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首页> 外文期刊>Injury >Significance of hip rotation on measurement of 'Tip Apex Distance' during fixation of extracapsular proximal femoral fractures.
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Significance of hip rotation on measurement of 'Tip Apex Distance' during fixation of extracapsular proximal femoral fractures.

机译：髋关节旋转对股骨近端骨折固定过程中“尖端顶点距离”的测量意义。

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摘要

The Tip Apex Distance (TAD) is defined as the sum of the distance, in millimetres, from the tip of the lag screw to the apex of the femoral head, as measured on an antero-posterior radiograph and lateral radiograph, after correction has been made for magnification. The relationship between the degree of rotation of the hip joint and its implication on measuring TAD during fixation of a proximal femoral fracture was studied. This relationship has not been previously explored in the English literature. This study involved radiographs of a lag screw placed in a synthetic femur specimen taken in neutral and varying degrees of rotation and adduction/abduction. The lag screw was placed anteriorly in the femoral head. Measurements were taken for each radiograph after correction for magnification. RESULTS: Statistical analysis between measurements showed statistically significant differences (P<0.05) of TAD in AP and lateral (abduction and adduction) views. A graph to show the relationship between hip rotationand TAD was conducted and demonstrates a linear correlation. CONCLUSION: If an anteriorly placed hip screw is not seen to be breaching the articular surface on a view taken in internal rotation, the screw is definitely not in the joint. Beware of a hip screw appearing very close to the joint surface on a view taken in external rotation or abduction as it could be within the joint. The converse may apply to a posteriorly placed screw.
机译：顶尖距离（TAD）定义为校正后，在前后X射线照片和侧面X射线照片上测量的从方头螺钉的尖端到股骨头尖的距离的总和，以毫米为单位。用于放大。研究了股骨近端骨折固定过程中髋关节旋转程度及其对TAD测量的影响。这种关系以前没有在英国文学中探讨过。这项研究涉及放置在合成股骨标本中的方头螺钉的射线照相，该标本以中性和不同程度的旋转以及内收/外展拍摄。将方头螺钉向前放置在股骨头中。放大倍数校正后，对每张射线照片进行测量。结果：两次测量之间的统计分析表明，AP和侧面（外展和内收）视图中TAD的统计差异显着（P <0.05）。进行了显示髋关节旋转与TAD之间关系的图表，并显示出线性相关性。结论：如果从内部旋转的角度看，未发现前部髋部螺钉破坏了关节表面，则螺钉肯定不在关节内。当外旋或外展时，提防髋螺钉出现在关节表面附近，因为它可能在关节内。相反，可能适用于后置螺钉。

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