A venous stent is a small, metal, mesh-like tube that is utilized when there is a blockage due to blood clots or damage to a vessel wall. Prior to a venous stent, an angioplasty is typically attempted. If there is failure of the angioplasty, the venous stent is placed. There are two types of venous stents; balloon-expandable or self-expanding. Some of these stents are bare-metal while others are covered.The appropriate type of stent will be chosen depending on the type of lesion. To insert the venous stent, the balloon placed during the angioplasty is removed and a catheter is inserted with a stent attached to the end. When the stent is placed in the appropriate location, it applies pressure to the walls of the vein to keep it open and allow for better blood flow.