What are some disadvantages of O2 concentrators for home O2 therapy?
1. FiO2 values decrease with increased flow.
2. Backup O2 is required in case of electrical failure.
3. They cannot operate high-pressure devices.
4. Loss of electricity disrupts delivery.
a. 2 and 4 only
b. 1, 2, and 3 only
c. 2 and 3 only
d. 1, 2, 3, and 4
ANS: D
Table 56-3 summarizes the major advantages and disadvantages of each system.
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