A balloon is then handed over this wire and opened at the site on the blockage to re-create blood move on the limb past the blockage. Sometimes the blockages are very difficult (because of calcium) to help keep open with simply a balloon angioplasty along with a fine steel tube https://sgvasculargrp.com/medical-condition/peripheral-arterial-disease/icon-peripheral-arterial-disease-pad-2-3/