Which device is primarily used for non-invasive positive pressure ventilation?

The BiPAP (Bilevel Positive Airway Pressure) machine is primarily used for non-invasive positive pressure ventilation because it delivers two levels of pressure: a higher inspiratory pressure for breaths and a lower expiratory pressure. This dual setting can assist patients with conditions such as chronic obstructive pulmonary disease (COPD) or acute respiratory failure by providing support for both inhalation and exhalation, improving their overall ventilation without the need for intubation.

On the other hand, while a CPAP (Continuous Positive Airway Pressure) machine also provides non-invasive ventilation, it delivers a constant pressure throughout the breathing cycle and is primarily used for conditions like obstructive sleep apnea rather than providing ventilatory support during respiratory distress.

The Venturi mask and oxygen nasal cannula are devices utilized for delivering oxygen but do not provide positive pressure ventilation. The Venturi mask allows for oxygen delivery with varying concentrations, making it useful for patients who require controlled oxygen therapy. The nasal cannula is a simple device for supplemental oxygen therapy, not designed to create positive pressure in the airway. Therefore, the BiPAP machine is recognized as the primary device for non-invasive positive pressure ventilation due to its ability to adjust pressures and assist with ventilation effectively.