Table 2.
Ventilator Modes and Monitored Variables on Days 1, 2 and 3 (Mean Values) of Invasive Mechanical Ventilation.
| Overall (n=976)1 | COPD (n=56)a | ARDS (n=263)a | |
|---|---|---|---|
| Ventilator mode, no. (%) | |||
| ACP | 715 (73) | 37 (66) | 200 (76) |
| PSV | 195 (20) | 14 (25) | 46 (17.5) |
| CPAP | 29 (3) | 3 (5) | 9 (3.5) |
| ACV | 22 (2.5) | 2 (4) | 7 (2.5) |
| SIMV | 15 (1.5) | 0 (0) | 7 (2.5) |
| Monitored variable, mean±SD | |||
| Peak pressure, cm H2O | 25.5±8.1 | 24±4.8 | 28.5±8.2 |
| Plateau pressure, cm H2O | 21.5±5.8 | 20.2±4.6 | 23.6±6.4 |
| Tidal volume, ml/kg (PBW) | 10.5±3.3 | 10±3 | 9±3.3 |
| Respiratory rate, breaths/min | 20.1±4.1 | 19.3±3.8 | 21.2±4.4 |
| PaO2/FiO2 | 298.8±155 | 292.4±118 | 169±111.3 |
| PEEP, cm H2O | 6.6±2.5 | 5.8±1.5 | 9±4 |
COPD = chronic obstructive pulmonary disease; ARDS = acute respiratory distress syndrome; ACP = assisted/controlled pressure ventilation; ACV = assisted/controlled volume ventilation; PSV = pressure support ventilation; CPAP = continuous positive airway pressure; SIMV = synchronized intermittent mandatory ventilation; PBW = predicted body weight; PEEP = positive end-expiratory pressure; SD = standard deviation; 1 the percentages of missing data for all patients and for the COPD and ARDS groups in particular were 12%, 11%, and 14%, respectively; 2 refers to non-COPD and non-ARDS patients.