Conscious and cooperative patient (chronic obstructive pulmonary |
disease patients may be an exception) |
No need for urgent endotracheal intubation to protect the airways or |
remove copious secretions |
No acute facial trauma |
No recent gastroesophageal surgery |
No active gastrointestinal bleeding |
No impaired swallowing |
Haemodynamic and rhythm stability |
Face mask adequately fitted |