Abstract:Objective To evaluate the clinical efficacy of continuous lumbar plexus block on analgesia for elderly patients with total hip arthroplasty (THA). Methods A total of 48 elderly patients undergoing the THA from January 2017 to December 2017 in our hospital were selected, and were randomly assigned to the control group and the study group. The control group was treated with the patient-controlled intravenous analgesia (PCIA), and the study group received the continuous lumbar plexus block. The therapeutic effect, incidence of adverse event, AKS (American Knee Society) scores, VAS (visual analogue scale) scores and range of motion of the hip joint were compared. Results Based on the Harris hip score, the good rate of hip joint function in the study group was higher than that in the control group (P < 0.05), and the incidence of adverse event in the study group was lower than that in the control group (P < 0.05). With repeated measures analysis of variance, we found that the AKS score and VAS score between the study group and the control group were different at 3, 6 and 12 months after operation (P < 0.05). Compared with the control group, the study group had higher AKS scores and lower VAS scores at these time points. There was a difference in the changing trend of AKS score between the study group and the control group (P < 0.05). The range of motion like joint flexion, abduction, adduction, extorsion and intorsion in the study group was better than that in the control group (P < 0.05). Conclusions The continuous lumbar plexus block has a better analgesia effect for elderly patients with THA, and should be further applied in clinical practice.