How often should the fractional inspired oxygen (FIO2) of an adult be measured?
a. Twice daily
b. Continuously
c. Every patient-ventilator system check
d. Every other patient-ventilator system check
ANS: C
The fractional inspired oxygen (FIO2) for a ventilated adult should be measured during each pa-tient-ventilator system check. Most ICU ventilators have oxygen analyzers that provide continu-ous monitoring of FIO2.
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