Table 3.
Arterial blood gases and hemodynamic variables during the five different weaning tests and at 20 minutes after extubation
| PSV | PSV | PSV | PSV | T piece | After extubation | |
|---|---|---|---|---|---|---|
| +7 cmH2O PEEP | 0 cmH2O PEEP | +7 cmH2O PEEP | 0 cmH2O PEEP | |||
| +7 cmH2O | +7 cmH2O | 0 cmH2O | 0 cmH2O | |||
| Ph | 7.45 ± 0.06 | 7.44 ± 0.06 | 7.44 ± 0.06 | 7.44 ± 0.06 | 7.43 ± 0.06 | 7.42 ± 0.06 |
| PaCO2, mmHg | 41 ± 11 | 42 ± 11 | 43 ± 12 | 43 ± 12 | 44 ± 13 | 44 ± 10 |
| PaO2/FIO2 | 277 ± 76 | 257 ± 81 | 252 ± 73 | 230 ± 65 | 217 ± 65 | 224 ± 51 |
| SBP, mmHg | 148 ± 22 | 148 ± 26 | 148 ± 26 | 146 ± 30 | 150 ± 18 | 147 ± 24 |
| DBP, mmHg | 72 ± 12 | 71 ± 12 | 73 ± 12 | 72 ± 15 | 69 ± 13 | 70 ± 15 |
| HR, beats/minute | 96 ± 14 | 97 ± 16 | 98 ± 16 | 100 ± 16 | 99 ± 14 | 101 ± 15 |
There were no statistically significant differences between respiratory variables among the successive tests. Abbreviations: DBP diastolic blood pressure, HR heart rate, ND not done, PEEP positive end-expiratory pressure, PSV pressure support ventilation, SBP systolic blood pressure