Angioplasty is a minimally invasive procedure that widens narrowed or block arteries, restoring vital blood flow and improving quality of life. The procedure begins with the insertion of a small flexible tube called a catheter into blood vessels. The catheter allows the doctor to navigate and study the intricate network of arteries and veins from within. A balloon at the tip of the catheter can then be used to open up areas that are blocked in order to restore blood flow. Common applications are in opening up blocked dialysis conduits, central veins or arteries of the legs.