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Research article
Zhijie Wang
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Background: Three-dimensional CT reconstruction of prone position could measure the relative position between the Great vessels and the thoracolumbar vertebrae. The Great vessels positions of the thoracic and lumbar segments were studied to improve the accuracy of pedicle screw insertion, reduce the risk of vascular injury. Methods: Twenty-four adults participated in the present study. Three-dimensional reconstruction of thoracolumbar (T9–L3) CT was performed in the prone and supine positions. The relative distance between the arteriovenous vessels and vertebrae distance (AVD/VVD) was obtained, respectively. The relative position angle of the arteriovenous vessel and the vertebral body was calculated as ∠AOY/∠VOY. Self-controlled experiments were carried out in the prone and supine positions. The data obtained were analyzed using SPSS 22.0 statistical software. Results: With regard to AVD, The AVD of the T12 was the smallest,> 3.2 mm. The difference among the T9, T10, L2 level was statistically significant (P < 0.05). And AVD was greater in the prone position than in the supine position; while the value of ∠AOY is the descending from T9-L3 gradually, there were statistically significant differences in ∠AOY between T9-T12, L2 and L3 in prone and supine position (P < 0.05). The aorta in the prone position was closer to the midline than that of the supine position, varying from 0°to 30°near the Y axis. With regard to VVD, there was no significant difference in contrast between the prone and supine positions (P≥0.05), and the VVD was the smallest in the L3 level> 5.4 mm. Conclusion: The pre-vertebral position of the aorta may change from T9 to L3 due to changes in body position. When the T9-L3 thoracolumbar spine disease was treated with pedicle screw double cortical fixation, the screw was safe and reliable within a range of≤ 3 mm when broken the pre-cortex .The three-dimensional reconstruction of prone position CT could be used to more accurately assess the relative position of the vertebral body and the blood vessel.
Keywords
Pedicle screw, Bi-cortical insertion, Thoracic and lumbar spine disease, Thoracic and abdominal aorta, Inferior vena cava, Prone CT three-dimensional reconstruction, safety and accuracy.
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View the published article at BMC Musculoskeletal Disorders.
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Editorial decision: Major revision
On 17 Jun, 2020
Review #2 received
Received 22 May, 2020
Review #1 received
Received 15 May, 2020
Reviewer #2 agreed
On 05 May, 2020
Reviewers invited
Invitations sent on 30 Apr, 2020
Reviewer #1 agreed
On 30 Apr, 2020
Editor assigned
On 21 Apr, 2020
Editor invited
On 20 Apr, 2020
Submission checks complete
On 19 Apr, 2020
Version 1
Posted 27 Dec, 2019
No comments provided
Editorial decision: Major revision
On 23 Mar, 2020
Review #3 received
Received 20 Mar, 2020
Review #4 received
Received 17 Mar, 2020
Review #2 received
Received 15 Mar, 2020
Reviewer #4 agreed
On 07 Mar, 2020
Reviewer #2 agreed
On 06 Mar, 2020
Reviewer #3 agreed
On 06 Mar, 2020
Review #1 received
Received 03 Feb, 2020
Reviewers invited
Invitations sent on 21 Jan, 2020
Reviewer #1 agreed
On 21 Jan, 2020
Editor assigned
On 26 Dec, 2019
Submission checks complete
On 24 Dec, 2019
Editor invited
On 24 Dec, 2019
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Subject Areas
Orthopedics
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See the published version of this preprint at BMC Musculoskeletal Disorders.
This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research article
Zhijie Wang
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
View the published article at BMC Musculoskeletal Disorders.
No community comments so far
Editorial decision: Major revision
On 17 Jun, 2020
Review #2 received
Received 22 May, 2020
Review #1 received
Received 15 May, 2020
Reviewer #2 agreed
On 05 May, 2020
Reviewers invited
Invitations sent on 30 Apr, 2020
Reviewer #1 agreed
On 30 Apr, 2020
Editor assigned
On 21 Apr, 2020
Editor invited
On 20 Apr, 2020
Submission checks complete
On 19 Apr, 2020
Version 1
Posted 27 Dec, 2019
No comments provided
Editorial decision: Major revision
On 23 Mar, 2020
Review #3 received
Received 20 Mar, 2020
Review #4 received
Received 17 Mar, 2020
Review #2 received
Received 15 Mar, 2020
Reviewer #4 agreed
On 07 Mar, 2020
Reviewer #2 agreed
On 06 Mar, 2020
Reviewer #3 agreed
On 06 Mar, 2020
Review #1 received
Received 03 Feb, 2020
Reviewers invited
Invitations sent on 21 Jan, 2020
Reviewer #1 agreed
On 21 Jan, 2020
Editor assigned
On 26 Dec, 2019
Submission checks complete
On 24 Dec, 2019
Editor invited
On 24 Dec, 2019
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Orthopedics
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published article at BMC Musculoskeletal Disorders.
Background: Three-dimensional CT reconstruction of prone position could measure the relative position between the Great vessels and the thoracolumbar vertebrae. The Great vessels positions of the thoracic and lumbar segments were studied to improve the accuracy of pedicle screw insertion, reduce the risk of vascular injury. Methods: Twenty-four adults participated in the present study. Three-dimensional reconstruction of thoracolumbar (T9–L3) CT was performed in the prone and supine positions. The relative distance between the arteriovenous vessels and vertebrae distance (AVD/VVD) was obtained, respectively. The relative position angle of the arteriovenous vessel and the vertebral body was calculated as ∠AOY/∠VOY. Self-controlled experiments were carried out in the prone and supine positions. The data obtained were analyzed using SPSS 22.0 statistical software. Results: With regard to AVD, The AVD of the T12 was the smallest,> 3.2 mm. The difference among the T9, T10, L2 level was statistically significant (P < 0.05). And AVD was greater in the prone position than in the supine position; while the value of ∠AOY is the descending from T9-L3 gradually, there were statistically significant differences in ∠AOY between T9-T12, L2 and L3 in prone and supine position (P < 0.05). The aorta in the prone position was closer to the midline than that of the supine position, varying from 0°to 30°near the Y axis. With regard to VVD, there was no significant difference in contrast between the prone and supine positions (P≥0.05), and the VVD was the smallest in the L3 level> 5.4 mm. Conclusion: The pre-vertebral position of the aorta may change from T9 to L3 due to changes in body position. When the T9-L3 thoracolumbar spine disease was treated with pedicle screw double cortical fixation, the screw was safe and reliable within a range of≤ 3 mm when broken the pre-cortex .The three-dimensional reconstruction of prone position CT could be used to more accurately assess the relative position of the vertebral body and the blood vessel.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
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