微创经皮置入经关节椎弓根螺钉的影像解剖学观察The anatomic and radiographic measurement on the lumbar facets relevant to minimally-invasive percutaneous transfacet pedical screw fixation
毛路;赵杰;杨惠林;
摘要(Abstract):
[目的]探讨经皮腰椎经关节椎弓根螺钉理想的进针点、终点及进针角度,为螺钉准确置入提供解剖学参考。[方法]研究20具L3~S1节段干燥标本及200位21~44岁健康成人体检腰椎正侧位X线片,测量关节突关节的高度、宽度及角度,并在直视下应用Boucher技术进行固定,分析螺钉在矢状面及轴位的角度及进针点与上位椎体解剖标志的关系。进一步确定合适的进针点及终点的放射学参数。[结果]L3~5的上关节突最大宽度分别为11,13,15 mm,L3到S1最大上关节突宽度逐渐增大,S1最大约16 mm。L3到L5/S1的上、下关节突高度几乎相等,约14.5mm。关节突关节的外倾角自L3~S1逐渐增大,分别为18°,27°,35°及44°。进针点在冠状面内外方向应当以棘突与下关节突边缘连线中点为参考,头尾方向应当以固定节段的下终板为参考标准。在轴位X线片上,理想的进针角度应为15°~18°;在矢状位的尾倾角为30°~35°。在前后位X线片上,螺钉应终止于椎弓根的下1/4,侧位X线片上应在椎弓根椎体连接处。[结论]通过测量获得腰椎关节突关节准确的解剖学数值,为经皮置入经关节椎弓根螺钉操作提供了较为可靠的数据支持。
关键词(KeyWords): 经皮;腰椎;经关节椎弓根螺钉;进针点;解剖
基金项目(Foundation): 上海市骨科内置入物重点实验室建设基金(编号:08DZ2230330);; 上海高校创新团队建设基金资助
作者(Author): 毛路;赵杰;杨惠林;
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DOI:
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