The role of real-time ultrasound guided paramedian epidural space punctures in lumbar anesthesia
旁正中超声实时引导在腰段硬膜外穿刺中的应用

Objective To evaluate the role of real-time ultrasound guidance for paramedian epidural space punctures in lumbar anesthesia in adults.Methods Seventy two patients who underwent lower abdomen surgery under epidural anesthesia were randomized into two groups.The sonography group(Group B,n=36) performed the puncture procedure under real-time sonography guidance which using paramedian scan.The control group(group A,n=36) used classical methods which locates the epidural space by surface landmarks and loss-of-r...