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. 2017 Feb 15;27(1):225-230.
doi: 10.11613/BM.2017.024.

Stability of plasma electrolytes in Barricor and PST II tubes under different storage conditions

Luis Alfredo Bautista Balbás  1 , Marta Segovia Amaro  1 , Rubén Gómez Rioja  1 , María José Alcaide Martín  1 , Antonio Buńo Soto  1
Affiliations

Stability of plasma electrolytes in Barricor and PST II tubes under different storage conditions

Luis Alfredo Bautista Balbás et al. Biochem Med (Zagreb). .

Abstract

Introduction: Sample stability can be influenced by many different factors; evaporation and leakage from residual cells are the most relevant factors for electrolytes. During the analytical phase, samples are usually kept uncapped at room temperature. Once samples are processed, they are usually stored sealed and refrigerated. Long turnaround time and the possibility of "add-on test" need consideration for electrolyte stability. The aim of our study is to examine short-term electrolyte stability in this two-common laboratory working conditions in two different lithium heparin plasma tubes (Barricor and PST II, Becton Dickinson).

Materials and methods: In 39 plasma samples from voluntary subjects we measured sodium (Na+), potassium (K+) and chloride (Cl-) at 6 time points since centrifugation (0h, 3h, 6h, 9h, 12h and 15h). Maximum allowable bias (clinically significant change) was based in SEQC (Sociedad Espańola de Química Clínica) recommendations; 1% for Cl-, 0.6% for Na+ and 4% for K+.

Results: In open room temperature tubes, clinically significant changes appeared in Na+ and Cl- after 3 hours and in K+ after 9 hours in both types of tubes. In refrigerated sealed tubes, all the analytes were clinically stable up to 12 hours in both kinds of plasma tubes. We observed a statistically significant progressive increase in K+ levels, which was less pronounced in Barricor tubes.

Conclusion: Stability of electrolytes is compromised after 3 hours in open tubes and after 12 hours in sealed tubes.

Keywords: electrolyte; potassium; specimen handling.

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Conflict of interest statement

None declared.

Figures

Figure 1
Figure 1
Stability curves in different groups.
rt – room temperature.
See this image and copyright information in PMC

References

    1. Kift RL, Byrne C, Liversidge R, Babbington F, Knox C, Binns J, et al. The effect of storage conditions on sample stability in the routine clinical laboratory. Ann Clin Biochem. 2015;52:675–9. https://doi.org/10.1177/0004563215580000 10.1177/0004563215580000 - DOI - DOI - PubMed
    1. Burtis CA. Sample evaporation and its impact on the operating performance of an automated selective-access analytical system. Clin Chem. 1990;36:544–6. - PubMed
    1. Oddoze C, Lombard E, Portugal H. Stability study of 81 analytes in human whole blood, in serum and in plasma. Clin Biochem. 2012;45:464–9. https://doi.org/10.1016/j.clinbiochem.2012.01.012 10.1016/j.clinbiochem.2012.01.012 - DOI - DOI - PubMed
    1. Boyanton BL, Blick KE. Stability studies of twenty-four analytes in human plasma and serum. Clin Chem. 2002;48:2242–7. - PubMed
    1. Becton Dickinson. Within-Tube Stability of Selected Routine Chemistry Analytes and Immunoassays in BD Vacutainer® Barricor™ Tubes in Comparison with BD Vacutainer® PST™ II and SST™ II Advance Tubes at Multiple Time Points Post Centrifugation. BD White Paper VS9295-OUS-WP. NJ, USA. 2016.

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