Bilateral pedicle screw and echelon tight closure spinal cord technique combined with implant fixations for correcting stiff spinal angular kyphosis

doi:10.3969/j.issn.2095-4344.2014.31.013

Abstract

Abstract:

BACKGROUND: The treatment difficulties of thoracolumbar angular kyphosis surgery are: low correction rate, hard to rebuild sagittal plane, easily induce neurological complications, postoperative loss of balance, high incidence of pseudarthrosis and postoperative loss of correction degree.
OBJECTIVE: To explore the safety and efficacy of modified posterior vertebral column resection osteotomy and bilateral pedicle screw combined with echelon tight closure spinal cord technique and implant fixation for severe spinal angular kyphosis.
METHODS: A total of 87 severe spinal angular kyphosis patients, 36 males and 51 females, who were treated in the Department of Orthopedics, the 306 Hospital of Chinese PLA from January 2006 to December 2013, were enrolled in this study. They underwent posterior vertebral column resection, bilateral pedicle screw combined with echelon tight closure spinal cord, and implant fixation. Kyphosis, spinal sagittal imbalance, offset rate towards trunk side, operation time and intraoperative blood loss were observed before and after treatment.
RESULTS AND CONCLUSION: The preoperative average kyphosis was 90.1° (31°-138°). The postoperative average kyphosis was 27.9° (15°-57°). The improvement rate was 76%. The improvement rate of trunk sagittal offset was 76%. Intraoperative blood loss was 800-3 000 mL, and average blood loss was 2 300 mL. The operation time was 5-7 hours, averagely 5.9 hours. Before treatment, two patients affected neurologic symptoms in double lower extremity, and their Frankel classification was grade C and became grade E after treatment. All patients were followed up for 9-57 months. Bony fusion was achieved in all patients. No complications of spinal cord injury appeared, and no orthopedic angle missing occurred. These results indicate that during posterior vertebral column resection for treating severe angular stiffness of the thoracic kyphosis, blood vessels could be maintained greatly. Blood vessel injury-induced ischemic changes in spinal cord and ischemic reperfusion injury could be avoided. To reduce hemorrhage and to keep effective blood volume in patients with low body mass are effective for early recovery after treatment. Bilateral pedicle screw combined with echelon tight closure spinal cord technique greatly protected spinal cord cells against injury. We should pay attention to the protection and loose of nerve root to avoid postoperative nerve root irritation. Sufficient bone fusion ensures kyphosis correction, avoids spine lateral offset, and plays a key role in spinal function and postoperative orthopedic effect.
Subject headings: kyphosis; internal fixators; osteotomy; orthopedic fixation devices

中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程

全文链接：

中国组织工程研究杂志出版内容重点：人工关节；骨植入物；脊柱；骨折；内固定；数字化骨科；组织工程

全文链接：

Key words: kyphosis, internal fixators, osteotomy, orthopedic fixation devices

CLC Number:

R318

Ma Hua-song, Wang Xiao-ping, Tan Rong, Chen Zhi-ming, Lu Ming, Yuan Wei, Xu Qi-ming, Ren Dong-yun, Ma Wei, Li Long, Wu Jia-jian, Zhang Jing, Zheng Rui, Xin Shen. Bilateral pedicle screw and echelon tight closure spinal cord technique combined with implant fixations for correcting stiff spinal angular kyphosis [J]. Chinese Journal of Tissue Engineering Research, 2014, 18(31): 4992-4997.

Figures/Tables 3

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