In a spring-loaded bellows volume-delivery device, the amount of ...

[nautica902]

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]

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).

[nautica902]

Excellent

[momolu]

Gracias!