CLIN CHEM LAB MED:目前的高敏感性心肌肌钙蛋白检测是否适用?

2020-02-04 MedSci MedSci原创

通过检测高敏感性心肌肌钙蛋白T/I (hs-cTnT/I)提高了心肌梗死(MI)检测的分析敏感性。

通过检测高敏感性心肌肌钙蛋白T/I (hs-cTnT/I)提高了心肌梗死(MI)检测的分析敏感性。为了获得临床特异性和敏感性,对cTn浓度随时间变化的解释是至关重要的。2015ESC NSTEMI指南将绝对增量值定义为MI的附加排除或纳入规则。 应用此规则的一个关键假设是,增量期内的总分析误差(包括仪器间偏差)与验证研究中的分析误差相当。

研究人员采用来自荷兰外部质量评估计划(EQAS)的数据用于计算仪器间偏差,并估计与建议的增量值相关的测量范围的不准确性:对于Roche Elecsys hs-cTnT5–525–12 ng / L; 对于Abbott Architecths-cTnI,分别为2–52 ng / L2–5 ng / L,分别用于规则输入和规则输出。

分析表明,对于Elecsys,仪器间偏差的中位数为0.3 ng / Ln = 33个实验室),因此对于不精确的规则输入和规则输出,与制造商声称类似,参考变化值(RCV)分别为3.01.7 ng / L。由于RCV小于准则的差异阈值,因此所有实验室具有足够的规格。 根据EQA数据估算,排除/排除的RCV分别增加到4.6 ng / L / 2.5 ng / L,有个别不精确之处,导致有64%和82%的实验室具有适当的规格。 对于Architect,有40%的仪器(n = 10)可能错误地将结果认定为与临床相关; 因此,无法确定规格间的偏差。

因此本研究建议实验室使用快速0 / 1-h算法在相关/低浓度水平下引入严格的内部质量程序,尤其是当随机使用多个分析仪时。

原始出处:

Eline A.E. van der HagenChrista M. CobbaertFast 0/1-h algorithm for detection of NSTEMI: are current high-sensitivity cardiac troponin assays fit for purpose? An EQA-based evaluation

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