International Journal of Morphology
versión On-line ISSN 0717-9502
During the anterior approach of the lumbosacral spine is necessary considerate the relationships with the vascular system to prevent injuries. The classic anatomy texts describe the aortic bifurcation to level of fourth lumbar vertebra. The objective of this research was determine this level in Chilean individuals. We studied the aortic bifurcation by axial computed tomography in 74 patients, Chilean, adults, of both sexes, 40 men and 34 women. The mentioned level was related with the lumbar vertebras, dividing its body in third parts. We observed the bifurcation at level of inferior third of L3 in 10 patients (13.5 %); in the superior third of L4 in 17 (23 %); in the middle third of L4 in 8 (10.8 %); in the inferior third of L4 in 26 (35.1 %); in the superior third of L5 in 9 (12.2%) and in the inferior third of L5 in 4 (5.4%). The results shown that in 2/3 of the cases the aortic bifurcation was to L4 level, being less frequent in proximal or distal vertebras. These relationships are important for the anatomical knowledge of the abdominal vascular system of our people.
Palabras clave : Anatomy; Aorta; Aortic ; bifurcation; Lumbar vertebras.