What distinguishes Pressure Control (PC) ventilation from Volume Control (VC) ventilation?

Pressure Control (PC) ventilation is characterized by setting a specific pressure limit that the ventilator delivers with each breath, regardless of the tidal volume achieved. This means that each breath is delivered until the set pressure is reached, providing a consistent pressure as opposed to a volume. This is particularly beneficial for patients with compromised lung compliance or those at risk of lung injury, as it helps prevent excessive pressure from being applied to the lungs, which could lead to barotrauma.

In contrast, Volume Control (VC) ventilation delivers a predetermined tidal volume with each breath. If the patient's lung mechanics change (such as increased resistance or decreased compliance), the pressure required to achieve that volume can vary significantly, potentially leading to complications.

Understanding the distinction helps clinicians tailor mechanical ventilation strategies to individual patient needs, optimizing gas exchange while minimizing lung injury.