OBJECTIVE  Intervertebral disc extrusion is a common disease affecting chondrodystrophic dogs. It has been reported that fenestration of thoracolumbar intervertebral discs reduces recurrence of disc extrusion and is associated with a low complication rate. One complication reported is iatrogenic introduction of disc material into the canal directly following fenestration. This study aimed to ascertain if, and at what frequency, additional disc material may be introduced into the vertebral canal by fenestration of the affected disc following decompressive surgery. STUDY DESIGN  Twenty-one dogs that underwent hemilaminectomy and disc fenestration for the treatment of thoracolumbar intervertebral disc extrusion had intraoperative assessment of the vertebral canal before and after fenestration. The spinal cord was first decompressed by hemilaminectomy and removal of all visible extruded disc material within the vertebral canal. Once no further material was visible, manual fenestration of the affected disc was performed. The vertebral canal was re-inspected, and the presence or absence of additional material was noted and included in the surgery report. RESULTS  Seven dogs showed the presence of new disc material in the vertebral canal post fenestration.This preliminary study shows that additional disc material can be forced into the vertebral canal by fenestration following decompressive surgery, with a frequency of 7/21. CONCLUSION  This illustrates the importance of checking the vertebral canal after fenestration of an extruded intervertebral disc.

中文翻译：

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通过减压手术后胸腰椎间盘突出术将椎间盘材料引入椎管。

目的椎间盘突出症是影响软骨营养不良犬的常见疾病。据报道，胸腰椎椎间盘开窗术减少了椎间盘挤压术的复发，并且并发症发生率低。报道的一种并发症是在开窗后直接将医嘱将椎间盘材料引入导管。这项研究的目的是确定减压手术后是否通过开窗将受影响的椎间盘开窗将额外的椎间盘材料引入椎管，以及以何种频率引入椎管。研究设计21只接受了半椎板切除术和椎间盘开窗术治疗胸腰椎椎间盘突出症的犬，在开窗前后对椎管进行了术中评估。首先通过半椎板切除术对脊髓减压，并去除椎管内所有可见的椎间盘突出材料。一旦看不到其他材料，就对受影响的椎间盘进行手动开窗。再次检查椎管，并记录是否存在其他物质并将其包括在手术报告中。结果七只狗在开窗后的椎管中发现了新的椎间盘材料，该初步研究表明，减压手术后开窗可将其他椎间盘材料压入椎管，频率为7/21。结论这说明了在挤压椎间盘突出后检查椎管的重要性。一旦看不到其他材料，就对受影响的椎间盘进行手动开窗。再次检查椎管，并记录是否存在其他物质并将其包括在手术报告中。结果七只狗在开窗后的椎管中发现了新的椎间盘材料，该初步研究表明，减压手术后开窗可将其他椎间盘材料压入椎管，频率为7/21。结论这说明在挤压椎间盘开窗后检查椎管的重要性。一旦看不到其他材料，就对受影响的椎间盘进行手动开窗。再次检查椎管，并记录是否存在其他物质并将其包括在手术报告中。结果七只狗在开窗后的椎管中发现了新的椎间盘材料，该初步研究表明，减压手术后开窗可将其他椎间盘材料压入椎管，频率为7/21。结论这说明了在挤压椎间盘突出后检查椎管的重要性。结果七只狗在开窗后的椎管中发现了新的椎间盘材料，该初步研究表明，减压手术后开窗可将其他椎间盘材料压入椎管，频率为7/21。结论这说明了在挤压椎间盘突出后检查椎管的重要性。结果七只狗在开窗后的椎管中发现了新的椎间盘材料，该初步研究表明，减压手术后开窗可将其他椎间盘材料压入椎管，频率为7/21。结论这说明了在挤压椎间盘突出后检查椎管的重要性。