During pressure-targeted ventilation with a set pressure of 24 cm H2O, the patient coughs. The ventilator responds by in which of the following ways?
a. Inspiration ends immediately.
b. Inspiratory time increases.
c. Inspiration continues with the set pressure.
d. Inspiratory pressure ends at the maximum safety pressure.
ANS: D
It is a common misconception that the pressure-target setting cannot be exceeded during pres-sure-targeted ventilation. A cough by the patient can cause the pressure to rise above the set val-ue. This is why it is vital that a safe upper pressure limit, or maximum safety pressure, be set at approximately 10 cm H2O above the pressure-target setting during pressure ventilation.
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