In assist/control mode (A/C), what does the ventilator provide?

In assist/control mode (A/C), the ventilator is designed to provide a specific minimum number of mandatory breaths to ensure adequate ventilation for the patient. This mode is particularly useful for patients who may be unable to maintain sufficient ventilation on their own, as it offers the safety of preset mandatory breaths while still allowing the patient the ability to initiate additional breaths as needed.

Mandatory breaths in this setting can help maintain consistent minute ventilation, supporting patients who have compromised respiratory drive or function. The mode works by delivering a breath whenever the patient triggers the ventilator, or automatically at the set rate if the patient does not breathe spontaneously within a specific time frame. This approach is intended to ensure that the patient receives adequate respiratory assistance while still allowing for some level of patient control over their breathing patterns.

Thus, the correct answer highlights the ventilator’s role in safeguarding against hypoventilation by providing at least a baseline of mechanical support, making it essential for the management of patients with respiratory failure or other compromised lung function.