The choice of abdominal puncture is mainly related to the etiology, for example, the puncture of an abscess in the abdominal cavity needs to be performed as close as possible to the abscess growth site, such as a liver abscess or a splenic abscess, as close as possible to the anatomical location of the liver and spleen, with ultrasound guidance for puncture and drainage. Commonly, puncture examinations for intra-abdominal ascites or effusion are performed mostly in the right lower abdomen or left lower abdomen, in the location above the pubic symphysis, where there are few organ structures, mainly the intestinal canal, which has some ability to avoid injury. Preoperatively, the area is normally disinfected and sheeted, then the cutaneous nerve is blocked with local anesthetic, and a long needle is applied to insert the abdominal cavity in a 45° approach, and then backdrafted to extract the fluid from the abdominal cavity. If low drainage is required, the needle is then removed and the needle is left in the abdominal cavity, while a special laparotomy instrument is used to enter the abdominal cavity with a guide wire, and then a guide wire is used to bring the drainage tube into the abdominal cavity, and then the guide wire and needle are removed and the drainage tube is left in the abdominal cavity. At the same time, the drainage tube was buried in the skin and fixed in order to do long-term drainage.