关键词: 腰椎, 　椎间静脉, 　椎间孔镜, 　安全三角, 　解剖

Abstract: Objective　To study the anatomy and clinical significance of lumbar intervertebral veins.  Methods　12 embalmed cadavers were dissected to observe the tributaries and distribution of the lumbar intervertebral vein, and their relationship with nerve roots in the intervertebral foramina. The diameter and length of branches of the lumbar intervertebral vein were measured by the Vernier caliper (accuracy 0.01 mm). Results    The branches of the intervertebral veins could be observed in all the 120 intervertebral foramina of 12 embalmed cadavers. According to the distribution and distribution of tributaries of the lumbar intervertebral vein, and their relationship with nerve roots can be divided into four types. The average diameter of 199 branches of the lumbar intervertebral veins was （2.13±0.58） mm and the maximum outer diameter was 4.16 mm.     Conclusions    The lumbar intervertebral veins are an important anatomical structure of the lumbar spine. When percutaneous transforaminal endoscopic disscectomy is performed in the safe triangle area, it may lead to the rupture of the intervertebral veins. Attention should be paid to the presence of the intervertebral veins, and early ligation or adequate hemostasis should be performed during operation, which may reduce postoperative complications such as nerve insensitivity. For minimally invasive spine surgeons, understanding of the anatomy of the lumbar intervertebral veins adequately may have some clinical implications.

Key words: Lumbar vertebrae;　The intervertebral veins;　Transforaminal endoscopic;　Safe triangle; ,  ,  Anatomy