Accuracy and Safety of Lateral Vertebral Notch-Referred Technique Used in Subaxial Cervical Pedicle Screw Placement

Zhimin Pan; Junlong Zhong; Shiming Xie; Limin Yu; Chunyang Wu; Yoon Ha; Keung Nyun Kim; Youshan Zhang; Kai Cao

doi:10.1093/ons/opy233

Accuracy and Safety of Lateral Vertebral Notch-Referred Technique Used in Subaxial Cervical Pedicle Screw Placement

Zhimin Pan, Junlong Zhong, Shiming Xie, Limin Yu, Chunyang Wu, Yoon Ha, Keung Nyun Kim, Youshan Zhang, Kai Cao

Department of Neurosurgery

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

BACKGROUND: Biomechanical studies revealed that pedicle screw instrumentation has a superior stabilizing effect compared with other internal fixations in reconstructing the subaxial cervical spine. However, severe neurovascular risks preclude surgeons from routinely conducting pedicle screw manipulation in cervical spine. OBJECTIVE: To evaluate the accuracy and safety of the lateral vertebral notch (LVN)-referred technique used in subaxial cervical pedicle screw (CPS) placement. METHODS: One hundred thirty-five consecutive retrospective patients with cervical disorders underwent the LVN-referred technique for CPS placements in 3 spine centers. Postoperative pedicle perforations were confirmed by CT scans to assess the technical accuracy. Neurovascular complications derived from CPS misplacements were recorded to evaluate the technical safety. RESULTS: A total of 718 CPSs were inserted into subaxial cervical spine. Postoperative CT scans revealed that the accuracy of CPS placement was superior. Neither vertebral artery injury nor spinal cord injury occurred. One radiculopathy was from a unilateral C6 nerve root compression. A screw-related neurovascular injury rate of 0.7% occurred in this cohort. Additionally, there was no significant difference in the accuracy of CPS placement among 3 surgeons (H = 1.460, P =. 482). The relative standard deviation values revealed that technical reproducibility was acceptable. Furthermore, there was no significant difference between the patients' pedicle transverse angles and inserted CPS transverse angles from C3 to C7 (all P >. 05). CONCLUSION: The LVN is a reliable and consistent anatomic landmark for CPS placement. The accuracy and safety of subaxial CPS placement by using LVN-referred technique are highly acceptable, which may endow this technique to be practicably performed in selected patients.

Original language	English
Article number	opy233
Pages (from-to)	52-60
Number of pages	9
Journal	Operative Neurosurgery
Volume	17
Issue number	1
DOIs	https://doi.org/10.1093/ons/opy233
Publication status	Published - 2019 Jul 1

Bibliographical note

Funding Information:
The present study was financially supported by the grants of China Scholarship Council (2017-3109/201708260068), National Natural Science Foundation of China (81460405), 5511 Innovation-driven Program of Jiangxi Province Department of Science and Technology (20165BCB18017), and Key Program of Jiangxi Province Department of Science and Technology (20152ACB21024). The authors have no personal, financial, or institutional interest in any of the drugs, materials, or devices described in this article.

Publisher Copyright:
Copyright © 2018 by the Congress of Neurological Surgeons.

All Science Journal Classification (ASJC) codes

Surgery
Clinical Neurology

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10.1093/ons/opy233

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@article{c8275208c24f453b8a1ef85c13c74411,

title = "Accuracy and Safety of Lateral Vertebral Notch-Referred Technique Used in Subaxial Cervical Pedicle Screw Placement",

abstract = "BACKGROUND: Biomechanical studies revealed that pedicle screw instrumentation has a superior stabilizing effect compared with other internal fixations in reconstructing the subaxial cervical spine. However, severe neurovascular risks preclude surgeons from routinely conducting pedicle screw manipulation in cervical spine. OBJECTIVE: To evaluate the accuracy and safety of the lateral vertebral notch (LVN)-referred technique used in subaxial cervical pedicle screw (CPS) placement. METHODS: One hundred thirty-five consecutive retrospective patients with cervical disorders underwent the LVN-referred technique for CPS placements in 3 spine centers. Postoperative pedicle perforations were confirmed by CT scans to assess the technical accuracy. Neurovascular complications derived from CPS misplacements were recorded to evaluate the technical safety. RESULTS: A total of 718 CPSs were inserted into subaxial cervical spine. Postoperative CT scans revealed that the accuracy of CPS placement was superior. Neither vertebral artery injury nor spinal cord injury occurred. One radiculopathy was from a unilateral C6 nerve root compression. A screw-related neurovascular injury rate of 0.7% occurred in this cohort. Additionally, there was no significant difference in the accuracy of CPS placement among 3 surgeons (H = 1.460, P =. 482). The relative standard deviation values revealed that technical reproducibility was acceptable. Furthermore, there was no significant difference between the patients' pedicle transverse angles and inserted CPS transverse angles from C3 to C7 (all P >. 05). CONCLUSION: The LVN is a reliable and consistent anatomic landmark for CPS placement. The accuracy and safety of subaxial CPS placement by using LVN-referred technique are highly acceptable, which may endow this technique to be practicably performed in selected patients.",

author = "Zhimin Pan and Junlong Zhong and Shiming Xie and Limin Yu and Chunyang Wu and Yoon Ha and Kim, {Keung Nyun} and Youshan Zhang and Kai Cao",

note = "Funding Information: The present study was financially supported by the grants of China Scholarship Council (2017-3109/201708260068), National Natural Science Foundation of China (81460405), 5511 Innovation-driven Program of Jiangxi Province Department of Science and Technology (20165BCB18017), and Key Program of Jiangxi Province Department of Science and Technology (20152ACB21024). The authors have no personal, financial, or institutional interest in any of the drugs, materials, or devices described in this article. Publisher Copyright: Copyright {\textcopyright} 2018 by the Congress of Neurological Surgeons.",

year = "2019",

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doi = "10.1093/ons/opy233",

language = "English",

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T1 - Accuracy and Safety of Lateral Vertebral Notch-Referred Technique Used in Subaxial Cervical Pedicle Screw Placement

AU - Pan, Zhimin

AU - Zhong, Junlong

AU - Xie, Shiming

AU - Yu, Limin

AU - Wu, Chunyang

AU - Ha, Yoon

AU - Kim, Keung Nyun

AU - Zhang, Youshan

AU - Cao, Kai

N1 - Funding Information: The present study was financially supported by the grants of China Scholarship Council (2017-3109/201708260068), National Natural Science Foundation of China (81460405), 5511 Innovation-driven Program of Jiangxi Province Department of Science and Technology (20165BCB18017), and Key Program of Jiangxi Province Department of Science and Technology (20152ACB21024). The authors have no personal, financial, or institutional interest in any of the drugs, materials, or devices described in this article. Publisher Copyright: Copyright © 2018 by the Congress of Neurological Surgeons.

PY - 2019/7/1

Y1 - 2019/7/1

N2 - BACKGROUND: Biomechanical studies revealed that pedicle screw instrumentation has a superior stabilizing effect compared with other internal fixations in reconstructing the subaxial cervical spine. However, severe neurovascular risks preclude surgeons from routinely conducting pedicle screw manipulation in cervical spine. OBJECTIVE: To evaluate the accuracy and safety of the lateral vertebral notch (LVN)-referred technique used in subaxial cervical pedicle screw (CPS) placement. METHODS: One hundred thirty-five consecutive retrospective patients with cervical disorders underwent the LVN-referred technique for CPS placements in 3 spine centers. Postoperative pedicle perforations were confirmed by CT scans to assess the technical accuracy. Neurovascular complications derived from CPS misplacements were recorded to evaluate the technical safety. RESULTS: A total of 718 CPSs were inserted into subaxial cervical spine. Postoperative CT scans revealed that the accuracy of CPS placement was superior. Neither vertebral artery injury nor spinal cord injury occurred. One radiculopathy was from a unilateral C6 nerve root compression. A screw-related neurovascular injury rate of 0.7% occurred in this cohort. Additionally, there was no significant difference in the accuracy of CPS placement among 3 surgeons (H = 1.460, P =. 482). The relative standard deviation values revealed that technical reproducibility was acceptable. Furthermore, there was no significant difference between the patients' pedicle transverse angles and inserted CPS transverse angles from C3 to C7 (all P >. 05). CONCLUSION: The LVN is a reliable and consistent anatomic landmark for CPS placement. The accuracy and safety of subaxial CPS placement by using LVN-referred technique are highly acceptable, which may endow this technique to be practicably performed in selected patients.

AB - BACKGROUND: Biomechanical studies revealed that pedicle screw instrumentation has a superior stabilizing effect compared with other internal fixations in reconstructing the subaxial cervical spine. However, severe neurovascular risks preclude surgeons from routinely conducting pedicle screw manipulation in cervical spine. OBJECTIVE: To evaluate the accuracy and safety of the lateral vertebral notch (LVN)-referred technique used in subaxial cervical pedicle screw (CPS) placement. METHODS: One hundred thirty-five consecutive retrospective patients with cervical disorders underwent the LVN-referred technique for CPS placements in 3 spine centers. Postoperative pedicle perforations were confirmed by CT scans to assess the technical accuracy. Neurovascular complications derived from CPS misplacements were recorded to evaluate the technical safety. RESULTS: A total of 718 CPSs were inserted into subaxial cervical spine. Postoperative CT scans revealed that the accuracy of CPS placement was superior. Neither vertebral artery injury nor spinal cord injury occurred. One radiculopathy was from a unilateral C6 nerve root compression. A screw-related neurovascular injury rate of 0.7% occurred in this cohort. Additionally, there was no significant difference in the accuracy of CPS placement among 3 surgeons (H = 1.460, P =. 482). The relative standard deviation values revealed that technical reproducibility was acceptable. Furthermore, there was no significant difference between the patients' pedicle transverse angles and inserted CPS transverse angles from C3 to C7 (all P >. 05). CONCLUSION: The LVN is a reliable and consistent anatomic landmark for CPS placement. The accuracy and safety of subaxial CPS placement by using LVN-referred technique are highly acceptable, which may endow this technique to be practicably performed in selected patients.

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Accuracy and Safety of Lateral Vertebral Notch-Referred Technique Used in Subaxial Cervical Pedicle Screw Placement

Abstract

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