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Table 2 Precision analysis

From: Earlobe arterialized capillary blood gas analysis in the intensive care unit: a pilot study

  Mean CV% (range)
  Capillary + EABC®/i-STAT® Arterial + ABL 700®
PO2 9.8 (4.2 to 15.8) 4.3 (1.8 to 9.3)
pH 0.3 (0.2 to 0.4) 0.1 (0.08 to 0.1)
PCO2 7.7 (1 to 16.1) 3.1 (2 to 5.3)
Lactate 13.8 (3.8 to 21.1) 26.8 (4 to 66.6)a
  1. CV, coefficient of variation.
  2. aPrecision of in vitro lactate measures improves with increasing lactate concentrations, therefore mean CV should be interpreted accordingly. At blood lactate concentrations > 2 mmol/L/18 mg/dl, CV decreases below 10%.