Laboratory Medicine ›› 2022, Vol. 37 ›› Issue (5): 449-455.DOI: 10.3969/j.issn.1673-8640.2022.05.011

• Original article • Previous Articles     Next Articles

A multi-center evaluation of a domestic glutathione reductase determination kit

ZHU Yuqing1, WANG Haibin2, WANG Lianming3, ZHAO Fang4, FENG Pinning5, ZHANG Peng6, GUO Shuren7, PENG Yibing8, CHENG Liming9, CHUAN Liangmin10, WANG Hualiang1()   

  1. 1. Department of Clinical Chemistry and Immunology,Shanghai Center for Clinical Laboratory,Shanghai 200126,China
    2. Clinical Laboratory Center,Chinese People's Liberation Army General Hospital,Beijing 100039,China
    3. Department of Clinical Laboratory,the First Affiliated Hospital of Harbin Medical University,Harbin 150001,Heilongjiang,China
    4. Department of Clinical Laboratory,Peking Union Medical College Hospital,Chinese Academy of Medical Sciences,Beijing 100730,China
    5. Department of Clinical Laboratory,the First Affiliated Hospital of Sun Yat-sen University,Guangzhou 510080,Guangdong,China
    6. Department of Clinical Laboratory,Nanfang Hospital,Southern Medical University,Guangzhou 510515,Guangdong,China
    7. Department of Clinical Laboratory,the First Affiliated Hospital of Zhengzhou University,Zhengzhou 450052,Henan,China
    8. Department of Clinical Laboratory,Ruijin Hospital,Shanghai Jiao Tong University School of Medicine,Shanghai 200025,China
    9. Department of Clinical Laboratory,Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology,Wuhan 430030,Hubei,China
    10. Department of Clinical Laboratory,Sichuan Provincial People's Hospital,Chengdu 610072,Sichuan,China
  • Received:2021-11-30 Revised:2022-01-25 Online:2022-05-30 Published:2022-07-20
  • Contact: WANG Hualiang

Abstract: Objective To investigate the performance of a domestic glutathione reductase(GR) determination kit through a multi-center evaluation. Methods Totally,9 clinical laboratories of tertiary hospitals located in different geographic regions of China formed a multi-center evaluation group. According to the same evaluation scheme,the repeatability,within-laboratory precision,between-run variations,linearities,the maximum dilution ratio and estimation of bias of a domestic GR determination kit were investigated,which were classified and compared. Results The repeatability and within-laboratory precision of the 9 laboratories met the requirements [less than 1/4 standard of external quality assessment(EQA)(5%) and 1/3 standard of EQA(6.67%),respectively]. Except a low-level sample of one laboratory and a middle-level sample of another laboratory(>8%),the between-run variations of all the other laboratories met the manufacturer's stated requirements. All the laboratories demonstrated the linear range claimed by the manufacturer. The recovery rates at maximum dilution ratio(5 times) of the 9 laboratories were 92.6%-106.3%. In the estimation of bias by using 40 patient samples compared with imported reagent,the correlation coefficients(r) were 0.997-1.000,the biases were less than 1/2 standard of EQA(10%). There was a significant correlation among the results of the 9 laboratories in the imported group and the domestic group respectively(P<0.01). The consistency of imported reagent and domestic reagent was good,and the difference of paired t-test was not significant statistically(P>0.05),and the correlation coefficients(r) were 1.000(P<0.01). The average coefficient of variation(CV) of imported reagent and domestic reagent was 6.48% and 6.68%,respectively. Pairwise paired t-test was performed on the results of instrument group A,B and C. There was statistical significance between group B and C for domestic reagent(P<0.01). There was statistical significance between group A and C,B and C for imported reagent(P<0.01). Conclusions The results of the multi-center evaluation show that the performance of the domestic GR reagent is good,and it can meet the clinical determination needs.

Key words: Glutathione reductase, Multi-center evaluation, Determination performance