J Lab Med Qual Assur.  2016 Jun;38(2):87-94. 10.15263/jlmqa.2016.38.2.87.

Performance Evaluation of Automated Chemistry Analyser for Urine Chemistry Test

Affiliations
  • 1Department of Laboratory Medicine and Genetics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea. lywmd@schmc.ac.kr

Abstract

BACKGROUND
Prompt and accurate urine chemistry analysis is important to provide information for diagnosis and therapy. In this study, we evaluated the overall performance and utility of an automated chemistry analyser for urine chemistry testing in accordance with Clinical and Laboratory Standards Institute guidelines.
METHODS
From January 2015 to March 2015, we evaluated the precision, linearity, limits of detection, carryover, and turnaround times after automation of nine items: total protein, albumin, glucose, blood urea nitrogen, total calcium, magnesium, inorganic phosphate, creatinine, and uric acid. A Hitachi 7600-110 instrument (Hitachi Ltd., Japan) and Hitachi ID Privileged Access Manager (Hitachi Ltd.) were used for automated chemistry analysis and sample preparation, respectively.
RESULTS
Regarding precision, the coefficient of variation was 3.9% to 1.6% for high levels and 3.3% to 24.1% for low levels. The linearity and coefficients of determination of all the test items were acceptable. Performance comparison revealed that the two systems were comparable, as evidenced by correlation coefficients >0.975 for most items; moreover, carryover of all items was <1%. The mean turnaround time was 59 minutes.
CONCLUSIONS
Urine chemistry testing can be performed with acceptable precision, linearity, and performance by using the Hitachi 7600-110 automated chemistry analyser. The sample preparation system reduces turnaround time, which enhances the clinical utility of urine chemistry testing.

Keyword

Urine clinical chemistry test; Automation; Precision; Correlation; Turnaround time

MeSH Terms

Automation
Blood Glucose
Calcium
Chemistry*
Creatinine
Diagnosis
Limit of Detection
Magnesium
Nitrogen
Urea
Uric Acid
Blood Glucose
Calcium
Creatinine
Magnesium
Nitrogen
Urea
Uric Acid
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