Ventilator controls are used to set which parameters?

• A. Tidal volume, respiratory rate, and inspiratory time
• B. Oxygen concentration
• C. Scavenging rate
• D. Humidification temperature

Answer: (A)

Ventilator controls are about how the machine mechanically delivers breaths. The key settings are tidal volume, respiratory rate, and inspiratory time because they determine the amount of air delivered with each breath, how many breaths occur per minute, and how long the inhalation lasts. Together, these parameters shape minute ventilation and influence CO2 removal and airway pressures, which are the core aspects of how a ventilator supports ventilation.

Oxygen concentration is also adjustable on modern ventilators, but it relates to the gas mixture rather than the mechanical breath delivery itself. Scavenging rate and humidification temperature are aspects of the anesthesia gas system and gas conditioning, not the primary breath-by-breath delivery settings.