Which of the following ventilator modes can ensure delivery of a preset VT during spontaneous breathing? 1. Volume support 2. Volume-assured pressure support 3. Mandatory minute ventilation
a. 2 and 3 only
b. 1 and 2 only
c. 1 and 3 only
d. 1, 2, and 3
ANS: B
Volume-assured pressure support is similar to volume support in that a minimum preset tidal volume is maintained by means of automatic adjustment of the ventilator.
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