The ventilator mode where every breath is patient triggered, ...

[gbarreiro]

The ventilator mode where every breath is patient triggered, pressure targeted, and flow cycled with a volume target is which of the following?
 
  a. Volume support ventilation (VSV)
  b. Pressure-regulated volume control (PRVC)
  c. Airway pressure release ventilation (APRV)
  d. Pressure augmentation (Paug)

Question 2

Calculate the inspiratory time (TI) when a ventilator is set at a tidal volume (VT) of 800 mL and a constant flow rate of 40 L/min.
 
  a. 0.02 second
  b. 0.5 second
  c. 1.2 second
  d. 3.2 seconds

[alexanderhamilton]

Answer to Question 1

ANS: A
The mode being described is basically pressure support with a volume target. This describes vol-ume support ventilation (VSV). Pressure-regulated volume control (PRVC) is similar; however, the breaths can be either patient or time triggered. Pressure augmentation (Paug) is similar to VSV; however, not every breath is flow cycled. If the volume is not met during inspiration, the ventilator will change to volume cycle. Airway pressure release ventilation (APRV) is a dual mode of ventilation that allows spontaneous breathing at two levels of continuous positive air-way pressure (CPAP), where pressure support can be added.

Answer to Question 2

ANS: C
Inspiratory Time (TI) = Tidal Volume (VT)/Minute Ventilation (VE) (convert L/min to L/sec first).