Final answer:
Pressure support ventilation (PSV) is the mode of ventilatory support used to wean people from a ventilator.
Step-by-step explanation:
The mode of ventilatory support used to wean people from a ventilator is Pressure support ventilation (PSV). PSV helps patients breathe more easily by providing additional pressure during the inspiratory phase of breathing. It allows the patient to initiate breaths on their own and provides support when needed, helping to gradually wean them off the ventilator.