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目的:为设计桡骨髓腔内固定器材提供解剖学基础。方法:成人桡骨30例,按20等份横断,观察髓腔形态,测量前后径和横径。结果:总体形态,桡骨髓腔上端横截面呈圆形或矢状位椭圆形,上端最大处为3/20处,前后径平均9.1mm,横径8.5mm。骨干和下端呈前后扁平状,其横截面近似椭圆形,其最小处为桡骨中份,前后径平均4.4mm,横径5.9mm。最大处为下端17/20或18/20处,前后径平均8.0mm,横径13.3mm。结论:桡骨髓腔中间小,两端大;上端呈圆形或椭圆形,骨干和下端呈扁圆形。其形态特点适合用弹性蛇形髓内针固定器械。
Objective: To provide an anatomical basis for the design of radial medial canal fixtures. Methods: 30 adult radial fractures were transected in 20 equal sections to observe the morphology of the medullary cavity and measure the anteroposterior diameter and transverse diameter. Results: The overall shape of the radial medullary cavity cross-section was round or sagittal oval, the maximum at the top 3/20 Department, anteroposterior diameter of 9.1 mm, diameter 8.5 mm. Backbone and the bottom was flat before and after its cross-section is approximately oval, the smallest at the radius of the middle and back anteroposterior diameter of 4.4mm, diameter 5.9mm. The maximum at the lower end of the 17/20 or 18/20 Department, before and after the average diameter 8.0mm, diameter 13.3mm. Conclusion: The middle of radial medullary cavity is small with large ends, the upper end is round or oval, and the backbone and lower end are oblate. Its morphological characteristics suitable for elastic serpentine intramedullary nail fixation equipment.