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Attention of abdominal puncture visual tube :① Strictly implement the aseptic technical operation procedures to prevent infection. ② Puncture points should be determined according to the situation and needs. In acute abdomen, it is best to select the puncture point at the point of tenderness and muscle tension is most obvious. (3) Do not puncture at the scar site of abdominal surgery or the obvious loop of intestine. During pregnancy, puncture should be 1cm away from the outer edge of the uterus. (4) For diagnostic puncture with a small amount of ascites, the patient should be placed on the intended puncture side for 3-5 minutes before puncture. For abdominal fluid, the abdominal wall skin should be pulled downward and outward before puncture. After the needle is pulled out, the skin needle eye can be staggered with the abdominal muscle needle eye to prevent ascites from spilling along the needle eye. (5) Massive ascites can cause electrolyte disorder and loss of plasma protein, which is generally not allowed except in special circumstances. The initial discharge should not exceed 3000ml(except for ascites reflux equipment). Bleeding ascites should be stopped after specimen collection. Abdominal band should not be too tight, so as not to cause breathing difficulties. ⑦ If there is ascites extravasation at the postoperative puncture, hot cotton glue can be applied, timely replacement of dressing, to prevent wound infection. After the release of a large amount of fluid, the patient should rest in bed for 8 to 12 hours, and closely observe the changes in the condition. ⑨ Patients with adhesive tuberculous peritonitis, ovarian tumor, cysticercosis or aneurysm should be cautious or contraindicated with abdominal puncture.