Table 2.
Ventilator settings, blood gases and blood pressure in the assist-control (ACV), inspiratory pressure support (IPS), and unsupported spontaneous breathing (USB) modes
| ACV | IPS | USB | ||
|---|---|---|---|---|
| No. of patients | 12 | 12 | 6 | |
| Ventilator settings | ||||
| Frequency, cycles per minutes | 20±5 | – | – | |
| Pressure support, cmH2O | – | 15±4 | – | |
| Positive end expiratory pressure, cmH2O | 5±2 | 5±3 | – | |
| Blood gases | ||||
| FiO2 | 45±10 | 40 | ||
| PaO2, mmHg | 95±22 | 98±27 | 92±17 | |
| PaCO2, mmHg | 44±12 | 42±9 | 44±4 | |
| Blood pressure, mmHg | 132±73/73±11 | 140±28/76±14 | 150±22/85±10 | |
Data are means ± SD; blood pressure is systolic/diastolic.