Agreement between arterial and venous pH, bicarbonate, lactate, and base excess (all samples)
| Variable | No. of samples | Mean difference (venous – arterial) | 95% limits of agreement |
|---|---|---|---|
| pH | 168 | −0.03 pH units | −0.07 to 0.01 |
| Bicarbonate | 168 | 0.52 mmol/l | −1.81 to 2.85 |
| Lactate | 167 | 0.08 mmol/l | −0.27 to 0.42 |
| Base excess | 165 | 0.19 mmol/l | −1.86 to 2.24 |