The volume delivered by a time-triggered, pressure-limited, time-cycled infant ventilator is de-pendent on which of the following factors?
1. Positive end-expiratory pressure level
2. Airway resistance
3. Lung compliance
4. Chest wall compliance
a. 1 and 3 c. 2, 3, and 4
b. 1, 2, and 4 d. 1, 2, 3, and 4
ANS: C
Changes in the patient's airway resistance, lung compliance, and chest wall compliance can alter the volume delivered to the patient. Lower volumes are delivered when airway resistance is high or lung and chest wall compliance are low.
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