检验医学 ›› 2015, Vol. 30 ›› Issue (11): 1150-1156.DOI: 10.3969/j.issn.1673-8640.2015.11.021

• 实验室管理·论著 • 上一篇    下一篇

ALT催化活性测定中不同厂家或批号试剂不确定度的评定

顾文超1, 王惠民1, 季伙燕1, 王建新2, 张卫威1, 孟舒婷1, 许丽丽1   

  1. 1.南通大学附属医院检验科,江苏 南通 226001
    2.南通大学检验医学研究所,江苏 南通 226001
  • 收稿日期:2015-01-15 出版日期:2015-11-30 发布日期:2015-12-03
  • 作者简介:null

    作者简介:顾文超,女,1989年生,学士,主要从事酶学及生物化学检验工作。

    通讯作者:王惠民,联系方式:0513-85052102。

  • 基金资助:
    国家质检总局资助项目(201210066)

Estimation on the uncertainty of ALT catalytic activity with different manufacturers or different lot numbers

GU Wenchao1, WANG Huimin1, JI Huoyan1, WANG Jianxin2, ZHANG Weiwei1, MENG Shuting1, XU Lili1   

  1. 1. Department of Clinical Laboratory, the Affiliated Hospital of Nantong University, Jiangsu Nantong 226001, China
    2.The Laboratory Medicine Institute of Nantong University, Jiangsu Nantong 226001, China
  • Received:2015-01-15 Online:2015-11-30 Published:2015-12-03

摘要: 目的

研究不同厂家或同一厂家不同批号的L-丙氨酸、α-酮戊二酸、还原型β-烟酰胺腺嘌呤二核苷酸二钠盐(NADH)和三羟甲基氨基甲烷(Tris)对丙氨酸氨基转移酶(ALT)催化活性浓度的影响,评定ALT催化活性测定中不同厂家或批号试剂不确定度。

方法

按照国际临床化学和检验医学联合会推荐的ALT参考测量程序(37 ℃),分别测定S1~S5共5个浓度水平血清,用Bland-Altman法分析其一致性,并计算不同厂家或批号试剂间的不确定度。

结果

ALT试剂各成分(L-丙氨酸、α-酮戊二酸、NADH、Tris)不同厂家及批号的不确定度分别为0.90%、0.65%、0.58%、0.23%,对ALT催化活性浓度影响的扩展不确定度为2.54%(k=2)。

结论

要使各参考实验室所测定的ALT催化活性浓度结果更具可比性,应规定各使用试剂厂家及批号,并在不确定度评定中考虑不同厂家或批号试剂的不确定度。

关键词: 不确定度, 丙氨酸氨基转移酶, 催化活性, L-丙氨酸, α-酮戊二酸, 还原型β-烟酰胺腺嘌呤二核苷酸二钠盐, 三羟甲基氨基甲烷

Abstract: Objective

To research the influence of L-alanine, alpha-ketoglutaric acid, beta-nicotinamide adenine dinucleotide reduced disodium salt hydrate(NADH) and Tris hydroxyl methyl aminomethane(Tris) coming from different manufacturers or different lot numbers on alanine aminotransferase (ALT) catalytic activity, and to evaluate the uncertainty of ALT catalytic activity with different manufacturers or different lot numbers.

Methods

The sera with 5 concentrations(S1-S5) were measured by the reference method (37 ℃) recommended by the International Federation of Clinical Chemistry and Laboratory Medicine. The consistency was analyzed by Bland-Altman method, and the uncertainties of ALT with different manufacturers or lot numbers were calculated.

Results

The uncertainties of L-alanine, alpha-ketoglutaric acid, NADH and Tris were 0.90%, 0.65%, 0.58% and 0.23%. The expanded uncertainties of different manufacturers or lot numbers of reagents were 2.54%(k=2).

Conclusions

It is supposed to define every reagent manufacturer and lot number to make ALT catalytic activity measured by reference laboratories more comparable. When evaluating the uncertainty, we should consider the influence of reagents with different manufacturers or different lot numbers.

Key words: Uncertainty, Alanine aminotransferase, Catalytic activity, L-alanine, Alpha-ketoglutaric acid, Beta-nicotinamide adenine dinucleotide reduced disodium salt hydrate, Tris hydroxyl methyl aminomethane

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