There is almost no risk. Now the anesthesia is completely guaranteed, and the operation can be completely painless. Postoperative analgesia will not cause obvious pain. It won't be difficult to make a second incision in the chest. Use a special costal cartilage cutter to take out the required costal cartilage through a 2-3 cm long minimally invasive incision. After the incision is carefully stitched, the scar will be small and almost invisible.