Author Question: Increasing the bias flow on the CareFusion 3100A High-frequency Oscillatory Ventilator would cause ... (Read 93 times)

Garrulous · **on:** Jul 16, 2018

Increasing the bias flow on the CareFusion 3100A High-frequency Oscillatory Ventilator would cause which of the following to occur?

a. Decrease in ampli-tude c. Increase in mean airway pressure
b. Increase in percent inspiratory time d. Automatic center-ing of piston

Question 2

Which of the following actions will maximize the life of the oscillator mechanism on a Care-Fusion 3100A High-frequency Oscillatory Ventilator?

a. Use low-bias flow settings.
b. Minimize time and amplitude settings.
c. Maintain the piston at the center of the bar graph.
d. Keep the piston toward the maximum in-spiratory limit.

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

Answer to Question 1

ANS: C
Changes to the bias flow can increase mean airway pressure. A limit to how much mean airway pressure can develop in the system is controlled by the mean pressure limit control knob. This control is used to protect the patient from inadvertent increases in mean airway pressure caused by changes in bias flow, percent inspiratory time, or frequency.

Answer to Question 2

ANS: C
Keeping the piston in the center of the bar graph will prevent the piston from being driven against a mechanical stop for an extended period. Operating against a mechanical stop will wear out the oscillator mechanism quickly.