Final answer:
Assist control is the ventilator mode that provides full ventilatory support by delivering a preset tidal volume and respiratory rate.
Step-by-step explanation:
The ventilator mode that provides full ventilatory support by delivering a preset tidal volume and respiratory rate is Assist control.
In Assist control mode, the ventilator delivers a preset tidal volume and respiratory rate with every breath, regardless of the patient's effort to breathe. This mode ensures that the patient receives full support from the ventilator.