What will be the effect of auto-PEEP on a patient receiving pressure-target breaths from a mechanical ventilator?
A. increased peak inspiratory pressure
B. reduced tidal volume
C. decreased flow-termination criterion
D. increased inspiratory time
?ANS: B
A. Incorrect response: The peak inspiratory pressure will increase in the presence of auto-PEEP during volume-targeted ventilation.
B. Correct response: The tidal volume will be reduced in the presence of auto-PEEP during pressure-targeted ventilation.
C. Incorrect response: Auto-PEEP will not affect the flow-termination criterion.
D. Incorrect response: The inspiratory time is not affected by auto-PEEP.
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