METHODS: Models of rabbits I/R injury were made.The effects of astragalius membranaceus on PS, LPO in blood plasma and lung tissue were tested.

• 方法：复制家兔肠损伤模型，测定血浆和肺组织LPO及肺表面活性物质含量变化，同时计算肺系数及进行肺病理学检查，并观察黄芪对LPO及肺表面活性物质含量的影响。