Observation on the structures related to the blocking of lumbar plexus

Objective:To provide anatomical basis for the blocking of lumbar plexus and prevention of its complications. Method:The structures of lumbus and lumbar plexus and their neighboring relationships were observed in dissected 70 sides of adult corpses. Result:The depth of puncture:The position of puncture was 3cm lower to the cross point of the line between two iliac crests and dorsal middle line and 4-5cm lateral from the lumbar spinous process,the distance from skin to lumbar plexus were(59.6±0.7)(51.4—72.6) mm on the left side and(59.9±0.6)(53.3—71.4) mm on the right side respectively. Conclusion:This study provide reference data for the depth of puncture needle and anatomical basis for the blocking of lumbar plexus.In the course of puncture,attention should be paid to avoid the accidental injuries to abdominal aorta,lumbar artery,inferior vena cava,vertebral canal and kidney etc.