Table 1

‚ÄÉRelative indications and contraindications for NIV at exacerbation of COPD

IndicationsContraindications
Exacerbation with respiratory acidaemia Paco2>6 kPa and pH <7.35 but >7.25Inability to protect airway
Respiratory rate >24 breaths/minLife threatening hypoxaemia
Haemodynamic instability
Impaired consciousness or agitation
Undrained pneumothorax
Inability to clear respiratory secretions