Question

In contrast to negative-pressure ventilation, positive-pressure ventilation:

a) is the forcing of air into the lungs
b) is provided with a nonrebreathing mask
c) occurs when the diaphragm descends
d) can only be provided to intubated patients.

Answer 1

Positive-pressure ventilation is a mechanical way of breathing where air is forced into the lungs, as opposed to natural breathing, which involves generating negative pressure by expanding the thoracic cavity.

Step-by-step explanation:

In contrast to negative-pressure ventilation, positive-pressure ventilation is the forcing of air into the lungs. This form of ventilation is commonly applied through mechanical means, such as a ventilator, where air is pushed into the patient's lungs when they are unable to breathe adequately on their own. This is in contrast with the natural breathing process, which is driven by negative pressure created when the diaphragm descends and the thoracic cavity expands, causing a lower pressure within the lung than the atmospheric pressure and allowing air to be drawn into the lungs. Therefore, the correct answer is a) is the forcing of air into the lungs.