Is Ultrasound-guided or Landmark-guided Intra-articular Lidocaine Injection More Effective for Pain Control in Anterior Shoulder Dislocation Reduction? A Randomized Controlled Trial

超声引导下关节内注射利多卡因与体表标志引导下注射利多卡因，哪种方法在肩关节前脱位复位镇痛方面更有效？一项随机对照试验