Table 4.
Intraoperative respiratory mechanics and oxygenation
| CG (n = 15) | SG (n = 15) | P value | |
|---|---|---|---|
| PaO2/FiO2 (mmHg) | 404.15 (115.87) | 451.24 (121.78) | 0.005 |
| Cstat (ml cmH2O−1) | 45.22 (9.13) | 52.54 (13.59) | < 0.0001 |
| Vds/Vt (%) | 23.05 [20.05–25.50] | 21.14 [17.94–24.93] | 0.001 |
| Raw (cmH2O L−1 s−1) | 6.84 (2.39) | 5.86 (1.31) | < 0.0001 |
| P (cmH2O) | 9.73 (4.02) | 8.26 (1.74) | < 0.0001 |
| Respiratory rate (min−1) | 16.04 [14.04–16.75] | 17.07 [15.01–18.87] | 0.0001 |
| EtCO2 (mmHg) | 37.63 [36.23–38.16] | 38.00 [36.96–39.52] | 0.017 |
| (a-Et)PCO2 (mmHg) | 7.25 (0.92) | 5.76 (1.39) | 0.007 |
Data are expressed as mean (SD) or median [IQR]
Cstat static pulmonary compliance; Vds/Vt dead space fraction; Raw airway resistance; △P driving pressure; EtCO2 end-tidal carbon dioxide tension; (a-Et)PCO2 arterial to end-tidal carbon dioxide difference; PaO2/FiO2 ratio of arterial oxygen partial pressure to fraction of inspired oxygen; SD standard deviation; IQR interquartile range