Author Question: In a spring-loaded bellows volume-delivery device, the amount of pressure is determined by the: ... (Read 63 times)

nautica902 · **on:** Jul 16, 2018

In a spring-loaded bellows volume-delivery device, the amount of pressure is determined by the:

a. location of the bellows.
b. volume setting on the ventilator.
c. tightness of the spring.
d. electrical power provided to the spring.

Question 2

The volume displacement device that creates a sinusoidal flow waveform is which of the follow-ing?

a. Rotary drive piston
b. Linear drive piston
c. Spring-loaded bellows
d. Proportional solenoid

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

Answer to Question 1

ANS: C
In a spring-loaded bellows model, an adjustable spring atop a bellows applies a force per unit ar-ea, or pressure (P = Force/area). Tightening of the spring creates greater force and therefore greater pressure. The bellows contains pre-blended gas (air and oxygen), which is administered to the patient.

Answer to Question 2

ANS: A
The rotary drive piston creates a flow pattern that is slow at the beginning of inspiration, achieves highest speed at mid-inspiration, and tapers off at end-inspiration, creating a sinusoidal wave-form (sine waveform).