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Table 2 Summary of potassium values according to the sampling sites and analytical method used

From: Intra-patient potassium variability after hypothermic cardiac arrest: a multicentre, prospective study

 Median (IQR)Mean ± SDRange
Blood gas analyser
 Central venous (n = 12)4.36 (3.09–7.57)5.66 ± 3.762.2–14.6
 Femoral artery (n = 14)4.75 (3.71–11.2)7.09 ± 4.462.5–15
 Peripheral venous (n = 12)4.55 (3.65–7.4)5.77 ± 3.232.6–13
Central laboratory
 Central venous (n = 11)3.8 (3.1–6.4)4.95 ± 2.842.1–11.3
 Femoral artery (n = 11)4.8 (4.04–10.3)7.05 ± 5.083–19
 Peripheral venous (n = 11)4.2 (3.4–6.4)5.72 ± 4.252.3–17.2