Research ArticleOriginal Article
Open Access

Comparison of different methods for measurement of electrolytes in patients admitted to the intensive care unit

Sinan Yılmaz, Hilal B. Uysal, Mücahit Avcil, Mustafa Yılmaz, Bekir Dağlı, Murat Bakış and Imran K. Ömürlü
Saudi Medical Journal March 2016, 37 (3) 262-267; DOI: https://doi.org/10.15537/smj.2016.3.13539

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  • Figure 1
    Figure 1

    The correlation of sodium levels. A) A Bland-Altman comparison of AA and ABG for the Na measurement revealed that the limits of agreement were -9.4 to 12.6 mmol/L. Relationship between Na levels measured by 2 analyzing methods. Pearson’s correlation coefficient (r): (r: 0.561, p<0.001). B) Bland-Altman comparison of AA and ABG for Na showing the 95% limits of agreement. Plot of the difference of 2 methods against the mean of 2 methods for Na measurement. Solid line - mean difference, dashed lines - mean difference plus or minus 2 standard deviations, Na - Sodium, AA - auto-analyzer, ABG - arterial blood gas analyzer.

  • Figure 2
    Figure 2

    The correlation of potassium (K) levels. A) Relationship between K levels measured by 2 analyzing methods. Pearson’s correlation coefficient(r) (r: 0.812, p<0.001). B) Bland-Altman comparison of AA and ABG for K showing the 95% limits of agreement. Plot of the difference of 2 methods against the mean of 2 methods for K measurement. Solid line - mean difference, dashed lines - mean difference ±2 SD, AA - auto-analyzer, ABG - arterial blood gas analyzer

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