Abstract: ［Abstract］ Objective〖HTSS〗〓To investigate the effect of ultrasoundguided quadratus lumborum block(QLB) on the efficacy postoperative analgesia in parturient woman undergoing caesarean delivery.
〖HTH〗〖WTHZ〗Methods〖HTSS〗〓There were 60 parturient in this study who were underwent full term cesarean section. Parturient woman were randomly divided into two groups:QLB group(Q group, n=30) and control group(C group, n=30).Two groups were treated by combined spinal epidural anesthesia, and all parturient woman were treated with PCIA after operation.After cesarean delivery,bilateral of ultrasoundguided QLB were performed,30 ml of 0.25% ropivacaine was injected in each side in Q group, while QLB was not done in C group. The time of operation, the amount of fluid infusion, the amount of bleeding and the volume of urine were recorded. The scores of resting and exercise VAS were recorded at 2, 4, 8, 12, 24, 36 and 48 h after operation.The time of the first press analgesia pump, the number of successfully doses(D1) and the number of attempts(D2) within 48 h, the amount of sufentanil within 48 h were recorded. D1/D2 was calculated. Postoperative recovery was recorded. The satisfaction of the parturient woman on the analgesic effect and the adverse reaction during the analgesia period were recorded at 48 hr postoperatively.
〖HTH〗〖WTHZ〗Results〖HTSS〗〓The VAS scores of the two groups at each time point were gradually rising and then decreasing, and the Q group was lower than the C group. The differences between intergroup, time point and interaction of intergroup and time point of two groups had the statistically significant. The first exhaust time,the time to eat ordinary food and the time to get out of bed after the operation were significantly lower,while the time of the first press analgesia pump, the value of D1/D2, the degree of satisfaction with analgesia were significantly higher in the Q group than those in C group(P＜005).
〖HTH〗〖WTHZ〗Conclusion〖HTSS〗〓After cesarean section, the effect of ultrasoundguided QLB analgesia is accurate, which can significantly alleviate the postoperative pain, reduce the use of opioids, promote rapid recovery of maternal and improve satisfaction.

Key words: anesthesia and analgesia, cesarean section； patient satisfaction