Table 2.

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.