检验医学 ›› 2014, Vol. 29 ›› Issue (2): 143-147.DOI: 10.3969/j.issn.1673-8640.2014.02.013

• 技术研究与评价·论著 • 上一篇    下一篇

血清游离脂肪酸酶法测定的方法学评价及生物学变异研究

鹿刚, 高社军, 巨英博   

  1. 河北医科大学第四医院检验科, 河北 石家庄 050011
  • 收稿日期:2013-07-10 出版日期:2014-02-20 发布日期:2014-02-20
  • 作者简介:鹿 刚, 男, 1981年生, 硕士, 主管技师, 主要从事临床生化检验和血脂类项目的研究。
  • 基金资助:
    国家863计划资助项目(2011AA02A111)

Methodology evaluation and biological variation research of enzymatic colorimetric assay for the determination of serum free fatty acid

LU Gang, GAO Shejun, JU Yingbo.   

  1. Department of Clinical Laboratory, the Fourth Affiliated Hospital of Hebei Medical University, Hebei Shijiazhuang 050011, China
  • Received:2013-07-10 Online:2014-02-20 Published:2014-02-20

摘要: 目的 评价血清游离脂肪酸(FFA)酶学比色法(简称酶法)的精密度和正确度, 并且研究血清FFA个体间和个体内生物学变异。方法 采用美国临床和实验室标准化协会(CLSI)EP5-A2和EP15-A文件评价酶法测定血清FFA的精密度和正确度。生物学变异的研究对象为13名健康志愿者, 在6周时间内每2周测定1次血清FFA浓度, 利用SAS9.1软件中MIXED分析过程计算个体间生物学变异和个体内生物学变异。结果 精密度实验样品的血清FFA浓度总均数为0.796 mmol/L, 批内、批间、日间和室内不精密度分别为2.15%、3.44%、3.67%和5.46%。测定3个室间质评样品的百分比偏差分别为24.20%、-0.90%、-1.50%。血清FFA个体间和个体内生物学变异分别为8.43%、19.36%。结论 酶法测定血清FFA的精密度和正确度能满足相关实验室质量控制要求。血清FFA的个体间和个体内生物学变异可为制定实验室质量规范和临床课题的科研设计提供参考依据。

关键词: 游离脂肪酸, 精密度, 正确度, 方法学评价, 生物学变异, 个体内生物学变异

Abstract: Objective To evaluate the precision and trueness of enzymatic colorimetric assay (enzymatic assay) for the determination of serum free fatty acid(FFA), and to study the between-subject and within-subject biological variations of serum FFA. Methods EP5-A2 and EP15-A were employed to evaluate the precision and trueness of serum FFA by enzymatic assay, which were published by the Clinical and Laboratory Standards Institute (CLSI). The serum samples from 13 healthy subjects for biological variation were collected and determined for FFA once every 2 weeks over a period of 6 weeks. The between-subject and within-subject biological variations were calculated by MIXED analysis of SAS9.1 software.Results The overall mean of serum FFA was 0.796 mmol/L, and imprecisions of within-batch, between-batch, inter-day and intra-laboratory were 2.15%, 3.44%, 3.67% and 5.46%, respectively. The deviations for the 3 external quality assessment control samples were 24.20%, -0.90% and -1.50%. The between-subject and within-subject biologicalvariations were 8.43% and 19.36%, respectively. Conclusions The precision and trueness of serum FFA by enzymatic assay could meet the requirements of relevant laboratory quality control. The between-subject and within-subject biological variations have important significations for establishing laboratory accreditation and providing clinical research design′s reference.

Key words: Free fatty acid, Precision, Trueness, Methodology evaluation, Biological variation, Within-subject biological variation

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