应用Westgard方法评价决定图判断Sysmex XE5000全血细胞分析仪性能

目的应用Westgard方法评价决定图判断Sysmex XE5000型全血细胞分析仪系统性能的可接受性。方法以实验室室内质控结果的变异系数(CV%)反应方法的不精密度,以实验室参加卫生部临床检验中心2012年室间质评的偏倚(Bias%)反映方法的不准确度,在Westgard方法评价决定图上绘制操作点,并判断各项目的方法性能的可接受性。结果WBC、RBC、HGB、HCT、MCH、MCV、MCHC和PLT的CV%值分别为:1.89、0.6、0.6、0.79、0.9、0.92、1.3和3.2,偏倚分别为-5.71、-2.55、-1.46、-0.27、2.23、0.46、0.27和-6.97。结论采用Westgard方法评价决定图能方便地评价检测仪器的检测性能,Sysmex XE5000全血细胞分析仪主要检测指标性能优秀。

Application of Westgard method evaluation decision chart(MEDx) for judging method performance of Sysmex XE5000 hematologic analyzer

Objective To evaluate the performance of Sysmex XE5000 hematology analyzer by Westgard method evaluation decision chart(MEDx).Methods The percentage coefficient of variation(CV%) accquired from laboratory internal quality control and bias% from external quality assurance(EQA) were taken as measurement imprecision and inaccuracy respectively for analyzer.Westgard method evaluation decision chart(MEDx) is a graphical tool that provides an easy way to judge a method’s performance.MEDx chart took CV % and bias% as operating point’s x and y-coordinate.Operating points of parameters WBC,RBC,HGB,MCV,MCH,MCHC and PLT in MEDx chart were ploted to judge the performance of hematology analyzer XE5000.Results The CV% of WBC,RBC,HGB,HCT,MCH,MCV,MCHC and PLT were 1.89,0.6,0.6,0.79,0.9,0.92,1.3 and 3.2 respectively,and the bias% of those parameters were-5.71,-2.55,-1.46,-0.27,2.23,0.46,0.27 and-6.97 respectively.All the operating points droped in excellent performance region in MEDx.Conclusions Objective decisions on the performance of methods can be made quickly and easily with the aid of a MEDx,Sysmex XE5000 hematology analyzer possesses excellent performance on WBC,RBC,HGB,HCT,MCV,MCH,MCHC and PLT.