Group L0.125-F: received levobupivacaine 0.125% combined fentanyl 2mcg / ml; group L0.0625-F: received levobupivacaine 0.0625% combined fentanyl 2mcg/ml.
Nhóm L 0,125 - F: levobupivacaine 0,125% phối hợp fentanyl 2 mcg / ml; nhóm L 0,0625 - F: levobupivacaine 0,0625% phối hợp fentanyl 2 mcg / ml.