Duration of phases of MV, rates of adverse events and outcomes
| Duration of phases of MV and weaning | n |
|---|---|
| Intubation to initiation of PSV (h) | 11.0 (5.0–22.0) |
| Initiation of PSV to extubation (h)* | 43.0 (13.0–121.5) |
| Total duration of MV (h) | 67.0 (25.5–156.5) |
| Proportion of all MV time in PSV mode | 80.7% |
| Outcomes | |
| Reduction in pressure support for patients who remained in PSV for 24 h (cm H2O) | 5.5 (2.0–10.0) |
| Failure to remain in PSV mode at 24 h | 53 (25.4)* |
| Failed extubation | 34 (16.3)* |
| Failed extubation >1 occasion | 6 (2.9)* |
| Tracheostomy | 32 (15.3)* |
| ICU LOS (days) | 6.0 (3.0–12.0) |
| ICU mortality | 26 (12.4)* |
Data are presented as median (IQR), n (%)* or per cent as appropriate. n=209.
*n=188, as 21 patients died prior to extubation.
ICU, intensive care unit; LOS, length of stay; MV, mechanical ventilation; PSV, pressure support ventilation.