Critical Care Research and Practice / 2019 / Article / Fig 1

Research Article

Determination of Electrolytes in Critical Illness Patients at Different pH Ranges: Whom Shall We Believe, the Blood Gas Analysis or the Laboratory Autoanalyzer?

Figure 1

Scatter plots presenting total measurements with ABG and AA for potassium (a) and sodium (b). Deviations in measurements of potassium with AA and ABG were all within the reference range of a maximum difference of 0.5 mmol/L overall and separately for distinct pH value ranges (a). For sodium, analysis demonstrated several variations above and below a threshold value of 4.0 mmol/L for all pH ranges (b). Solid line: identity between the measuring methods. Dashed lines: maximum tolerated difference according to the US CLIA.
(a)
(b)

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