1　术前准备禁食有利于在术中暴露脏器和防止猪发生呕吐。胃和小肠手术需禁食 1 2ｈ ,大肠 (包括螺旋形结肠和直肠 )手术需禁食4 8ｈ ,在禁食期可适当给予葡萄糖、电解质溶液。使用导泻剂可更彻底的清理胃肠道 ,剂量按每 2 5公斤体重 1Ｌ ,由饲水时喂服或灌服。因操作困难 ,尽 1 preoperative preparation of fasting is conducive to exposing organs during surgery and prevent pigs vomiting. Stomach and small bowel surgery need to be fasting 1 2h, large intestine (including spiral colon and rectum) surgery required fasting 48h, during fasting may be given glucose, electrolyte solution. The use of cathartic agents can be more thorough cleaning of the gastrointestinal tract, the dose per 1 kg of body weight 1L, fed by feeding or feeding. Due to operational difficulties, do