The care of closed chest drainage is very important to maintain closed chest drainage, the key points of care are: First, keep the drainage tube unobstructed: whenever you need to keep the drainage unobstructed, only then can you maintain the negative pressure in the chest cavity and continuously draw out the gas and liquid from the chest cavity. Second, maintain sterility: must keep the drainage tube, incision and other parts of the sterile, drainage bottle must be lower than the chest cavity 60-100cm, to prevent gas, liquid backflow into the chest cavity, daily replacement of the fluid in the drainage bottle to prevent the cause of chest infection. Third, observation records: observe the color of the drainage fluid, record the drainage flow, observe the fluctuation of the water column, and inform the doctor for treatment if necessary. IV. Necessary cardiac monitoring, blood pressure, respiratory and other vital signs monitoring. V. Monitor vital signs for more than half an hour after extubation, and observe any chest tightness, respiratory distress, etc.