The stent implanted for type 3 aortic coarctation is a large-vessel coated stent, which is a metal stent coated with a special membrane material (PTFE, polyester, polyester, polyurethane, etc.), and is often used to resolve vascular coarctation or perforation. Type 3 aortic coarctation is a relatively mild form of aortic coarctation, but it is still a very dangerous form of large vessel disease that requires prompt treatment once diagnosed. Currently, the main treatment methods are conservative treatment and descending aortic coated stent implantation, when conservative treatment is ineffective or ineffective, stenting can be chosen. Stenting is mainly done by puncturing the femoral artery to enter the guide wire and catheter to find the rupture and then give the stent to seal it. This kind of stent can be put into the blood vessel to tightly fit the blood vessel wall, and after the blood vessel is propped up, the rupture of the blood vessel will be blocked, which can prevent blood from re-entering the blood vessel wall and treat the coarctation of the aorta. This prevents blood from re-entering the vessel wall and treats aortic coarctation. Generally, after sealing, the breach will no longer produce a false lumen.