Abstract

Objective To investigate the effects of lumbar plexus block guided by nerve stimulator in patients with knee osteoarthritis. Methods Sixty-eight patients with knee osteoarthritis were enrolled and ran-domized to two groups: lumbar plexus block guided by nerve stimulator (lumbar plexus block group) and in-tra-articular sodium hyaluronate injection (intra-articular injection group), 34 cases in each group. VAS and WOMAC were evaluated before treatment and 1, 4 and 12 weeks and 6 months after the treatment. Results A total of 62 patients (32 cases in lumbar plexus block group, 30 cases in intra-articular injections group) com-pleted the trial. There were no statistical differences in VAS and WOMAC scales before the treatment between the two groups (P>0.05). VAS and WOMAC scales were significantly decreased in lumbar plexus block group than those in intra-articular injection group at 1, 4 and 12 weeks and 6 months follow up respectively (P<0.05). Conclusion Lumbar plexus block guided by nerve stimulator was more effective in alleviating pain and im-proving knee joints' function in patients with osteoarthritis, compared with intra-articular injections of sodium hyaluronate. Key words: Nerve stimulator; Lumbar plexus; Nerve block; Osteoarthritis, knee; Hyaluronic acid

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