ED50 and ED95 of intrathecal levobupivacaine with opioids for Caesarean delivery

When combined with intrathecal sufentanil 2.5 µg and intrathecal morphine 100 µg, the ED95 of intrathecal levobupivacaine is 12.9 mg for Caesarean delivery. If doses of levobupivacaine less than the ED95, particularly near the ED50, are used, these doses should be administered under a CSE technique.