Objective To detect the changes of plasma Lactate level in different periods during CPB in children in normothermia.

目的观察小儿常温体外循环手术中不同时段血浆乳酸水平的变化。

Animals were randomly allocated into 4 groups: sham-operated group, normothermia group, delayed hypothermia group and immediate hypothermia group with 7 rat each.

动物随机分为4组：假手术组、常温组、延迟性低温组和即刻低温组，每组7只。