范婵 刘艳婷 赵印

摘 要：目的 探讨总蛋白双缩脲法单试剂盒与双试剂盒检测结果的一致性。方法 参照美国临床和实验室标准协会（CLSI）EP9-A2文件的要求，以双试剂盒为参比方法、单试剂盒为待评方法，使用患者新鲜血浆标本进行方法比对及偏倚评估。结果 回归方程Y=1.0064X+0.2168，相關系数r=0.9984，不同医学决定水平处的偏倚均小于我国卫生行业标准《WS/T 403-2012 临床生物化学检验常规项目分析质量指标》所规定的总允许误差的1/2。结论 总蛋白双缩脲法单试剂盒与双试剂盒的检测结果具有良好的一致性，差异临床可接受，其检测报告可使用相同的参考区间，但仍建议临床实验室使用双试剂盒检测患者样本。

关键词：总蛋白；双缩脲法；偏倚评估；一致性

中图分类号：R446.1 文献标识码：A DOI：10.3969/j.issn.1006-1959.2018.20.047

文章编号：1006-1959（2018）20-0152-03

Abstract：Objective To investigate the consistency of the results of the total protein biuret method single kit and double kit.Methods According to the requirements of the American Society for Clinical and Laboratory Standards（CLSI）EP9-A2 document，the double kit were used as the reference method，the single kit was used as the method to be evaluated，and the patient's fresh plasma samples were used for method comparison and bias evaluation.Results The regression equation Y=1.0064X+0.2168，the correlation coefficient r=0.9984，the bias at different medical decision levels is less than the total specified in China's health industry standard “WS/T 403-2012 Clinical Biochemical Inspection Conventional Project Analysis Quality Index”.Allow 1/2 of the error.Conclusion The results of single kit and double kit of total protein biuret method were in good agreement with each other，the difference was acceptable in clinic.The same reference range could be used for the test report，but it was still recommended that the clinical laboratory should use double kit to detect the patient sample.

Key words：Total protein；Biuret method；Bias assessment；Consistency

总蛋白（total protein，TP）是血清或血浆所含各种蛋白质的总称，临床上常通过双缩脲法（biuret method）检测血清或血浆TP含量及其组分，用以评价患者的营养状态、消化功能及肝脏合成功能等。相关文献表明，该方法对肝脏疾病、肾脏疾病、出血性疾病和免疫性疾病等的诊疗和愈后判断具有重要价值[1-3]。随着技术的不断发展，试剂盒的性能水平不断提高，部分厂家在TP测定单试剂盒的方法基础上开发了双试剂盒，以减小标本质量对检测结果的干扰，保障检测结果的准确性。本文参照美国临床和实验室标准协会（CLSI）颁布的EP9-A2文件[4]要求，使用患者新鲜血浆标本对单试剂盒和双试剂盒进行方法比对和偏倚，探讨了两试剂盒检测结果的一致性，现报道如下。……