Abstract:Objective To explore the effect of ultrasound-guided fascia iliac nerve block combined with general anesthesia in operation for children with congenital dislocation of the hip. Methods A total of 60 children with congenital dislocation of the hip were selected and randomly divided into general anesthesia group（n=30） and fascia iliac nerve block combined anesthesia group (combined anesthesia group,n=30). The heart rate (HR) and mean arterial pressure (MAP) at different time points, operation time, staying time in recovery room and time of tracheal extubation, dosages of fentanyl and propofol, the analgesic effect and the occurrence of complications were compared between two groups. Results In general anesthesia group, HR and MAP at the time of adductor cut (T1), upper femoral rotation osteotomy (T2) and acetabular osteotomy (T3) were significantly higher than those after general anesthesia induction (T0) （P＜0.05）. In combined anesthesia group, HR and MAP at T3 were significantly higher than those at T0 （P＜0.05）. HR and MAP in combined anesthesia group were significantly lower than those in general anesthesia group at T1, T2, and T3 （P＜0.05）. The operation time, staying time in the recovery room, the time of tracheal extubation and the dosages of fentanyl and propofol in combined anesthesia group were significantly lower than those in general anesthesia group (P<0.01). VAS scores of patients in combined anesthesia group at 6-, 12-and 24-h after operation were significantly lower than those in general anesthesia group （P＜0.05）. There was no significant difference in the incidence of complications between two groups (P>0.05). Conclusion In the operation for children with congenital dislocation of the hip, ultrasound-guided iliac fascia nerve block combined with general anesthesia can effectively relieve pain during operation,with stable vital signs, reduce the amount of anesthetics and shorten the postoperative recovery time.