They are all open chests in the middle, and the sternum needs to be cut. After operation, the sternum was fixed with medical steel wire, so the steel wire remained in the body and did not need to be taken out. Because bone healing takes three months, patients need to wear a chest strap 1-3 months in order to fix the sternum and prevent the sternum from nonunion in the early stage. In the meantime, patients should try to avoid activities such as chest enlargement.