Analysis of the inter-lab comparability and intra-lab precision of blood gas and acid-base testing
10.3760/cma.j.issn.1009-9158.2013.12.006
- VernacularTitle:全国血气和酸碱分析室间质评及室内质控数据调查结果分析
- Author:
Haijian ZHAO
;
Chuanbao ZHANG
;
Falin HE
;
Rong MA
;
Jiangtao ZHANG
;
Zhiguo WANG
- Publication Type:Journal Article
- Keywords:
Blood gas analysis;
Quality control;
Laboratories,hospital;
Evaluation studies
- From:
Chinese Journal of Laboratory Medicine
2013;36(12):1085-1090
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the comparability between laboratories and the performance of precision in clinical laboratories for blood gas and acid-base analysis by external quality assessment (EQA) and internal quality control (IQC).Methods Fifteen vials of EQA materials were distributed to the laboratories by global Express Mail Services (EMS).The activities were carried out three times,five-level samples were determined every time.After the measurement results and coefficients of variation of internal quality control data of April were reported,the collected data were divided into peer groups based on laboratory instruments.The medians of each group were taken as the target value to analyse the pass rate and coefficient of variation (CV) of each group after the removal of outliers.Internal quality control data was collected by Web-based the EQA software acquisition system which collect the CVs of the control data of nationwide blood gas and acid-base analysis project in April 2012 internal quality control,the CVs of IQC data were compared according to analyzers and testing items after the removal of outliers.All the data were analyzed using EXCEL 2007 and SPSS.Results A total of 570 laboratories participate in the EQA scheme.The CV of Inter-laboratory of PO2 was largest in all the same instrument groups; For the same item,Siemens group displayed larger CVs than other instrument groups.A total of 525 laboratories returned internal quality control data in accordance with the provisions,there are no significant difference in CVs among the same instrument group and among the same test of inter-instrument.Conclusions The comparability of results for blood gas and acid-base analysis are mostly good between laboratories in China,besides,some of which need to improve.The laboratories should pay more attention to IQC so as to secure the reliability of results.
