Commonly quoted predictive variables of weaning8
| Variable | Threshold value | Sensitivity | Specificity |
|---|---|---|---|
| Threshold value=value beyond which weaning is predicted to fail. | |||
| Minute ventilation | 15 l/min | 0.78 | 0.18 |
| Maximum inspiratory pressure | –15 cm H2O | 0.97 | 0.36 |
| Tidal volume | 4 ml/kg | 1.00 | 0.11 |