腰椎椎弓根螺钉双皮质固定的椎前大血管三维重建的解剖学研究

Abstract

Abstract:

Objective　The reconstruction and measurement of the anterior large blood vessels of lumbar vertebral based on CT and 3-D reconstruction for feasibility and safety of bi-cortical pedicle screw fixation. Methods　10 fresh adult specimens with gelatin-lead oxide suspension infusion were scaned using multi-CT in order to observe the vessels for measuring the point between pedicle axis line and anterior vertebral edge. L/RAD (L/RVD) refers to the distance from the junction point between pedicle axis line and anterior vertebral edge to the abdominal aorta (inferior vena cava or iliac vein).　Results　There was statistical difference between both sides of AD of vertebrae (L1~3) and VD of vertebrae (L3~5). The abdominal aorta has a tendency to approach close to the anterior aspect of L1~3 vertebrae (0.38~0.46 cm), but not to L3~5 (0.46~0.16 cm). The inferior vena cava was far away the anterior aspect of vertebrae of L1~4 (1.00~0.11 cm). At L1~4 pedicle planes, abdominal aorta located in the -6°~30° area of the front of vertebrae．At L1~3 pedicle planes，inferior vena cava was located in -15°~57° area and -10°~60° for L4．Iliac artery (inside and outside) of left and right anterior border of L5 located in 4°~10°, -20°~60°, -18°~35°, -50°~70°.　Conclusion　In L1~5, it is quite possible to injure abdominal aorta if the left pedicle screws were over deeply planted. Screws plantation in right L1~3 is easy. When planning the screws in right pedicles of L4 and L5, caution should be taken to avoid injury to iliac artery.

Key words: Great vessels, Three-dimensional reconstruction, Amira software, Bi-cortical pedicle screw fixation

CLC Number:

R687.32
R323

CHEN Li-Bang, CHEN Chun. 3D reconstruction of anterior vertebral blood vessels for bi-cortical lumbar pedicle screws fixation[J]. Chinese Journal Of Clinical Anatomy, 2013, 31(5): 528-531.

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3D reconstruction of anterior vertebral blood vessels for bi-cortical lumbar pedicle screws fixation

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