对 4 2例体重 4 .2～ 14kg,3～ 36个月龄的法乐氏四联症患儿 ,在低温体外循环下行法四根治术。术后使用多巴胺、多巴酚丁胺 2～ 10 μg/(kg.min)。末梢循环欠佳或低心排时用硝普钠 0 .1～ 0 .5μg/(kg.min)。尿量偏少用速尿效果欠佳时加用硝酸甘油。合理搭配胶体液和晶体液的用量 ,控制出入量。结果 :术后出现低心排 5例 ,死亡 3例 ,39例康复出院。认为术前加强营养 ,提高血氧饱和度 ,能提高患儿对手术的耐受力。术后用多巴胺和多巴酚丁胺能改善心功能 ,稳定血压。 Forty-two children with tetralogy of Fallot, weighing 4.2-2.4 kg and 3-36 months of age, underwent four-line surgery under hypothermic cardiopulmonary bypass. Postoperative use of dopamine, dobutamine 2 ~ 10 μg / (kg.min). Poor peripheral circulation or low cardiac output with sodium nitroprusside 0. 1 ~ 0. 5μg / (kg.min). Decreased urine output with furosemide less effective when using nitroglycerin. Reasonable with the amount of colloidal liquid and crystal fluid, control the amount of access. Results: Postoperative low cardiac output in 5 cases, 3 patients died, 39 cases were discharged. That preoperative nutrition, improve blood oxygen saturation, can improve the child’s tolerance to surgery. Postoperative dopamine and dobutamine can improve cardiac function, blood pressure stability.