Result: The important structures from outside to inside using lateral puncture were medium structures of lumbodorsal fascia ( obliquus externus abdominis, obliquus internus abdominis, transversus abdominis, lumbar quadrate muscle), deep lamella of lumbodorsal fascia, greater psoas muscle, intervertebra foramina and vertebral canal. 结果:侧路穿刺路径由浅入深的主要结构有腰背筋膜中层结构(腹外斜肌、腹内斜肌、腹横肌、腰方肌)、腰背筋膜深层、腰大肌、椎间孔和椎管。