检验医学 ›› 2019, Vol. 34 ›› Issue (9): 851-854.DOI: 10.3969/j.issn.1673-8640.2019.09.019

• 实验室管理?论著 • 上一篇    下一篇

能力验证/室间质量评价标本在电化学发光检验程序正确度验证中的应用

郭绪晓, 柏淑美(), 凌欣, 高洁, 李金星   

  1. 山东中医药大学附属医院检验科,山东 济南 250014
  • 收稿日期:2018-09-03 出版日期:2019-09-30 发布日期:2019-09-29
  • 作者简介:null

    作者简介:郭绪晓,男,1977年生,硕士,副主任技师,主要从事临床免疫检测与质量管理工作。

  • 基金资助:
    山东省中医药科技发展计划项目(2015-079)

Application of proficiency testing/external quality assessment samples in trueness verification of electrochemiluminescence procedure

GUO Xuxiao, BAI Shumei(), LING Xin, GAO Jie, LI Jinxing   

  1. Department of Clinical Laboratory,the Affiliated Hospital of Shandong University of Traditional Chinese Medicine,Jinan 250014,Shandong,China
  • Received:2018-09-03 Online:2019-09-30 Published:2019-09-29

摘要:

目的 探讨能力验证(PT)/室间质量评价(EQA)标本在电化学发光项目正确度验证中的应用价值。方法 根据美国临床实验室标准化协会(CLIS)EP15-A3文件正确度验证5×5方案,利用2018年国家卫生健康委PT/EQA计划提供的标本,分别对游离三碘原氨酸(FT3)和雌二醇(E2)等电化学发光项目进行正确度验证,每个样本每天检测1批,每批重复5次,共5 d。采用Grubbs' 法判断离群值,采用单因素方差分析方法计算重复性精密度(SR)、实验室内不精密度(SWL)、总体标准误(SEx)、定值物质标准误(SERM)和总体合成标准误(SEC),再根据自由度(dfC)查T分布界值表得到m值,计算正确度验证区间。总体均值如果在验证区间内,正确度验证通过;如果超出验证区间,则计算偏移,并与实验室规定的目标偏移进行比较。结果 FT3和E2的总体均值均在正确度验证区间内,正确度验证通过。结论 可以采用PT/EQA标本对定值物质进行实验室检测程序的正确度验证。

关键词: 能力验证, 室间质量评价, 正确度验证, 电化学发光检测程序

Abstract:

Objective To investigate the role of proficiency testing(PT)/external quality assessment(EQA) samples in trueness verification of electrochemiluminescence procedure. Methods The trueness of electrochemiluminescence procedure,such as free triiodothyronine(FT3)and estradiol(E2),was verified according to the Clinical and Laboratory Standards Institute(CLIS) EP15-A3 document 5×5 experimental design,using the samples of PT/EQA of the National Center for Clinical Laboratories. The experimental procedure,1 run per day for 5 d and 5 replicates per run,was performed. The outliers were calculated by Grubbs' test,and one way ANOVA test was used to calculate the repeatability variance(SR)of users,the within-laboratory variance (SWL),the overall standard error(SEx ),the standard error of target value(SERM)and the combined standard error(SEC). The m value was obtained from the T distribution table according to the degree of freedom(dfC). Finally,the verification interval was calculated. If the overall mean was within the verification interval,the trueness verification passed,and if out,the bias was calculated and compared with the laboratory-specified target bias. Results The overall mean values of FT3 and E2were within the correctness verification interval,and the trueness was verified. Conclusions The samples from PT/EQA can be used as a reference material for trueness verification of laboratory determination procedure.

Key words: Proficiency testing, External quality assessment, Trueness verification, Electrochemiluminescence procedure

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