Design: An analysis of 29,054 charting events gathered over 12 months from 678 ventilated patients (1,736 ventilator days) in four intensive care units at a tertiary care hospital. Measurements: Ten ventilator settings were examined, including fraction of inspired oxygen (Fio2), positive endexpiratory pressure (PEEP), tidal volume, respiratory rate, peak inspiratory flow, and pressure support. ...