Laboratory Medicine ›› 2018, Vol. 33 ›› Issue (8): 760-763.DOI: 10.3969/j.issn.1673-8640.2018.08.020

• Orginal Article • Previous Articles     Next Articles

Analytical quality requirement of range comparison for multiple biochemical analyzers in clinical laboratories

XIE Wenge, LI Wen, HUANG Ning, LI Jinxing   

  1. Department of Clinical Laboratory,the Affiliated Hospital of Shandong University of Traditional Chinese Medicine,Jinan 250011,Shandong,China
  • Received:2017-12-10 Online:2018-08-10 Published:2018-09-07

Abstract:

Objective To evaluate biological variations,laboratory internal long-term imprecision and allowable coefficient of variation(CV) in range comparison,and to determine appropriate criteria for judgement.Methods According to WS/T 407—2012,the scheme of range comparison was established. With high-level and low-level of patients' fresh sera,19 biochemical items were determined by 3 biochemical instruments.Results For the 19 biochemical items,laboratory internal long-term imprecision and combined CV at the same level were < allowable CV,and 50% combined CV was >1/3 biological variation. Each comparison deviation was < allowable CV,and 50% comparison deviation was >1/3 biological variation. The 20% comparison deviation was > critical range.Conclusions Allowable CV can be used as a criterion for judgement,which is non-congener comparison(range comparison and standard deviation). The critical range belongs to congener comparison,which is strict slightly and can be used as a criterion for the combined usage with allowable CV. 1/3 Biological variation belongs to congener comparison and is too strict to be used as a criterion for judgement.

Key words: Analytical quality requirement, Range comparison, Comparability, Precision, Allowable coefficient of variation

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