Which of the following statements best describes the volume support mode on the Covidien PB 840?
a. The ventilator ensures that a minimum of 80% of the set tidal volume is delivered with each breath.
b. The ventilator delivers volume-targeted breaths with each inspiratory effort.
c. The ventilator delivers pressure-limited breaths; the pressure is adjusted to ensure that the set tidal volume is delivered.
d. The ventilator delivers pressure-targeted breaths, and the respiratory rate is adjust-ed to ensure delivery of a preset minute volume.
ANS: C
Volume support is pressure support ventilation with a volume target. In volume support, breaths are patient triggered (pressure or flow), pressure limited, and flow cycled. The ventilator auto-matically adjusts the pressure limit to achieve the set tidal volume.
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