Which of the following devices could cause CO2 retention? 1. ...

[jlmhmf]

Which of the following devices could cause CO2 retention? 1. Simple mask 2. Aerosol face mask 3. Nonrebreathing mask 4. Air-entrainment mask
 
  a. 1 and 3 c. 2 and 3
  b. 1 and 2 d. 3 and 4

Question 2

In a typical adult partial rebreathing mask, the reservoir bag has an approximate volume capacity of _____ mL?
 
  a. 150-300 c. 400-600
  b. 300-500 d. 500-700

[mmpiza]

Answer to Question 1

ANS: A
Carbon dioxide rebreathing can occur if the oxygen flow to a simple or nonrebreathing mask is not sufficient to wash out the patient's exhaled gases. The flow of oxygen to a reservoir mask determines the FIO2, as do the patient's breathing pattern and the presence or absence of a reser-voir bag. Those masks with a reservoir bag will have a higher FIO2 than those without a reservoir bag.

Answer to Question 2

ANS: B
A typical partial rebreathing mask has a reservoir bag with a volume capacity of 300 to 500 mL.

[jlmhmf]

Excellent

[tkempin]

Thanks for the timely response, appreciate it