One of the most common questions that many patients and family members ask before surgery is: If a lobe is removed, will the chest cavity be empty and will the remaining lung wobble around uncomfortably? For most patients, there is no cavity after surgery, and even if there is a cavity in a small percentage of patients, the lung will not wobble around and feel uncomfortable. So, how do you fill the cavity in a lung lobe after removing it? The first is the expansion of the remaining lobe. Remember what we have said several times before, we encourage the patient to cough after surgery, and when he coughs effectively, the remaining lung will expand like a balloon and fill up the remaining chest cavity. After surgery, the mediastinum will be displaced to help reduce the cavity; third, the rib space will be narrowed, after surgery, the space between the ribs will be narrowed, which will make the cavity on this side of the surgery smaller; fourth, the diaphragm will move up, the diaphragm is a thin layer of muscle that separates our thoracic and abdominal cavities, after surgery, the diaphragm will compensate for the upward movement to help occupy the cavity. Through these several mechanisms, the cavity of the lobe of the lung that was taken out is filled. If, after surgery, the remaining lung is not well expanded, in medical terminology, it is poorly compliant and may develop a cavity, but it is usually fixed and does not affect the body too much.