A 27-year-old woman received from the emergency department is on ...

[misspop]

A 27-year-old woman received from the emergency department is on a nasal cannula at 5 L/min. Approximately what FiO2 is this patient receiving?
 
  a. 28
  b. 32
  c. 35
  d. 40

Question 2

Which of the following factors should be used in properly selecting an O2 delivery device?
 
  1. Knowledge of general performance of the device
  2. Physician's preference
  3. Individual capabilities of the equipment
  a. 2 and 3 only
  b. 1 and 2 only
  c. 1, 2, and 3
  d. 1 and 3 only

[huda]

Answer to Question 1

ANS: D
Estimating the FiO2 provided by low-flow systems: For patients with a normal rate and depth of breathing, each liter per minute of nasal O2 increases the FiO2 approximately 4. For example, a patient using a nasal cannula at 4 L/min has an estimated FiO2 of approximately 37 (21 + 16).

Answer to Question 2

ANS: D
Proper device selection requires in-depth knowledge of both the general performance characteris-tics of these systems and the individual capabilities.