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Table 2 Variables of arterial blood gas analyses during different time periods

From: Hemodynamic effects of short-term hyperoxia after coronary artery bypass grafting

Variable

T1

T2

T3

Pre

Hyperoxia

Post

FiO2 (%)

25 (21–30)

90 (90–90)

21 (21–25)

Arterial blood gas analysesa

 SaO2 (%)

94.9 (1.9)

99.0 (0.3)***

95.7 (1.8)

 PaO2 (mmHg)

83.5 (12.2)

390.2 (93.2)***

87.8 (21.5)

 PaCO2 (mmHg)

39.8 (8.1)

36.0 (7.9)**

34.5 (8.7)***

 Hb (mmol L−1)

7.2 (0.8)

7.4 (0.7)

7.4 (0.8)

 Ht (L L−1)

0.34 (0.04)

0.35 (0.03)

0.35 (0.04)

 Glucose (mmol L−1)

7.5 (1.6)

7.4 (1.7)

7.7 (1.8)

 Lactate (mmol L−1)

1.25 (0.38)

1.20 (0.40)

1.25 (0.34)

  1. Data are means (SD). For FiO2, medians (interquartile range) are provided
  2. FiO 2 fraction of inspired oxygen, SaO 2 arterial oxygen saturation, PaO 2 partial pressure of arterial oxygen, PaCO 2 partial pressure of arterial carbon dioxide, Hb hemoglobin, Ht hematocrit
  3. P < 0.01; ** P < 0.001; *** P < 0.0001 for paired comparison between indicated outcome and baseline (T1)
  4. aArterial blood gas samples analyzed prior to the start of hemodynamic measurement