Which of the following are disadvantages of delivering oxygen by reservoir masks? 1. Rebreathing CO2 2. The patient cannot eat 3. Increased risk of aspirations 4. Claustrophobia/discomfort

a. 2, 3, and 3 c. 1, 3, and 4
b. 2, 3, and 4 d. 1, 2, 3, and 4

ANS: D
Oxygen masks are confining and may not be well-tolerated by some patients. Furthermore, they must be removed during eating, drinking, and facial and airway care. Patients often report that these oxygen masks cause skin irritation, especially when they are tightly fitted. Finally, both as-piration of vomitus and rebreathing of CO2 are more likely when a mask is being used.