| Respiratory muscle fatigue | Atelectasis | Bronchospasm | Depressed level of consciousness |
---|---|---|---|---|
90 mm Hg ≥ SAP ≥ 180 mm Hg | 2 3 |  | 6 |  |
HR ≥ 140 beats/min |  |  |  |  |
Severe arrhythmia | Â | Â | Â | Â |
RR ≥ 30 per minute | 1 2 3 | 4 5 | 6 |  |
PaO2 ≤ 60 mm Hg or SaO2 ≤ 90% | 1 2 3 | 4 5 | 6 | 7 1a |
PaCO2 ≥ 50 mm Hg | 1 2 3 | 4 5 | 6 | 7 1a |
Difficulty in expectorating | 1 2 3 | Â | Â | 7 1a |