Comparation of efficacy between combined lumbar plexus-sciatic nerve block and spinal-epidural anesthesia in the knee joint replacement operation

Objective To compare the effect of life sign and the difference of anesthesia efficacy between combined lumbar plexus-sciatic nerve block and spinal-epidural anesthesia in the knee joint replacement operation.Methods 60 patients with knee joint replacement operation were randomly divided into group A and B with 30 cases each.Patients in group A were assigned to receive lumbar plexus block using 0.33% ropivacain 30 ml and sciatic nerve block 0.33% ropivacain 20 ml by peripheral nerve stimulator(PNS),while spinal-epidural anesthesia were performed in patients of group B at L3-4 interspace with 0.5% ropivacain 2ml.The changes of heart rate and blood pressure and the blockade effects of sensory and motornerve were observed.Results The hemodynamics in group A was more stable than that in group B,while there was no significant difference in the working time and the blockade effect between two group,but the rate of side reaction in group A was less than that group B.Conclusion The combined lumbar plexus-sciatic nerve block was a good anesthesia method for patients with knee joint replacement operation,which was a stable hemodynamic responses and fewer complication.