Author Question: A volume-cycled ventilator has a rate knob for setting the controlled frequency of breathing. If ... (Read 162 times)

kfurse · **on:** Jul 16, 2018

A volume-cycled ventilator has a rate knob for setting the controlled frequency of breathing. If this control is set to 12/min, which of the following other settings will determine the inspiratory and expiratory times?

1. FiO2
2. Flow
3. Volume
a. 1 and 2 only
b. 1 and 3 only
c. 2 and 3 only
d. 1, 2, and 3

Question 2

A patient receiving time-triggered continuous mechanical ventilation at a preset rate of 10/min stops breathing. Which of the following will occur?

a. The high-pressure limit alarm will sound (if properly set).
b. The patient will continue to receive 10 breaths/min.
c. The low tidal volume (VT) alarm will sound (if properly set).
d. Ventilation will drop to zero and the ap-nea alarm will sound.

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

Answer to Question 1

ANS: C
When a rate control is used, inspiratory and expiratory times will vary according to other control settings, such as flow and volume.

Answer to Question 2

ANS: B
When triggering by time, a ventilator initiates a breath according to a predetermined time inter-val, without regard to patient effort.