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Table 2 Criteria for noninvasive positive pressure ventilation discontinuation and endotracheal intubation

From: Noninvasive positive pressure ventilation as treatment for acute respiratory failure in critically ill patients

Mask intolerance due to pain, discomfort or claustrophobia
Inability to improve gas exchanges and/or dyspnea
Haemodynamic instability or evidence of cardiac ischaemia or
ventricular dysarrhythmia
Need for urgent endotracheal intubation to manage secretions or
protect the airways
Inability to improve mental status, within 30 min after the application of
noninvasive positive pressure ventilation, in hypercapnic, lethargic
chronic obstructive pulmonary disease patients or agitated hypoxaemic
patients