Resumo

MARTIN, Hugo Guillermo; FERNANDEZ, Virginia Pilar; KIENER, Andrea Gisel del Milagro  e  DE ELIAS BOQUE, Rafael Francisco. Desempeño del analizador de orinas Laura XL-Erba Mannheim en comparación con el iRICELL-Beckman Coulter en una población general. Acta bioquím. clín. latinoam. [online]. 2023, vol.57, n.4, pp.2-2. ISSN 0325-2957.

The objectives of this work were to evaluate the performance of the Laura XL® Erba Mannheim urine analyzer, in comparison with the iRICELL® Beckman Coulter analyzer, and to assess the determination of semiquantitative urinary protein as screening in its study, establishing a cut-off point for its quantification. A total of 225 urine samples were simultaneously processed. pH, density, turbidity, colour, hemoglobin, glucose, ketones, nitrites, proteins, and number of positive reactive strips were evaluated; and epithelial cells, leukocytes, red blood cells and criteria for normality of the sediment were evaluated by microscopy. Positive urinary proteins per strip were quantified on a Modular COBAS® 8000 (Hitachi-Roche). Cohen’s Kappa concordance coefficient (k) and Spearman’s correlation index were used. Little agreement was obtained in turbidity (k=0.334), good agreement in colour (k=0.681), hemoglobin (k=0.620), glucose (k=0.677), ketones (k=0.768), nitrites (k=0.827), positive test strips (k=0.620), epithelial cells (k=0.783), leukocytes (k=0.745) and red blood cells (k=0.609); very good agreement for proteins (k=0.842) and sediment normality criteria (k=1,000). Statistically significant correlation in pH (r=0.8064; p<0.0001), density (r=1.000; p<0.0001), urinary protein (rs=0.9157; p<0.0001) compared with COBAS® 8000. A satisfactory performance of Laura XL® was concluded, showing a performance consistent with the needs and regulations of this institution, and its usefulness is endorsed as a screening test for the assessment of urinary proteins, establishing the quantification of urines that present 1+ or more per strip in Laura XL®. Software improvements are considered.

Palavras-chave : Complete urine study; Urianalysis; Urine analyzer; Comparison of methods; Proteinuria; Laura XL analyzer; iRICELL analyzer.

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