During a patient-ventilator system check, the pressure-volume loop begins at zero on the x-axis but does not return to zero during expiration. The cause of this is which of the following?

During a patient-ventilator system check, the pressure-volume loop begins at zero on the x-axis but does not return to zero during expiration. The cause of this is which of the following?

• A. Lung overdistention
• B. Ventilator circuit leak
• C. Trigger sensitivity adjustment
• D. Disconnection of patient circuit

Answer: (B)