Cardiac stenting is more commonly used in recent years and is one of the preferred options for opening restenotic vessels and for PCI treatment. The patient undergoes the procedure under local anesthesia, either the cerebral or femoral artery is chosen as the entrance, and then a local puncture is performed, first through the peripheral vessels, allowing the catheter to travel forward in the vessel, when the catheter reaches the opening of the coronary artery, a special delivery system is used to deliver the stent to the lesion to be placed, and the original stenosed artery is then observed for normal blood return. If the blood flow returns to normal for use, the stent is placed successfully, at which point the stent can be released, the catheter withdrawn, and the procedure ended, followed by pressure on the puncture site until no further secondary bleeding occurs at the puncture site.