Abstract:

Objective To study the determination quality of microbiology external quality assessment (EQA) of bacterial ide.pngication items in Shanghai medical institutions for past 23 years.Methods Firstly, the EQA activity frequency, grouping, quality control material characteristic, transportation mode and returning way were analyzed. The results of microbiology bacterial ide.pngication items among participating laboratories in EQA of Shanghai Center for Clinical Laboratory (SCCL) from 1992 to 2014 were collected and analyzed statistically. The coincidence for the determinations of 14 major bacteria was analyzed statistically. Results EQA activity frequency reduced from 4 times per year to 2 times per year, and the number of samples increased from 3 samples per time to 5 samples per time. Subjects were not classified before, and now subjects did grouping. Before 2007, quality control materials were puncture-like semi-solid, after that, quality control materials were treated by freeze-drying technology as lyophilized form. Transportation modes were from taking by medical personnels themselves to cold chain system delivery in order to monitor whole process. Returning way was from paper to web uploading. The number of participating laboratories increased from 80 to 134 now, and the increasing rate was about 68%. The pass rate (score ≥80) and the excellent rate (score=100) increased year by year. The pass rate in 2014 was 100%, and the excellent rate in 2014 was 90%. The participating isolates were 23 genera with 105 kinds, and the coincidence rates of Staphylococcus, Enterococcus and Enterobacteriaceae ide.pngication were high, and many of them reached 100%. Conclusions The change of EQA activity mode makes it more equitable and standard for quality assessment. The microbiology bacterial ide.pngication quality increases year by year in Shanghai medical institutions, providing accurate results for clinic.

Key words: Microorganism, External quality assessment, Quality management