Abstract
Three portable blood lactate analysers, Lactate Pro (LP), Lactate Scout (LS) and Lactate Plus (L+), were evaluated. Analyser reliability and accuracy was assessed. For reliability, intra- and inter-analyser comparisons demonstrated that the LP (intra-TE = 0.5 mM, inter-TE = 0.4 mM) and L+ (intra-TE = 0.4, inter-TE = 0.4 mM) displayed greater overall reliability than the LS (intra-TE = 1.0, inter-TE = 0.8 mM). At BLa < 4.0 mM, the LP (intra-TE = 0.1 mM) demonstrated greater reliability than the LS (intra-TE = 0.5 mM) and L+ (intra-TE = 0.4 mM). At BLa > 8.0 mM, the LP (intra-TE = 0.5 mM, inter-TE = 0.4 mM) and L+ (intra- and inter-TE = 0.4 mM) displayed greater reliability than the LS (intra-TE = 1.1 mM, inter-TE = 0.9 mM). For accuracy, the L+ (SEE = 0.6 mM) compared more favourably to the LP than the LS (SEE = 1.1 mM). At BLa ~1.0–18.0 mM, the LS produced values that were up to 0.9 mM higher than the LP; the L+ produced BLa that were within ±0.1 mM. All portable analysers tended to under-read the ABL 700 analyser. The suitability of the LP and L+ as accurate analysers is supported by strong correlations (r = 0.91 and r = 0.94) and limits of agreement ≤2.1 mM. This study showed that the LP and L+, compared well to each other, displayed good reliability and accuracy when compared to a laboratory-based analyser. Although the LS also displayed relatively good reliability, it was not as reliable or accurate as the LP or L+.
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Acknowledgments
Funding for this project was provided by the National Sport Science Quality Assurance program and the Australian Institute of Sport. Lactate analysers and materials were kindly provided by KDK Japan, SensLab GmbH, Germany and Nova Biomedical, USA. The authors also thank Prof. David Pyne for his assistance in the preparation of the manuscript.
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Communicated by Susan Ward.
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Tanner, R.K., Fuller, K.L. & Ross, M.L.R. Evaluation of three portable blood lactate analysers: Lactate Pro, Lactate Scout and Lactate Plus. Eur J Appl Physiol 109, 551–559 (2010). https://doi.org/10.1007/s00421-010-1379-9
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DOI: https://doi.org/10.1007/s00421-010-1379-9