Contraindications to NIV
| Absolute contraindications to NIV | Relative contraindications to NIV |
|---|---|
| Impending respiratory arrest* | Confusion or agitation |
| Upper airway obstruction* | Diagnosis of pneumonia |
| Glasgow Coma Scale score <8* | Severe hypoxaemia |
| Respiratory rate <8 breaths/min* | Haemodynamic instability |
| Asthma* | Copious respiratory secretions |
| Undrained pneumothorax | Vomiting |
| Bowel obstruction | |
| Facial burns or trauma | |
| Upper airway or upper GI surgery | |
| Arterial pH < 7.25 |