A balloon is then passed in excess of this wire and opened at the website of the blockage to re-set up blood move to the limb outside of the blockage. From time to time the blockages are extremely difficult (because of calcium) to keep open with simply a balloon angioplasty https://sgvasculargrp.com/medical-condition/peripheral-arterial-disease/icon-peripheral-arterial-disease-pad-2-3/