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Table 2 Intraoperative blood gas analysis, respiratory mechanics and hemodynamics

From: Effects of intraoperative lung-protective ventilation on clinical outcomes in patients with traumatic brain injury: a randomized controlled trial

   Group A (n = 25) Group B (n = 28) Group C (n = 26) P
PaO2, mmHg T1 419.0 (381.5–486.0) 426.0 (400.8-450.3) 433.5 (367.5-487.3) 0.781
T2 436.0 (382.0-487.0) 475.5 (447.3-496.8)* 488.0 (409.8-527.3)* 0.028
T3 440.0 (394.5-493.5) 497.5 (486.8-534.5)# 502.5 (441.3–554.0)* 0.005
PaCO2, mmHg T1 45.0 (39.5–50.0) 46.0 (40.3–49.0) 46.0 (37.0–49.0) 0.881
T2 42.0 (39.0–46.0) 42.0 (40.0-47.8) 42.0 (38.8–47.3) 0.970
T3 40.0 (38.0–42.0) 44.0 (39.3–47.8)* 42.0 (39.0-46.3)* 0.025
Cdyn, mL/cmH2O T1 320.0 (300.0-335.0) 320.0 (310.0-350.0) 310.0 (300.0-322.5) 0.080
T2 320.0 (295.0-355.0) 360.0 (332.5–370.0)# 350.0 (340.0-360.0)* 0.005
T3 330.0 (305.0-345.0) 340.0 (330.0-360.0)* 340.0 (330.0-370.0)* 0.009
Ppeak, cmH2O T1 17.0 (16.0–20.0) 18.0 (16.0–19.0) 19.0 (17.0–20.0) 0.379
T2 18.0 (17.5–21.0) 17.0 (16.0-18.8)# 17.0 (15.8–19.0)* 0.004
T3 19.0 (18.0–21.0) 17.0 (15.3–20.0)* 17.0 (16.0–19.0)* 0.012
Pplat, cmH2O T1 13.0 (11.5–14.5) 14.0 (12.0-15.8) 15.0 (13.0-16.3) 0.068
T2 14.0 (13.0–17.0) 13.0 (11.3–14.8)* 13.0 (11.0–15.0)* 0.005
T3 16.0 (13.5–17.0) 13.0 (11.0–15.0)# 14.0 (11.8–15.3)* 0.003
Heart rate, min− 1 T1 81 (65–102) 80 (65–93) 76 (72–92) 0.779
T2 66 (58–92) 70 (62–87) 68 (62–83) 0.891
T3 64 (56–93) 65 (59–80) 68 (63–85) 0.421
MAP, mmHga T1 88.0 (77.0-101.5) 93.0 (85.0-101.8) 93.5 (88.5–109.0) 0.419
T2 79.0 (73.5–90.0) 86.0 (77.0–95.0) 82.0 (73.8–86.5) 0.210
T3 77.0 (71.0-92.5) 78.0 (71.3–84.3) 81.0 (72.0-91.5) 0.802
  1. Data are presented as the median (interquartile range)
  2. Cdyn pulmonary dynamic compliance; DBP diastolic blood pressure; MAP mean arterial pressure; PaCO2 arterial partial pressure of carbon dioxide; PaO2 arterial partial pressure of oxygen; Ppeak airway peak pressure; Pplat airway plateau pressure; SBP systolic blood pressure
  3. a MAP=(SBP + DBP*2)/3
  4. *P < 0.05, #P < 0.01 compared to Group A at the same point in time