Delayed termination during pressure support ventilation (PSV) can be avoided with patients who have chronic obstructive pulmonary disease (COPD) by doing which of the following?
a. Increase inspiratory time
b. Increase flow-cycle percent
c. Change the flow pattern
d. Decrease peak inspiratory pressure
ANS: B
The presence of active exhalation during pressure support ventilation (PSV) indicates that the patient is trying to end the breath early. This is referred to as delayed termination and is associ-ated with patient-ventilator asynchrony. This phenomenon is often seen with patients who have increased airway resistance, as in chronic obstructive pulmonary disease (COPD). Since inspira-tory time is determined by flow cycling in PSV, increasing the flow-cycle setting will shorten inspiration, allowing more time for exhalation.
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