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Table 2 Gas exchange at different study times

From: A recruitment maneuver increases oxygenation after intubation of hypoxemic intensive care unit patients: a randomized controlled study

  Before intubation 30 seconds after intubation 5 minutes after intubation 30 minutes after intubation
pH     
Control group (n = 20) 7.27 ± 0.1 7.22 ± 0.1 7.22 ± 0.2 7.27 ± 0.1
RM group (n = 20) 7.36 ± 0.1 7.29 ± 0.1 7.29 ± 0.1 7.30 ± 0.1
PaCO 2 (mmHg)     
Control group (n = 20) 49 ± 12 53 ± 10 52 ± 8 46 ± 6
RM group (n = 20) 44 ± 12 54 ± 15 51 ± 12 51 ± 11
PaO 2 (mmHg)     
Control group (n = 20) 79 (73-87) 89 (78-116) 85 (74-109) 95 (82-125)
RM group (n = 20) 73 (63-92) 71 (56-105) 246 (128-303)*# 171 (119-241)*#
SaO 2 (%)     
Control group (n = 20) 94 ± 4 93 ± 4 92 ± 5 96 ± 4
RM group (n = 20) 92 ± 5 90 ± 9 97 ± 3*# 97 ± 3
  1. All PaO2 values were sampled at a fraction of inspired oxygen of 1, except before intubation, when oxygen flow delivery was 10 to 15 L/min.
  2. Data are presented as means ± standard deviation. * P < 0.05 compared with the value obtained before intubation. # P < 0.05 for a difference between groups. All data are mean ± standard deviation expect for PaO2 median (75-25).
  3. PaCO2: partial pressure of arterial carbon dioxide; PaO2: partial pressure of arterial oxygen; RM: recruitment manœuvre; SaO2: arterial oxygen saturation.