During an angioplasty, your vascular surgeon inflates a small balloon inside a narrowed blood vessel. The balloon helps to widen your blood vessel and improve blood flow The procedure takes two hours or more to complete, this really depends upon how tortuous, or curvy your blood vessels are.Angioplasty and stenting is usually done through a small incision or puncture or sometimes a small incision in your skin, called the access site.A catheter is inserted in the artery in your groin. Using X-ray guidance, your physician then guides the catheter through your blood vessels to the blocked area. The tip of the catheter carries the angioplasty balloon or stent.A dye that can be seen on x-rays (radiopaque dye) is injected, and x-rays are taken so that the narrowed area can be located. After the stent and filter are placed, the catheter is removed. In most angioplasty procedures, a stent is placed in the blocked artery. A stent is a small metal mesh tube that is implanted in the arteries to help keep the blood vessel open. Stents may be coated with drugs that help keep the artery open.