To ensure a stable FiO2 under varying patient demands, what must ...

[rachel9]

To ensure a stable FiO2 under varying patient demands, what must an O2 delivery system do?
 
  a. It must have a reservoir system at least equal to the VT.
  b. It must provide all the gas needed by the patient during inspiration.
  c. It must maintain flows that are at least equal to the patient's peak flows.
  d. It must be able to deliver any O2 concen-tration from 21 to 100.

Question 2

Delivery systems that provide only a portion of a patient's inspired gas are referred to as what?
 
  a. Fixed-performance systems
  b. Variable-performance systems
  c. High-flow O2 systems
  d. Air-entrainment systems

[jliusyl]

Answer to Question 1

ANS: B
If the system provides all of the patient's inspired gas, the FiO2 remains stable, even under changing demands.

Answer to Question 2

ANS: B
A system that supplies only a portion of the inspired gas always provides a variable FiO2. An example of a variable-performance system is a nasal cannula.

[rachel9]

Thanks for the timely response, appreciate it

[nanny]

Gracias!