Table 2.

Blood gas analysis.

	DAY 7	DAY 13
O2 NASAL (L/MIN)	4	0
pH	7.398	7.462	μg/L	[7.36 to 7.44]
PCO2	33.1	32.4	mm Hg	[35 to 45]
PO2	96.2	76.4	mm Hg	[85 to 105]
HCO3-	20	22.6	mmol/L	[21 to 27]
BE	−4.1	−0.5	mmol/L	[−2.0 to 3.0]
A-aDO2	122.1	33.2	mm Hg	[<10]
Lac	2.2	1.7	mmol/L	[0.5 to 1.6]

The reference ranges of data are shown in brackets. pH, potential of hydrogen; PCO₂, partial pressure of carbon dioxide; PO₂, partial pressure of oxygen; HCO₃⁻, actual bicarbonate; BE, actual base excess; A-aDO₂, alveolar-arterial oxygen difference; Lac, lactate. A-aDO₂ (Day 7) = [{ (760 − 47) × 0.21}-PCO₂/0.8] − PO₂ A-aDO₂ (Day 13) = [{ (760 − 47) × 0.364} − PCO2/0.8] − PO₂