In Pressure Control Ventilation (PCV), the clinician directly sets the inspiratory pressure level (which determines the peak inspiratory pressure), respiratory rate, inspiratory time (or I:E ratio), and PEEP. The ventilator then delivers a breath until the set pressure is reached and maintained for the set inspiratory time. The tidal volume delivered is variable and depends on the set pressure, lung compliance, and airway resistance. The inspiratory flow rate is also variable, determined by the pressure gradient and patient's inspiratory effort. Expiratory time is derived from the set respiratory rate and inspiratory time.
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