体位变化影响骨密度重复性因素的探讨  

Factors of body positions influencing reproducibility of BMD meas urments

作　　者：张全[1] 杜茜[1] 张颖[1] 

机构地区：[1]解放军总医院妇产科,北京100853

出　　处：《中国骨质疏松杂志》2003年第2期105-107,187,共4页Chinese Journal of Osteoporosis

摘　　要：目的　探讨在骨密度测量过程中体位变化影响重复性的因素。方法　用DEXA(DPXL)扫描ASP和受试者腰椎 ,以ASP为参照物 ,通过对人体固定体位、移动体位、腰椎序列定位BMD的结果进行分析 ,探讨影响重复性因素。结果　固定体位连续多次扫描结果的重复性较好 ,移动体位结果变异性较大 ,体位远离检测床中轴线对结果影响最大 ;而腰椎序列定位不准确获得的结果偏低 ,不能代表真实的L2 4 结果。结论　培训有素的人员操作可以减少因体位变化引起的误差 ,操作人员相对固定 ,对首次检测结果、近期。Objective To find out the factors of body posi ti ons influencing the reproducible results in BMD measurements Methods Using DEXA (DPX-L) to scan the Aluminum Spine Phantom and patient's lu mb ar spines, the BMD in the lumbar spines of patient body in fixed and moved posit ions were compared with reference values of the Aluminum Spine Phantom Results Consecutive serial scannings in fixed position of body yielded better reproducible results than those with considerable variability in moved p o sitions The greatest variabi-lity was found at body positions far from the ce nte r of the test bed Inaccurate positioning of the lumbar spines yielded much low e r BMD value, not representing the actual L 2-4 BMD Thus, experienced ope rat ors made less varied reproducibilities because positioning of the body is a chie f factor in good reproducibilitiy of BMD measurements Conclusion It is highly important to train scan operators in keeping accurate data on B MD measurements for follow-up studies

关 键 词：体位变化 骨密度 骨质疏松症 OP BMD DEXA 骨组织 

分 类 号：R681[医药卫生—骨科学]