Author Question: What is the maximum available tidal volume for a time-triggered, pressure-limited, time-cycled ... (Read 59 times)

notis · **on:** Jul 16, 2018

What is the maximum available tidal volume for a time-triggered, pressure-limited, time-cycled infant ventilator with the flow rate set at 8 L/min and the inspiratory time at 0.4 second?

a. 19 mL c. 53 mL
b. 22 mL d. 88 mL

Question 2

The stable jet flow from the ARABELLA System causes which of the following?

a. A decrease in the patient's work of breathing
b. A higher continuous positive airway pres-sure level for less flow through the system
c. More patient flow to switch from expira-tion to inspiration
d. More patient expiratory flow to cause a switch to expiration

frejo · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: C
Tidal volume (liters) = Inspiratory time (seconds) Flow (L/min) 60 = 0.4 8 60 = 0.053 L, or 53 mL.

Answer to Question 2

ANS: D
A more stable jet flow seems to require a more substantial patient expiratory flow to cause the device to switch into expiration. The additional flow that is required for the ARABELLA sug-gests that a patient must work harder to breathe when this system is used.