This article is about randomized prospective clinical studying of the infected rate of the postoperative wound for 200 cases of acute appendicitis. The results are as follows: in 100 cases of locolly using the drugs

after injecting antibiotic solution with the catheter into the subcutaneous space and making closed suction

the rate of the postoperative wound infectionis 4%; in 100 cases of the group of generally using the drugs the rate of the postoperative vound infection is 31%. This shows that by using this method the rate of the postoperative wound infection can be obviously lowered and it has the advantages of economicing antibiotics

shortening the time when the patient is in the hospital and saving the expense. It is a reasonable

economic and effective method of locally using the drugs