The purpose of drinking a laxative before laparoscopic surgery is to expel as much intestinal content as possible and to reduce bloating and gas, as well as to reduce the likelihood of infection. Laxatives are usually started the day before the laparoscopic surgery. The purpose of the laxative is primarily to clear the bowel and reduce bloating. Some patients may experience bloating during the procedure due to some medications, which may interfere with the surgical operation. The enema to reduce bloating can expose the field of vision, so that the field of vision during surgery is clearer, so as to facilitate the operation. At the same time, cleaning the intestines can reduce the probability of infection in laparoscopic surgery. Before laparoscopic surgery generally eight hours can not eat, four hours before the operation can not eat water, at the same time the enema need to drink as much water as possible, in order to prevent the emergence of dehydration symptoms.