1.What are the methods of pumping pleural fluid? Can it be done on an outpatient basis? The doctor will determine whether to do it, where to do it, what problems may exist, etc. according to the specific situation of the patient. Before determining the procedure, the doctor will explain it clearly to the patient and his or her family and obtain informed consent. Some patients who are in good general condition and have relatively simple conditions may have their chest fluid pumped in an outpatient treatment room. However, if the diagnosis is more difficult, or if the condition is more serious, inpatient consultation and treatment is appropriate. 2.Does it hurt to have a pleural fluid pumped? What complications can occur? Pleural fluid extraction is usually done under local anesthesia, and patients do not feel any definite pain. Complications of pleural aspiration include pneumothorax, failed pleural aspiration, bleeding, subcutaneous emphysema, pain, infection, syncope (rare) and so on. Overall, it is relatively safe. 3.Is it normal to have blood in the pleural fluid after pleural fluid puncture? It is inevitable that there will be a very small amount of bleeding when the pleural fluid is drawn, and the pleural fluid may appear light red. Of course, there is another kind of pleural effusion itself accompanied by bleeding in the chest cavity (called bloody pleural fluid), which is more common in tumor effusion. 4.How much pleural fluid is appropriate to be pumped at one time? It depends on the situation. The first time pleural fluid is pumped to clarify the cause of the disease, usually a few hundred milliliters is sufficient. If the pleural fluid is pumped to relieve the symptoms, generally not more than 1000 ml at a time; of course, for patients with repeated pleural fluid pumping, more can be pumped according to the condition. 5.Which patients is closed chest drainage suitable for? This technique is often used for pleural effusion (including abscess chest) caused by pneumonia; because this kind of effusion may not be treated well by antibacterial drugs alone, closed drainage can draw out the infected effusion as soon as possible and help control the infection. In addition, closed drainage can also be used for the treatment of tumor pleural effusion, which can obtain the effect of symptom relief.