Abstract:

BACKGROUND: The diseases of lower thoracic vertebral segment are common, but it’s anatomical structure is complex, and there lacks of the studies on segmental blood vessel.
OBJECTIVE: To analyze the structure of lower thoracic vertebral segment blood vessel with digital three-dimensional reconstruction measurement.
METHODS: We selected 32 cases without thoracolumbar fracture from 2010 to 2011. Intravenous injection of iohexol was performed with high pressure injector, and at 24-30 seconds after injection, CT machine was used for the continuous horizontal scan, then the scanning data were imported to the Mimics software for the three-dimensional reconstruction of lower thoracic vertebral segment blood vessel structure and the measurement of distance of segmental blood vessel. The difference of sides, genders and height was compared, as well as the relationship between them.
RESULTS AND CONCLUTION: The location and distribution of lower segment of thoracic blood vessel werehomeostasis, and with the increasing of spinal segments, the distance was gradually increased; the left and the right blood vessels in the same segment were distributed symmetrically, but the segmental vessels spacing of the male patients was bigger than that of the female patients, and the difference was significant, the segmental vessels spacing was positive correlated with height. It indicates that when we clinically select the lateral anterior point as the placement point for the screw, as well as the nail rods or steel plate, we have to lighten the length of the nail rods and the steel plate in order to avoid the injury with the increasing of the spinal segment. The male patients with higher height should select the longer nail rods and steel plate to avoid the segmental blood vessel reasonably