Extraction of peritoneal fluid may cause infection, pulmonary edema, edema of abdominal organs and other hazards. 1. Infection: patients who are able to generate peritoneal fluid are often immunocompromised, and the operation does not pay attention to aseptic operation, it is easy to form abdominal infection. This infection is often more serious, need intravenous cefoperazone, levofloxacin and other broad-spectrum, potent antibiotic treatment. 2. Pulmonary edema: generally due to improper extraction of abdominal fluid, extraction speed is too fast, the extraction of too much, resulting in the compression of the thoracic cavity expansion is too fast, which in turn leads to the lungs expanding too quickly, the lungs in the increased permeability of capillaries, resulting in the phenomenon of pulmonary edema. Pulmonary edema usually presents with symptoms such as cough and chest tightness, and can be treated with drugs such as bumetanide injection. 3. Abdominal organ edema: usually due to the extraction of abdominal fluid, resulting in some damage to the abdominal cavity, abdominal pressure drops too quickly, which in turn causes abdominal organ edema. Edema of the abdominal organs usually presents with nausea, vomiting and other symptoms, and can be treated with drugs such as hydrochlorothiazide tablets. Panic, hypoglycemia, and other discomforts may also occur during aspiration of peritoneal fluid. Therefore, you should strictly follow the operation procedures and requirements to avoid the harm caused by various complications.