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首页> 外文期刊>Skeletal radiology >Assessment of ulnar variance: a radiological investigation in a Dutch population.
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Assessment of ulnar variance: a radiological investigation in a Dutch population.

机译：尺骨方差的评估：在荷兰人群中进行的放射学调查。

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OBJECTIVE: A radiological study was performed to evaluate ulnar variance in 68 Dutch patients using an electronic digitizer compared with Palmer's concentric circle method. Using the digitizer method only, the effect of different wrist positions and grip on ulnar variance was then investigated. Finally the distribution of ulnar variance in the selected patients was investigated also using the digitizer method. DESIGN AND PATIENTS: All radiographs were performed with the wrist in a standard zero-rotation position (posteroanterior) and in supination (anteroposterior). Palmer's concentric circle method and an electronic digitizer connected to a personal computer were used to measure ulnar variance. The digitizer consists of a Plexiglas plate with an electronically activated grid beneath it. A radiograph is placed on the plate and a cursor activates a point on the grid. Three plots are marked on the radius and one plot on the most distal part of the ulnar head. The digitizer then determines the difference between a radius passing through the radius plots and the ulnar plot. RESULTS AND CONCLUSIONS: Using the concentric circle method we found an ulna plus predominance, but an ulna minus predominance when using the digitizer method. Overall the ulnar variance distribution for Palmer's method was 41.9% ulna plus, 25.7% neutral and 32.4% ulna minus variance, and for the digitizer method was 40.4% ulna plus, 1.5% neutral and 58.1% ulna minus. The percentage ulnar variance greater than 1 mm on standard radiographs increased from 23% to 58% using the digitizer, with maximum grip, clearly demonstrating the (dynamic) effect of grip on ulnar variance. This almost threefold increase was found to be a significant difference. Significant differences were found between ulnar variance when different wrist positions were compared.
机译：目的：进行了一项放射学研究，通过电子数字化仪与Palmer同心圆法比较了68名荷兰患者的尺骨变化。仅使用数字转换器方法，然后研究了不同腕部位置和握持方式对尺骨变异的影响。最后，还使用数字化仪方法研究了所选患者的尺骨方差分布。设计与患者：所有X光片均在腕部处于标准零旋转位置（前后）和旋后（前后）时进行。 Palmer的同心圆法和连接到个人计算机的电子数字化仪用于测量尺骨方差。该数字转换器由一个有机玻璃板组成，在其下方有一个电子激活的网格。射线照片放在板上，光标激活网格上的一个点。尺骨radius骨上标出了三个图，尺骨最远端标出了一个图。然后，数字化仪确定通过半径图和尺骨图之间的半径之差。结果与结论：使用同心圆法，我们发现尺骨加优势，而使用数字化仪法则发现尺骨加优势。总体而言，Palmer方法的尺骨方差分布为41.9％尺骨加法，25.7％的中性尺骨和32.4％尺骨减法的方差，而对于数字化仪方法，尺骨方差分布为40.4％尺骨加法，1.5％的中性尺骨和58.1％尺骨减法。使用数字化仪，在最大的抓地力下，标准X射线照片上尺骨方差的百分比从23％增加到58％，清楚地表明了抓地力对尺骨方差的（动态）影响。发现几乎三倍的增加是显着的差异。比较不同的手腕位置时，尺骨差异之间存在显着差异。

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