重庆市三甲医院临床生物化学常规项目正确度与精密度调查

目的调查重庆市三甲医院临床生物化学常规项目正确度及精密度。方法用参考方法为新鲜冰冻血清样品赋值,并发送给重庆市各个三甲医院临床实验室检测,分析和评估正确度通过率及精密度。结果 33家参加实验室肌酐、总蛋白、总胆红素、尿酸、葡萄糖等项目的正确度通过率低于50%;封闭检测系统中尿酸的正确度通过率(33%)小于开放检测系统(非原厂检测系统,79%,P=0.033);开放检测系统中,校准品与试剂品牌一致模式肌酐正确度通过率高于不一致模式(P=0.014);总胆红素和尿素各有1个水平封闭检测系统精密度高于开放检测系统(T-Bil,P=0.043;Urea,P=0.031)。结论重庆市三甲医院临床生物化学常规项目正确度均有待进一步提高;开放检测系统正确度、精密度与封闭系统无明显差距,某些项目性能超过封闭检测系统。

Investigation on the trueness and precision of routine clinical biochemistry tests in the third-grade class-A hospitals of Chongqing City

Abstract: Objective: To investigate the trueness and precision of routine clinical biochemistry tests in the third-grade class-A hospitals of Chongqing city. Methods: The fresh frozen serum samples were assigned the target values with reference methods, and then allocated to the clinical laboratories of the third-grade class-A hospitals in Chongqing city for testing. The trueness and precision were analyzed and evaluated. Results: The pass rates of trueness of creatinine (Cr), total protein (TP), total bilirubin (T-Bil), uric acid (UA) and glucose (Glu) in 33 clinical laboratories were below 50%. The pass rate of trueness of UA (33%) in the closed detection system was lower than that in the opening detection system (79%, P=0.033). In the opening detection system, the pass rate of trueness of Cr in the mode with the same brand of reagents and calibration materials was higher than that with different brands (P=0.014). The precisions of level 1 of T-Bil and Urea in the closed detection system were better than that in the opening detection system (P=0.043 for T-Bil; P=0.031 for Urea). Conclusion: The trueness of clinical biochemistry tests in the third-grade class-A hospitals of Chongqing city needs to be further improved. There is no significant difference in trueness and precision between the opening detection system and the closed detection system, even the performance of some tests in the opening detection system is better than that in the closed detection system.