Table 2

Arterial, mixed venous and mesenteric venous blood gases, and arterial lactate at basal conditions, during ischemia and after 30 and 60 minutes of reperfusion

Reperfusion

Parameter

Basal

Ischaemia

30 min

60 min

Arterial pH

7.37 ± 0.03

7.36 ± 0.05

7.33 ± 0.05*

7.36 ± 0.04

Arterial PCO₂ (mmHg)

38 ± 4

35 ± 5*

36 ± 4

36 ± 5

Arterial PO₂ (mmHg)

77 ± 9

80 ± 15

75 ± 10

78 ± 8

Arterial HCO₃^- (mmol/l)

22 ± 3

19 ± 2*

19 ± 2*

20 ± 2*

Arterial base excess (mmol/l)

-3 ± 3

-5 ± 2*

-6 ± 2*

-4 ± 3*

Mixed venous pH

7.34 ± 0.03

7.26 ± 0.03*

7.28 ± 0.04*

7.32 ± 0.04

Mixed venous PCO₂ (mmHg)

43 ± 4

48 ± 5*

43 ± 4

42 ± 3

Mixed venous PO₂ (mmHg)

38 ± 4

23 ± 3*

37 ± 4

39 ± 4

Mixed venous HCO₃^- (mmol/l)

23 ± 3

21 ± 3

20 ± 2

21 ± 2

Mixed venous base excess (mmol/l)

-3 ± 3

-6 ± 3*

-7 ± 2*

-5 ± 2*

Mesenteric venous pH

7.34 ± 0.03

7.26 ± 0.03*

7.30 ± 0.05*

7.32 ± 0.04

Mesenteric venous PCO₂ (mmHg)

42 ± 5

49 ± 5*

41 ± 4

41 ± 4

Mesenteric venous PO₂ (mmHg)

43 ± 7

26 ± 3*

42 ± 6

43 ± 5

Mesenteric venous HCO₃^- (mmol/l)

23 ± 3

22 ± 2

20 ± 2*

21 ± 2

Mesenteric venous base excess (mmol/l)

-3 ± 3

-5 ± 2*

-6 ± 2*

-5 ± 2*

Arterial lactate (mmol/l)

1.6 ± 0.5

3.7 ± 1.7*

3.9 ± 2.0*

3.2 ± 1.5*

Values are expressed as mean ± standard deviation. *P < 0.05 versus basal. PCO₂, partial carbon dioxide tension; PO₂, partial oxygen tension.

Dubin et al. Critical Care 2005 9:R556   doi:10.1186/cc3797