What term describes the power sources for a ventilator that can be electrical, pneumatic, or a combination, generating both negative and positive pressures?

• A. Electrical Power Sources
• B. Pneumatic Power Sources
• C. Combined Power
• D. Vent Power Sources

Answer: (D)

Powering a ventilator can come from electricity, compressed gas, or both. The term that covers all of these options is vent power sources—the general energy inputs that drive the device to create the airway pressures needed for ventilation. This label is broad enough to include electric-only systems, pneumatic-only systems, or combinations with redundancy. The other options point to a single energy type or use an uncommon label, so they don’t capture the full range of powering configurations. In practice, ventilators generate pressure changes to move air, most often positive pressure during inspiration, and having multiple power paths helps ensure continued operation if one source fails.