedure is called stenting. There are different kinds of stents. Most are made of a metal or plastic mesh-like material. However, stent grafts are made of fabric. They are used in larger arteries.
A coronary artery stent is a small, self-expanding, metal mesh tube. It is placed inside a coronary artery after balloon angioplasty. This stent prevents the artery from re-closing.
A drug-eluting stent is coated with a medicine. This medicine helps further prevent the arteries from re-closing. Like other coronary artery stents, it is left permanently in the artery.
Most of the time, stents are used when arteries become narrow or blocked.
Stents are commonly used to treat the following conditions that result from blocked or damaged blood vessels:
Other reasons to use stents include:
Related topics include:
Reviewed By: Deepak Sudheendra, MD, FSIR, RPVI, Assistant Professor of Interventional Radiology & Surgery at the University of Pennsylvania Perelman School of Medicine, with an expertise in Vascular Interventional Radiology & Surgical Critical Care, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.