Routine in-home monthly maintenance of an O2 concentrator should include which of the fol-lowing?
1. Flushing the system for 20 min with an inert gas
2. Confirming the FiO2 with a calibrated O2 analyzer
3. Cleaning and replacing the internal and external filters
a. 1 and 2 only
b. 2 and 3 only
c. 1 and 3 only
d. 1, 2, and 3
ANS: B
In the home, O2 concentrator fractional inspired O2 concentration (FiO2) levels should be checked and confirmed as part of a routine monthly maintenance visit. Routine maintenance of these devices should include cleaning and replacing filters, checking the alarm system, and con-firming the FiO2 levels using either the unit's O2 sensor or a separate calibrated O2 analyzer.
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