Table 2 Summary of potassium values according to the sampling sites and analytical method used
|  | Median (IQR) | Mean ± SD | Range |
|---|---|---|---|
Blood gas analyser | |||
 Central venous (n = 12) | 4.36 (3.09–7.57) | 5.66 ± 3.76 | 2.2–14.6 |
 Femoral artery (n = 14) | 4.75 (3.71–11.2) | 7.09 ± 4.46 | 2.5–15 |
 Peripheral venous (n = 12) | 4.55 (3.65–7.4) | 5.77 ± 3.23 | 2.6–13 |
Central laboratory | |||
 Central venous (n = 11) | 3.8 (3.1–6.4) | 4.95 ± 2.84 | 2.1–11.3 |
 Femoral artery (n = 11) | 4.8 (4.04–10.3) | 7.05 ± 5.08 | 3–19 |
 Peripheral venous (n = 11) | 4.2 (3.4–6.4) | 5.72 ± 4.25 | 2.3–17.2 |