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  • Title: Reliability of the Lactate Scout point-of-care instrument for the determination of blood L-lactate concentration in sheep.
    Author: Kaynar O, Karapinar T, Hayirli A, Baydar E.
    Journal: Vet Clin Pathol; 2015 Dec; 44(4):559-63. PubMed ID: 26348369.
    Abstract:
    BACKGROUND: Data on accuracy and precision of the Lactate Scout point-of-care (POC) analyzer in ovine medicine are lacking. OBJECTIVE: The purpose of the study was to assess the reliability of the Lactate Scout in sheep. MATERIALS AND METHODS: Fifty-seven sheep at varying ages with various diseases were included. Blood lactate concentration in samples collected from the jugular vein was measured immediately on the Lactate Scout. Plasma L-lactate concentration was measured by the Cobas autoanalyzer as the reference method. Data were subjected to Student's t-test, Passing-Bablok regression, and Bland-Altman plot analyses for comparison and assessment of accuracy, precision, and reliability. RESULTS: Plasma l-lactate concentration was consistently lower than blood L-lactate concentration (3.06 ± 0.24 vs 3.3 ± 0.3 mmol/L, P < .0001). There was a positive correlation between plasma and blood L-lactate concentrations (r = .98, P < .0001). The Lactate Scout had 99% accuracy and 98% precision with the reference method. Blood (Y) and plasma (X) L-lactate concentrations were fitted to Y = 0.28 + 1.00 · X, with a residual standard deviation of 0.31 and a negligible deviation from the identity line (P = .93). The bias was fitted to Y = 0.10 + 0.05 · X, with Sy.x of 0.44 (P < .07). CONCLUSIONS: The Lactate Scout has high accuracy and precision, with a negligible bias. It is a reliable POC analyzer to assess L-lactate concentration in ovine medicine.
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