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Abdominal puncture visual tube is used to identify the nature, cause and diagnosis of abdominal fluid. Instruct the patient to empty urine, sit in a backrest chair or in a reclined position, wear a belt on the back and a plastic apron and middle sheet on the lower abdomen. Lateral decubitus was used for patients with low abdominal fluid volume. The point of puncture may be the midpoint of the pubic symphysis (the white line should be avoided) or the outer third of the symphysis between the umbilicus and the anterior superior iliac spine (usually on the left). Routine skin disinfection. Sterile gloves, sterile towels, local anesthesia to the parietal peritoneum. Step by step, the needle is inserted into the abdominal wall. After entering the abdominal cavity, a small amount of ascites was extracted with a syringe and placed in a sterile test tube for examination. After the operation, the puncture needle was removed, locally coated with iodine tincture and ethanol, covered with sterile gauze, fixed with tape, and then tied to the abdomen. Clarify the nature of abdominal effusion, find out the cause and assist diagnosis. Appropriate amount of asitoneal fluid was extracted to relieve abdominal pressure, relieve abdominal distension, chest tightness, shortness of breath, dyspnea and other symptoms, reduce venous return resistance, and improve blood circulation. The drug is injected into the peritoneal cavity. Massive injection of air (artificial pumping) increases abdominal pressure, makes the diaphragm rise, indirectly presses both lungs, reduces lung activity cap waste, and promotes alveolar healing. Artificial pneumoperitoneum can be used as a hemostatic measure in the case of massive alveolar hemorrhage. Ascites concentration transfusion was performed. Peritoneal lavage can be used for diagnosis (e.g. abdominal trauma) or treatment (e.g. severe acute pancreatitis). Emptying urine before puncture to avoid bladder injury during puncture. There was no special adverse reaction to abdominal puncture visual tube. The appropriate position should be selected according to the patient’s condition during puncture, such as sitting, semi-sitting, supine and lateral position, and the appropriate puncture point should be selected according to the position. Explain to the patient that excessive discharge of fluid at one time can lead to the disorder of water and salt metabolism, resulting in hepatic coma, and be careful.