Comparison of outcome biases regarding the two modes of sample aspiration offered by the olympus AU2700 automatic biochemical analyzer

Abstract

Objectives: To evaluate the comparability of the test outcome or the acceptability of the outcome bias regarding the 2 modes of sample aspiration offered by the Olympus AU2700 automatic biochemical analyzer and to determine whether calibration and internal quality control are required when using the sample aspiration mode for a statistics (STAT) table. Methods: Per the procedures outlined in the National Committee for Clinical Laboratory Standards-EP9-A2 protocol, 16 tests were performed for analytes such as alanine aminotransferase, total protein, and urea to evaluate and compare the outcome bias between the mode used with racks and that used with the STAT table. Forty serologic samples were tested. Results: Among the results of the 16 tests, almost all levels of outcome bias were acceptable. The sole exception was that regarding the TG test, in which system error reached 6.89%; this amount exceeds the 6.25% allowable percentage of error at lower concentrations. Conclusion: Based on these data, we conclude that calibration and internal quality control are unnecessary when using the sample aspiration mode of the STAT table. © 2012 by the American Society for Clinical Pathology.