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Peritoneal puncture visual tube lavage and drainage, also known as therapeutic continuous peritoneal lavage and drainage, is not a new therapeutic method in medicine, but it has been paid attention to again in recent years, and gradually improved. From pure saline lavage to the target lavage solution with antibiotics, trace heparin, chymotrypsin and so on.

2.1 Selection of Indications At present, there is no unified conclusion on indications of lavage and drainage. Data show that this method can be used when there are more pus and fluid accumulation, serious peritonitis, complex abdominal trauma or leakage. The following criteria were adopted for the selection of cases in our hospital: (1) abdominal pus or other digestive fluid > 500ml; Moreover, the abdominal cavity was extensively polluted and seriously polluted, and considering that cleaning or drainage alone could not reach the purpose; (2) There are a lot of food residue and fecal fluid in the abdominal cavity; (3) moderate and severe necrotizing pancreatitis; The liver abscess is more than 300ml and the abscess is thick and difficult to drain. (4) severe intraperitoneal multiple organ damage, rupture, postoperative intestinal fistula, biliary pancreatic fistula suspected; (5) Postoperative patients with colon necrosis, perforation, rupture, etc. Additional data suggest that severe poisoning symptoms and multiple organ failure may also be used, regardless of age.

2.2 Advantages Peritoneum has a great ability to clear water molecules, but it is very slow to clear cell molecules and microorganisms. If a large number of toxins and bacteria are not removed in time, absorption can lead to serious circulatory failure and death. Postoperative antibiotic therapy is also sometimes ineffective. The purpose of peritoneal lavage and drainage is to: (1) effectively dilute toxins, reduce the concentration of bacteria, and facilitate the play of the body’s defense mechanism; (2) The optimal concentration of intraperitoneal antibiotics can be maintained by internal antibiotic therapy; (3) Lavage and drainage can remove foreign bodies that are difficult to absorb in the peritoneum, and destroy the small chamber and small septum quadrant abscess; (4) Peritoneal lavage and drainage have the same effect as peritoneal dialysis for uremia patients, through which most toxins and bacteria can be dialyzed. It can also maintain normal serum biochemistry or correct metabolic disorders by adjusting the ion concentration and osmotic pressure of lavage solution, and contribute to the stability of internal environment.