A stent is a tube made of fabric and metal mesh that is inserted into the aorta through a small incision in the event of an aortic aneurysm. An aneurysm occurs when arterial walls weaken and bulge. When a bulging aneurysm bursts, it can be fatal. There are several treatment methods available. In some cases, the surgeon may choose to take a wait and watch approach while in other cases, open surgery is required. Often, surgeons choose to use stents. The insertion of a stent is minimally invasive and once inserted into the bulging vein, directs blood flow away from the bulging walls.