In angioplasty and stenting, a vascular surgeon or interventional radiologist inserts a catheter in to the artery and inflates a balloon squashing the plaque into the artery wall. A stent or cage is then put at the location to maintain the artery open and prevent re-narrowing. is based on data https://www.sgvascularctr.com/treating-carotid-artery-disease-an-overview-of-treatment-options-in-singapore/