Comparison of airway pressures, physiological outcomes and blood gas exchange by ventilator mode
| PAV | ACV | p Value | |
|---|---|---|---|
| Mean airway pressure (cm H2O) | 8.4 (7.1–9.0) | 9.1 (7.1–11.0) | 0.028 |
| Peak inflation pressure (cm H2O) | 17 (13–20) | 18 (14–20) | 0.036 |
| PTPdi (cm H2O.s/min) | 217 (60–556) | 309 (55–544) | 0.005 |
| Pimax (cm H2O) | 21.9 (11.2–37.3) | 23.6 (13.6–38.6) | 0.182 |
| Pemax (cm H2O) | 25.7 (6.5–42.7) | 15.9 (3.0–35.7) | 0.010 |
| Pdimax (cm H2O) | 44.3 (21.3–66.4) | 37.9 (19.5–45.2) | 0.002 |
| TAA (degrees) | 1.2 (0.4–3.5) | 1.9 (1.2–3.3) | 0.050 |
| Respiratory rate (bpm) | 54 (40–66) | 57 (46–74) | 0.025 |
| Expiratory tidal volume (mL/kg) | 6.8 (3.7–7.4) | 7.2 (2.7–7.8) | 0.182 |
| SaO2 (%) | 96 (93–98) | 93 (92–98) | 0.021 |
| FiO2 | 0.40 (0.21–0.50) | 0.50 (0.30–0.60) | 0.005 |
| PaO2 (kpa) | 7.2 (4.4–13.2) | 6.1 (3.9–11.7) | 0.158 |
| Oxygenation index | 5.6 (5.0–10.7) | 10.1 (7–16.1) | 0.002 |
| PaCO2 (kpa) | 7.6 (5.7–10.0) | 7.6 (5.7–12.1) | 0.814 |
| Desaturation episodes (n) | 1 (0–3) | 1 (0–5) | 0.200 |
The results are expressed as the median (range).
ACV, assist control ventilation; PAV, proportional assist ventilation; TAA, thoracoabdominal asynchrony.