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Annals of Intensive Care

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%.
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