New parameters to represent the position of the aorta relative to the spine for pedicle screw placement.

European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society
Katsushi TakeshitaKozo Nakamura

Abstract

Parameters of the position of the aorta in previous reports were determined for anterior surgery. This study evaluated the relative position of the aorta to the spine by new parameters, which could enhance the safety of pedicle screw placement. Three parameters were defined in a new Cartesian coordinate system. We selected an entry point of a left pedicle screw as the origin. The transverse plane was determined to include both the bases of the superior facet and to be parallel to the upper endplate of the vertebral body. A line connecting the entry points of both sides was defined as the X-axis. The angle formed by the Y-axis and a line connecting the origin and the center of the aorta was defined as the left pedicle-aorta angle. The length of a line connecting the origin and the aorta edge was defined as the left pedicle-aorta distance. Distance from the edge of the aorta to the X-axis was defined as the pedicular line-aorta distance. These parameters were measured preoperatively in 293 vertebral bodies of 24 patients with a right thoracic curve. We simulated the placement of the pedicle screw with variable length and with some direction error. We defined a warning pedicle as that when the aorta enters the expected area of the...Continue Reading

References

Aug 1, 1995·The Journal of Bone and Joint Surgery. American Volume·A R VaccaroH S An
Oct 16, 2001·Journal of Neurosurgery·T OhnishiT Nakamura
Mar 12, 2002·The Journal of Bone and Joint Surgery. American Volume·Ulf R LiljenqvistHenry F H Halm
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Citations

Apr 25, 2012·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Jun QiaoYong Qiu
Feb 13, 2016·Journal of Cardiac Surgery·Utkan SevukAylin Erkul
Jan 22, 2011·Spine·Katsushi TakeshitaKozo Nakamura
Feb 26, 2015·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Ling ChenZezhang Zhu
Nov 16, 2018·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·N PlataniotisS Pneumaticos
Feb 26, 2020·Journal of Orthopaedic Surgery and Research·Yan LiangHaiying Liu
Mar 23, 2021·European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society·Rosa M Egea-GámezRafael González-Díaz

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