Table 2.
Baseline blood gas analysis findings and ventilator’s settings.
| Parameter | Median (IQR) |
|---|---|
| Blood gas analysis | |
| pH | 7.47 (7.42–7.50) |
| PaO2 (mmHg) | 94.5 (81.0–116.0) |
| SpO2 (%) | 98 (96–99) |
| PaCO2 (mmHg) | 43.0 (37.0–49.0) |
| HCO3 − (mmol/l) | 30.2 (27.8–33.6) |
| BE (mmol/l) | 7.0 (4.1–10.2) |
| ScvO2 (%) | 69 (64–75) |
| Lactate concentration (mmol/l) | 0.98 (0.81–1.23) |
| Ventilator’s settings | |
| FiO2 | 0.40 (0.40–0.45) |
| Respiratory ratio (1/minute)a | 14 (12–14) |
| PEEP (mbar) | 7.0 (6.0–8.0) |
| PS (mbar) | 12.0 (10.0–14.0) |
| Inspiratory pressure (mbar)a | 22.0 (19.0–24.0) |
IQR: interquartile range; BE: base excess; FiO2: fraction of inspired oxygen; PaCO2: arterial carbon dioxide partial pressure; PaO2: arterial oxygen partial pressure; PEEP: positive end-expiratory pressure; PS: pressure support; ScvO2: central venous oxygen saturation; SpO2: arterial oxygen saturation; HCO3 −: bicarbonate.
aFor patients on synchronized intermittent mandatory ventilation/bi-level positive airway pressure ventilation (n = 39).