关于Wards三角区的探讨

Study of bone mineral density in Ward's region

目的研究Wards三角区骨密度值的临床意义。方法采用美国HologicDelphiA双能X线骨密度仪测定385名20～80岁志愿者(男230例,女155例)左股骨骨密度及113例左右股骨骨密度,观察Wards三角区的变化规律及临床特点。结果①有40.4%～55.8%的青年人Wards三角区的具体位置计算机很难确定,Wards三角区大部分与解剖部位不相对应;②由计算机自动定位的Wards三角区小方块位置取样误差比较大;③Wards三角区骨密度值的精确度误差和变异系数百分比最大;④腿的位置旋转过度或旋转不足都能引起骨密度的变化;⑤正常人双腿骨密度值无显著性差异。结论Wards三角区骨密度值不能用于诊断或随访。

Objective To study the clinical significance of bone mineral density （BMD） in Ward＇s region. Methods BMD of left hip in 385 volunteers （230 man and 155 women, aged 20 - 80）, and BMD of Dual-Hip in 113 cases were measured by dual-energy X-ray absorptiometry （ DXA, Hologic Delphi A）. Results Difficulties were encountered in locating the Ward＇s triangle by DEXA in 40.4% - 55.8% of the healthy young men due to the non-correspondence with the anatomy. Significant sampling error was found in automatic locating the Ward＇s area by the computer. Precision error and coefficient of variation（ CV）of Ward＇s area was the poorest among all the sites. The proximal femoral BMD value would change with the over or insufficient rotation of the legs. In general, No significant difference was found in BMD in the regions of the proximal femurs between the right and left legs of normal individuals. Conclusions The BMD of Ward＇s region can not be used for diagnosis or follow-up.