Describe the mode of ventilator The mode of ventilation refers to the way in which a mechanical ventilator delivers breaths to a patient. There are several different modes of ventilation, including: Controlled mechanical ventilation (CMV): Also known as conventional or volume-controlled ventilation, this mode delivers breaths at a set tidal volume (volume of air delivered with each breath) and rate, regardless of the patient's own breathing efforts. Assist-control (AC): This mode combines elements of CMV and spontaneous breathing, providing a set rate of breaths and also triggering breaths in response to the patient's own efforts. Synchronized intermittent mandatory ventilation (SIMV): This mode delivers a set rate of mandatory breaths and allows for spontaneous breaths in between. Pressure-controlled ventilation (PCV): This mode delivers breaths at a set pressure, rather than a set volume or rate. Pressure-support ventilation (PSV): This mode provides a continuous stream of ...