Performance evaluation of the semi-automated urine analyser DFI R-600S

Objective: The major considerations of the urine analysis performed in laboratories are to obtain a fast and accurate test result. Increasing number of instruments and methods have been developed for making it possible. The aim of this study is to compare the performance of the DFI R600S with that of the Roche Cobas U411. Methods: Five hundred thirty three freshly obtained out- and in-patient routine urine samples collected. We conducted an analysis using results from urine dipstick tests that measure ten parameters: glucose, protein, bilirubin, urobilinogen, pH, specific gravity, ketones, red blood cells, nitrite, and leukocytes. Both analyzers were utilized in the process, followed by a microscopic examination of the urinary sediment. Results: It was determined that the pH and specific gravity tests showed poor concordance, while the remaining tests exhibited moderate to very good concordance between the manual microscopic method and the individual devices. Conclusion: The semi-automated test strip analyzer DFI R600S offers low cost, easy to use and reliable first level screening method for urinalysis but it is important to be aware of conditions produce false-positive or false-negative results of the urine dipstick.