Final answer:
Controlled ventilation is a type of ventilation where the patient's breathing is completely controlled by the ventilator. This is commonly used in situations where the patient is unable to breathe on their own or requires precise control of their breathing.
Step-by-step explanation:
Controlled ventilation is a type of ventilation where the patient's breathing is completely controlled by the ventilator (option 1). In this mode, the ventilator delivers breaths to the patient at a set rate and volume, overriding the patient's natural breathing pattern.
This is commonly used in situations where the patient is unable to breathe on their own or requires precise control of their breathing.