The aesthesia efficiency of 0.75% ropivacaine is litter than 0.5% ropiacaine,but stronger than 0.5% bupivacaine. Three have the good safety.

• 0.；75%25罗哌卡因用于蛛网膜下腔阻滞剖宫产时；其麻醉效能弱于0