The Vascular Anatomic Investigation For Artificial Disc Replacement Of Lumbar Spine

[Objectives]This study investigated the anatomical features of bifurcation of aorta, confluent point of common iliac vein, the middle sacral artery and vein and the segmental lumbar artery and vein. The purpose is to improve the safety and the validity of ADR (artificial disc replacement) surgery. [Methods]In our study we dissect the vascular system anterior to lumbar vertebrates of 30 cadavers to learn their spacial characteristics. We choose the indexes to measure as follows :(1) The comparative location of vertebrates and bifurcations of aorta.(2) The comparative location of vertebrates and confluent points of common iliac vein. (3)The initial point of middle sacral artery and confluent point of vein, and their numbers, the company relationship of middle sacral artery and vein. (4)The location, numbers and variance of segmental lumbar arteries and veins. [Results]Most bifurcations distributed at the level of L_4,5 disc. No case was found at or below the level of upper third of L₅ vertebrate. And the distribution decrease when the level goes up. While the confluent point of common iliac vein mostly locate at the level of upper third of the L₅ vertebrate, no case was found to be superior to the level of middle third of L₄ vertebrate. And we...