The comparison of clinically relevant doses of intrathecal ropivacaine and levobupivacaine with fentanyl for labor analgesia

摘要

BackgroundIntrathecal labor analgesia using new local anesthetics such as ropivacaine or levobupivacaine becomes more popular by virtues of their safety and decreased motor weakness. However, the analgesic efficacy of the clinically effective intrathecal doses of these new local anesthetics combined with fentanyl has yet to be determined.