Table 3. Arterial blood gas results on admission and after 24 hours.

Test	Admission: on 4 liters of oxygen	24 hours: on 40% oxygen	Units	Normal range
pH	7.48	7.42	-	7.35–7.45
PaO2	11.8	9.1	kPa	9.5–14.0
paCO2	4.1	3.9	kPa	4.5–6.0
HCO3	22.3	21.9	mmol/L	22.0–28.0
Lactate	0.8	1.1	mmol/L	<1.0
Glucose	6.2	6.1	mmol/L	4.4–7.8