Laboratory Medicine ›› 2019, Vol. 34 ›› Issue (12): 1128-1132.DOI: 10.3969/j.issn.1673-8640.2019.12.015

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Comparability of routine biochemical indexes between dry chemistry and wet chemistry analysis systems

GU Dongmei1, SUN Ying2, JIA Zichao1, FAN Liming1, REN YanNü1, ZHANG Hua1, YUAN Yuhua1, LUO Wei1   

  1. 1. Department of Clinical Laboratory,Tianjin Medical University General Hospital,Tianjin 300052,China
    2.Tianjin Heping District Center for Disease Control and Prevention,Tianjin 300070,China
  • Received:2018-11-30 Online:2019-12-30 Published:2020-01-03

Abstract:

Objective To investigate the comparability of routine biochemical indexes between dry chemistry and wet chemistry analysis systems. Methods The within-run precisions and intermediate precisions for middle and high values of quality control materials were determined by AU 5800 automatic biochemical analyzer and VITROS 5600 automatic biochemical immune analyzer. According to the Clinical and Laboratory Standards Institute(CLSI) document EP15-A2,AU 5800 automatic biochemical analyzer was used as comparative system,and VITROS 5600 automatic biochemical immune analyzer was used as experimental system. Totally,18 routine biochemical indexes were determined by the 2 systems. The correlation and bias between the comparative system and experimental system were evaluated and calculated by linear regression analysis. Linear regression equation and r were obtained,and the bias between the 2 systems was evaluated. Result The within-run precisions and intermediate precisions for the 18 routine biochemical indexes were all lower than precision requirement. Except for lactate dehydrogenase,the other indexes showed good correlations between the 2 systems(r2>0.95). The biases for gamma glutamyltransferase,total bilirubin,uric acid,Cl,Ca,CO2,glucose and total protein were acceptable. The biases for alanine aminotransferase,aspartate aminotransferase,lactate dehydrogenase and creatinine were unacceptable. The biases for alkaline phosphatase,urea,creatine kinase,K,Na and albumin were acceptable at certain concentrations. Conclusions AU 5800 automatic biochemical analyzer and VITROS 5600 automatic biochemical immune analyzer display good correlation. The biases for a part of indexes are acceptable. It is necessary to establish the different reference intervals aiming at different methods.

Key words: Dry chemistry, Wet chemistry, Routine biochemical index, Analysis system

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