Fig. 3From: The Minimum Effective Concentration (MEC95) of different volumes of ropivacaine for ultrasound-guided caudal epidural block: a dose-finding studyThe dose–response curve for the MEC50 and MEC95 of ropivacaine in two groups. The MEC50 and MEC95 was 0.276% (95% CI 0.236 to 0.308%) and 0.362% (95% CI 0.322 to 0.612%) for 20 ml ropivacaine; The MEC50 and MEC95 was 0.241% (95% CI 0.194 to 0.268%) and 0.316% (95% CI 0.282 to 0.542%) for 25 ml ropivacaineBack to article page