Izvorni znanstveni članak

https://doi.org/10.11613/BM.2020.010707

Test validation, method comparison and reference range for the measurement of β-hydroxybutyrate in peripheral blood samples

Frank Bernhard Kraus ; Central Laboratory, University Hospital Halle, Halle (Saale), Germany; Institute of Biology, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
Marija Kocijancic ; Central Laboratory, University Hospital Halle, Halle (Saale), Germany
Alexander Kluttig ; Institute of Medical Epidemiology, Biostatistics and Informatics, Martin-Luther- University Halle-Wittenberg, Halle (Saale), Germany
Beatrice Ludwig-Kraus ; Central Laboratory, University Hospital Halle, Halle (Saale), Germany

Sažetak

Introduction: The measurement of β-hydroxybutyrate (βOHB) concentrations is a corner stone of the diagnosis of diabetic ketoacidosis and other ketonic states. The aim of this study was to perform a validation of a peripheral blood βOHB assay (Randox) on a Roche cobas c502 analyser and to establish a βOHB reference range for the validated assay.
Materials and methods: Precision, linearity and limit of detection and blank (LoD, LoB) were determined according to Clinical and Laboratory
Standards Institute (CLSI) EP05-A3, EP 06-A and EP17-A2 guidelines, using commercial control material and residual patient sample pools. As method comparison, for 190 semi-quantitative measurements of urine ketones we determined the corresponding βOHB blood concentration. The reference range was based on the CLSI C28-A3 guideline, using 304 randomly selected serum samples from population based German National Cohort (GNC) study.
Results: Coefficients of variation for the validated assay ranged from 1.5% for high concentrations (3.1 mmol/L) to 6.5% for low concentrations (0.1 mmol/L). Detection capacity was LoB = 0.011 mmol/L and LoD = 0.037 mmol/L. Linearity of the assay ranged from 0.10 to 3.95 mmol/L. The agreement between the semi-quantitative urine ketone test and the βOHB blood test was moderate (Kappa = 0.66). The obtained 95% serum reference range was estimated as 0.02 to 0.28 mmol/l βOHB.
Conclusions: The Ranbut βOHB assay showed good precision and analytical performance. Our results confirm that βOHB measurement in peripheral blood is indeed a preferable alternative to the semi-quantitative measurement of urine ketones.

Ključne riječi

β-hydroxybutyrate; ketoacidosis; method validation; reference range; urine ketones

Hrčak ID:

234147

URI

https://hrcak.srce.hr/234147

Datum izdavanja:

15.2.2020.

Posjeta: 873 *