Author Question: You observe that a ventilator reaches a preset pressure early in inspiration but holds it for a ... (Read 77 times)

beccaep · **on:** Jul 16, 2018

You observe that a ventilator reaches a preset pressure early in inspiration but holds it for a spe-cific time, after which inspiration ends. What mode of ventilatory support is in force?

a. Time cycled
b. Pressure limited
c. Pressure cycled
d. Volume limited

Question 2

A time-cycled constant flow generator is set up with a flow of 35 L/min and an inspiratory time of 1.7 sec. What is the approximate VT?

a. 750 ml (0.75 L)
b. 1000 ml (1.00 L)
c. 1900 ml (1.90 L)
d. 1200 ml (1.20 L)

rosiehomeworddo · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: A
Time cycling occurs when the inspiratory time has elapsed.

Answer to Question 2

ANS: B
If it is used, it may be set directly, or it may occur indirectly if the set inspiratory time is longer than the inspiratory flow time (determined by the set tidal volume and flow; time = vol-ume/flow).