目的：比较骨科下肢手术中3种设定电脑空气止血带压力方法的止血效果。方法将90例患者根据手术日期分成3组，上肢收缩压组患者止血带压力以右上肢收缩压2倍为止血带压力；血氧饱和度组患者止血带压力以当术侧患肢趾端血氧饱和度波形成直线时的充气压力为止血带压力；彩超组患者止血带压力以便携式彩超观察腘动脉血流峰图完全消失时的充气压力为止血带压力；比较3组患者的止血效果。结果上肢收缩压组效果最差，血氧饱和度组次之，彩超组最好，因此采用彩超设定止血带压力效果最好。结论以彩超指导设定空气止血带压力的效果佳，有利于术中止血带压力的个体化设定和护理，值得在临床推广使用。

Objective To compare hemostatic effects of different computerized air tourniquet pressure for patients undergoing operation for lower limb. Methods Ninety patients were divided into different computerized air tourniquets which were applied in three groups