The small mesh tube used to treat narrowed arteries is called a "stent." It is a tiny, expandable wire mesh tube that is placed inside an artery to keep it open and allow improved blood flow. The stent is typically inserted during or after an angioplasty procedure, where a balloon catheter is used to widen the artery. Stents can be bare metal or coated with medication, called drug- eluting stents, which help prevent the artery from narrowing again by releasing drugs that inhibit scar tissue and plaque buildup. Stents are commonly used in coronary arteries to treat coronary artery disease but are also employed in other parts of the body to manage peripheral artery disease. The mesh structure of the stent allows it to expand and embed into the artery walls, providing a scaffold that stabilizes the artery and sustains blood flow.