In volume-controlled ventilation, what is described as a variable that may be delivered relative to lung compliance?

In volume-controlled ventilation, tidal volume refers to the specific volume of air delivered to the patient with each breath. This parameter is fundamental because it is preset and consistently delivered, regardless of the changes in lung compliance or airway resistance that may occur during mechanical ventilation.

When lung compliance is compromised, such as in conditions like acute respiratory distress syndrome (ARDS) or pulmonary fibrosis, the pressure required to deliver the set tidal volume may increase. Therefore, while the tidal volume remains fixed, the impact of lung compliance is important in determining how much pressure will be generated to achieve that volume. Understanding this relationship is crucial for managing ventilator settings and ensuring adequate ventilation while avoiding potential lung injury caused by excessive pressure.