Abstract:Objective To compare the postoperative analgesic efficiency of 2 different ultrasound-guided fascia iliaca compartment block (FICB) methods in patients undergoing hip prosthesis surgery. Methods Forty patients undergoing total hip replacement were enrolled in the study, and randomly divided into perpendicular approach group and parallel approach group receiving ultrasound-guided FICB. Both groups were administered with 0.25% Ropivacaine 30 ml at 30 min before surgery. General anesthesia was performed, and intravenous Sulfentanil (2 μg/kg, 100 ml) patient-controlled analgesia (PCA) was performed after surgery. Visual Analog Scale (VAS) scores and PCA times were recorded at 2, 6, 12, 24, 36 and 48 h after block. The adverse events of nausea and vomiting were also recorded. Results The VAS scores in the perpendicular approach group were significantly lower than those in the parallel approach group at 2, 6, 12 and 24 h after operation. The number of times of adding PCA in the perpendicular approach group was smaller than that in the parallel approach group in 6-12 h and 12-24 h after operation (P < 0.05). There were similar adverse effect rates of nausea and vomiting between the two groups (P > 0.05). Conclusions The perpendicular pathway has better analgesic effect in hip prosthesis surgery receiving ultrasound-guided FICB.