Bone-to-Bone Ligament Preserving Laminoplasty with Ultrasonic Osteotome Assistance for Intraspinal Tumors: A Technical Note and Clinical Follow-Up

Objective

Laminectomy has been widely used for intraspinal tumor resection. However, the tilted spinous process and narrow lateral laminae of the thoracic spine along with the hypertrophic ligamentum flavum of the lumbar spine pose certain problems for the laminae removal of the traditional laminectomy. We improved the laminectomy method with ultrasonic osteotome to treat thoracolumbar tumors and assessed its safety and superiority.

Methods

A retrospective analysis was performed in 86 patients with thoracolumbar (T4–L5) spinal tumors treated by resection, including 44 with the lamina removed using the traditional method and 42 with the lamina removed using the bone-to-bone ligament preserving (BLP) laminoplasty, which preserves the posterior ligament complex. Age, sex, and tumor size, location, and depth were compared between the two groups. The length of incision and bone window, time to remove the vertebral lamina, and epidural effusion volume were recorded at 2 weeks after surgery in the two groups. Postoperative reexamination by magnetic resonance imaging (MRI) at 2 weeks and 3 months after surgery was compared with preoperative MRI to assess the change in vertebral lamina displacement.

Results

There were no statistical differences in age, sex, and tumor size, depth, or location between the two groups. The BLP laminectomy did not increase the risk of dural, spinal cord, or nerve injuries. The difference between the incision and tumor length, as well as the difference between the bone window and tumor length in the BLP laminectomy group, were smaller than those in the traditional laminectomy group, and the BLP laminectomy took less time compared to that of the traditional laminectomy (p < 0.05). There was no significant difference in the volume of epidural effusion between the two groups at 2 weeks postoperatively, or in the displacement of the returned vertebral plate observed in sagittal and axial positions. The same was true for the displacement at 3 months postoperatively in the axial position. However, the sagittal displacement in the BLP laminectomy group was smaller than that in the traditional laminectomy group (p < 0.05).

Conclusions

The BLP laminectomy is safe for the resection of thoracolumbar spinal canal tumors. It is less traumatic and faster, with less displacement of the returned lamina, resulting in a stable repair of the spine.     

颈椎椎板成形椎管扩大术结合椎弓根螺钉矫形内固定融合术治疗多节段压迫性颈脊髓病合并退变性颈椎后凸的中长期疗效

【摘要】 目的：观察颈后路椎板成形椎管扩大术结合椎弓根螺钉矫形内固定融合术治疗多节段压迫性颈脊髓病合并退变性颈椎后凸患者的中长期疗效。方法：回顾性分析2008年3月~2019年9月，采用颈后路单开门椎板成形椎管扩大术结合椎弓根螺钉矫形内固定融合术治疗的18例多节段脊髓受压的慢性颈脊髓病合并退变性颈椎后凸患者，其中男11例，女7例，年龄52.3±8.1岁；颈椎后纵韧带骨化症（ossification of posterior longitudinal ligament，OPLL）合并慢性颈脊髓病5例，脊髓型颈椎病13例。减压节段：17例为C3~C7，1例为C3~T1，术中固定融合3.8±1.0个椎体。12例患者出院时（术后2周左右）复查颈椎MRI，11例患者获得随访，随访时间2.1~13.5年（10.5±2.8年）。在术前、出院时颈椎侧位X线片上测量后凸节段Cobb角，在颈椎MRI上测量脊髓前缘角及改良K线，末次随访时在X线片上评估手术固定节段骨性融合及后凸矫形角度丢失情况。术前及末次随访时进行JOA评分及颈痛VAS评分。结果：18例患者术前后凸节段的局部Cobb角为6.6°±6.5°后凸，术后2周为3.8°±8.0°前凸，有显著性差异（P<0.01）； 术前C2~C7颈椎Cobb角为1.3°±9.4°前凸，术后2周为5.8°±7.0°前凸，无显著性差异（P＞0.05）。12例患者颈椎MRI上测量脊髓前缘角术前为11.1°±4.2°后凸，术后2周为1.3°±5.2°后凸，有显著性差异（P<0.01）；C2~C7节段脊髓前缘角术前为6.5°±4.4°后凸，术后2周为1.1°±6.3°前凸，有显著性差异（P<0.01）。7例（39%）患者术后出现C5神经根麻痹，均在术后1~4个月内完全恢复。术后末次随访11例患者颈椎侧位X线片显示手术固定节段均获骨性融合，后凸矫形角度无丢失；颈椎MRI显示脊髓无受压，正中矢状位片显示脊髓前缘角无丢失。11例患者JOA评分术前8.0±2.8分，末次随访时15.6±0.9分，有显著性差异（P<0.01），JOA评分改善率（83±14）%；颈痛VAS评分术前为2.2±3.0分，末次随访时为1.1±1.2分，术前与末次随访时相比无显著性差异（P>0.05）。结论：对于合并有退变性颈椎后凸的多节段受压的慢性压迫性颈脊髓病，采用椎板成形椎管扩大术结合椎弓根螺钉矫形内固定融合术可以获得长期稳定、良好的脊髓功能改善的效果。     

超声骨刀不同切骨方式在颈椎后路单开门椎管扩大成形术中的应用

目的:探讨超声骨刀不同的切骨入点和切骨角度在颈椎后路单开门椎管扩大成形术(cervical expan-sive open-door laminoplasty,CEOL)中应用的对比.方法:收集在我院骨科自2016年1月～2020年6月行CE-OL术256例.根据术中开门侧的切骨方式将所有患者分为超声骨刀片状刀头竖直切...     

Clinical Outcomes of Open-Door Laminoplasty Combined with Bilateral Lateral Mass Screw Fixation for Multi-Level Cervical Spinal Stenosis with Traumatic Cervical Instability and Spinal Cord Injury: A Retrospective Study

Objectives

The prevalence of multi-level cervical spinal stenosis complicated with traumatic cervical instability and spinal cord injury (MCSS-TCISCI) is low, and the optimal surgical approach remains unclear. Open-door laminoplasty combined with bilateral lateral mass screw fixation (ODL-BLMSF) is a relatively new surgical technique; however, its clinical effectiveness in managing MCSS-TCISCI has not been well-established. This study aims to assess the clinical value of ODL-BLMSF against MCSS-TCISCI.

Methods

We retrospectively analyzed 20 cases of MCSS-TCISCI treated with ODL-BLMSF from July 2016 to June 2020. Radiographic alterations of all included patients were measured using plain radiographs, CT scans, and MRI scans. Cervical lordosis was evaluated using C2-C7 Cobb angle and cervical curvature index (CCI) on lateral radiographs, and Pavlov ratio at the C5 level. Neurological functional recovery was assessed using Japanese Orthopaedic Association (JOA) scores and Nurick grade, while neck and axial symptoms were assessed using the neck disability index (NDI) and the visual analog scale (VAS). The paired t-test was utilized for statistical analysis.

Results

All included patients were followed up for an average period of 26.5 months (range: 24–30 months) after ODL-BLMSF. The average Pavlov ratio at the C5 level significantly improved from 0.57 ± 0.1 preoperatively to 1.13 ± 0.1 and 1.12 ± 0.04 at 6 months postoperatively and at the last follow-up (t = 16.347, 16.536, p < 0.001). Importantly, this approach significantly increased the JOA score from 5.0 ± 2.6 before surgery to 11.65 ± 4.3 and 12.1 ± 4.3 at 6 months postoperatively and at the last follow-up (t = 9.6, −9.600, p < 0.001), with an average JOA recovery rate of 59.1%; and the average Nurick disability score decreased from 3.0 ± 1.3 (preoperative) to 1.65 ± 1.22 and 1.5 ± 1.2 (6 months postoperatively and at last follow-up) (t = 5.111, 1.831, p < 0.001). Meanwhile, the NDI score decreased from 30.3 ± 4.3 preoperatively to 13.2 ± 9.2 at 6 months (t = 12.305, p < 0.001), and to 12.45 ± 8.6 at the final follow-up (t = 13.968, p < 0.001), while the VAS score decreased from 4.0 ± 1.5 preoperatively to 1.5 ± 0.7 at 6 months (t = 9.575, p < 0.001), and to 1.15 ± 0.7 at the final follow-up (t = 10.356, p < 0.001).

Conclusion

ODL-BLMSF can effectively dilate the stenotic spinal canal to decompress the spinal cord, maintain good cervical alignment and stability, and improve the recovery of neurological function and neck function. This technique is suitable for treating selected cases of MCSS-TCISCI.     

一期后路手术治疗可复性寰枢椎脱位合并下颈椎椎管狭窄

目的:探讨一期后路寰枢椎固定融合术联合单开门椎管扩大椎板成形术治疗可复性寰枢椎脱位合并下颈椎椎管狭窄的临床疗效.方法:2010年6月?2017年12月,采用一期后路寰枢椎钉棒系统固定融合术联合单开门椎管扩大椎板成形术治疗寰枢椎脱位合并下颈椎椎管狭窄的患者21例.患者均为可复性寰枢椎脱位,下颈椎椎管狭窄原因包括多节段颈椎...