Abstract:

BACKGROUND: Pedicle screw technology has been widely used in a variety of spinal surgeries, and it generally uses the classic back midline surgical approach. But in recent years, studies have found that some complications will be caused by this surgical approach.
OBJECTIVE: To provide the anatomical basis for minimally invasive spinal surgery under the localization method through spinal process peak.
METHODS: Five formalin-fixed normal human thoracolumbar specimens were selected, and the rear structure of thoracolumbar spine was anatomize layer by layer under anatomical microscope magnified for 10 times, especially the origin, branch and distribution of the branch and posterior ramus of spinal nerves and the dorsal branches of the segmental artery and vein.
RESULTS AND CONCLUSION: The segmental arteries were mainly divided into the intercostals artery, anterior branch and posterior branch. The posterior branch emerged from the intervertebral foramen posterior to the superior articular process of the vertebral below and divided into their terminal medial and lateral branches. The dorsal branches of the segmental veins paralleled with their corresponding arteries. When the minimally invasive pedical screw internal fixation would be performed, the safe range of the enter point was about 5 mm, and inserting the connective bar through the inner side of the enter point is safest. The percutaneous pedical screw under the location method of spine process peak is approximately in the vertical operation without lateral traction; inserting the connective bar from inner side will reduce the chances of posterior branch and blood vessel damage, which is an important technology for minimally invasive spine surgery.