When titrating the FiO2 down from 50% to 21%, in what increments should it be reduced?
a. All at once is acceptable.
b. No more than 5%.
c. 5% to 10%.
d. 10% to 20%.
ANS: C
For reducing O2 concentration from 50% to 21%, O2 changes should be in steps of 5% to 10% followed by oximetry or measurement of blood gases.
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