Table 2.
Intraoperative blood gas analysis, respiratory mechanics and hemodynamics
| 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 |
Data are presented as the median (interquartile range)
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
a MAP=(SBP + DBP*2)/3
*P < 0.05, #P < 0.01 compared to Group A at the same point in time