Physiological effects of noninvasive positive pressure ventilation
| Effect on respiratory mechanics |
| Decreased negative deflections of intrathoracic pressure |
| Decreased work of breathing |
| Additive effects of positive pressure ventilation and external PEEP |
| Effects on gas exchange |
| Improvement of hypoxaemia and hypercapnia secondary to slower and deeper breathing pattern |
| No effects on ventilation/perfusion mismatch |
PEEP: positive end-expiratory pressure