Which of the following are pressure ventilation variables?

The correct choice highlights the key variables associated with pressure ventilation, which are volume, inspiratory time (I-time), and sensitivity. In pressure ventilation, the primary goal is to deliver a set pressure during inhalation to ensure that the patient's lungs are adequately ventilated without exceeding the pressure limit, thereby preventing barotrauma.

Volume is significant because, while the volume of air delivered can vary, it is crucial to monitor the tidal volume achieved under the set pressure conditions. Inspiratory time is important because it affects how quickly air is delivered to the lungs, which can influence both the effectiveness of ventilation and the patient’s comfort. Sensitivity relates to the ventilator's ability to detect the patient's spontaneous efforts to initiate a breath, which is essential for ensuring synchrony between the ventilator and the patient's respiratory drive.

The other options include components that are not solely focused on the principles of pressure ventilation or mix concepts that can lead to confusion in understanding pressure-controlled settings. By identifying the correct variables, one can better grasp how to manage ventilation settings effectively and ensure proper patient care in various clinical scenarios.